From 4c11e554fb894b381a3dc47069259d87a2e6ffc9 Mon Sep 17 00:00:00 2001 From: Aaro Koskinen Date: Thu, 17 Mar 2016 14:17:20 -0700 Subject: drivers/firmware/broadcom/bcm47xx_nvram.c: fix incorrect __ioread32_copy Commit 1f330c327900 ("drivers/firmware/broadcom/bcm47xx_nvram.c: use __ioread32_copy() instead of open-coding") switched to use a generic copy function, but failed to notice that the header pointer is updated between the two copies, resulting in bogus data being copied in the latter one. Fix by keeping the old header pointer. The patch fixes totally broken networking on WRT54GL router (both LAN and WLAN interfaces fail to probe). Fixes: 1f330c327900 ("drivers/firmware/broadcom/bcm47xx_nvram.c: use __ioread32_copy() instead of open-coding") Signed-off-by: Aaro Koskinen Reviewed-by: Stephen Boyd Cc: Rafal Milecki Cc: Hauke Mehrtens Cc: [4.4.x] Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/firmware/broadcom/bcm47xx_nvram.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) (limited to 'drivers') diff --git a/drivers/firmware/broadcom/bcm47xx_nvram.c b/drivers/firmware/broadcom/bcm47xx_nvram.c index 0c2f0a61b0ea..0b631e5b5b84 100644 --- a/drivers/firmware/broadcom/bcm47xx_nvram.c +++ b/drivers/firmware/broadcom/bcm47xx_nvram.c @@ -94,15 +94,14 @@ static int nvram_find_and_copy(void __iomem *iobase, u32 lim) found: __ioread32_copy(nvram_buf, header, sizeof(*header) / 4); - header = (struct nvram_header *)nvram_buf; - nvram_len = header->len; + nvram_len = ((struct nvram_header *)(nvram_buf))->len; if (nvram_len > size) { pr_err("The nvram size according to the header seems to be bigger than the partition on flash\n"); nvram_len = size; } if (nvram_len >= NVRAM_SPACE) { pr_err("nvram on flash (%i bytes) is bigger than the reserved space in memory, will just copy the first %i bytes\n", - header->len, NVRAM_SPACE - 1); + nvram_len, NVRAM_SPACE - 1); nvram_len = NVRAM_SPACE - 1; } /* proceed reading data after header */ -- cgit v1.3-18-gd494 From 5057dcd0f1aaad57e07e728ba20a99e205c6b9de Mon Sep 17 00:00:00 2001 From: Igor Redko Date: Thu, 17 Mar 2016 14:19:08 -0700 Subject: virtio_balloon: export 'available' memory to balloon statistics Add a new field, VIRTIO_BALLOON_S_AVAIL, to virtio_balloon memory statistics protocol, corresponding to 'Available' in /proc/meminfo. It indicates to the hypervisor how big the balloon can be inflated without pushing the guest system to swap. Signed-off-by: Igor Redko Signed-off-by: Denis V. Lunev Reviewed-by: Roman Kagan Cc: Michael S. Tsirkin Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/virtio/virtio_balloon.c | 6 ++++++ include/uapi/linux/virtio_balloon.h | 3 ++- 2 files changed, 8 insertions(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c index 0c3691f46575..f2b77dea8d3c 100644 --- a/drivers/virtio/virtio_balloon.c +++ b/drivers/virtio/virtio_balloon.c @@ -30,6 +30,7 @@ #include #include #include +#include /* * Balloon device works in 4K page units. So each page is pointed to by @@ -229,10 +230,13 @@ static void update_balloon_stats(struct virtio_balloon *vb) unsigned long events[NR_VM_EVENT_ITEMS]; struct sysinfo i; int idx = 0; + long available; all_vm_events(events); si_meminfo(&i); + available = si_mem_available(); + update_stat(vb, idx++, VIRTIO_BALLOON_S_SWAP_IN, pages_to_bytes(events[PSWPIN])); update_stat(vb, idx++, VIRTIO_BALLOON_S_SWAP_OUT, @@ -243,6 +247,8 @@ static void update_balloon_stats(struct virtio_balloon *vb) pages_to_bytes(i.freeram)); update_stat(vb, idx++, VIRTIO_BALLOON_S_MEMTOT, pages_to_bytes(i.totalram)); + update_stat(vb, idx++, VIRTIO_BALLOON_S_AVAIL, + pages_to_bytes(available)); } /* diff --git a/include/uapi/linux/virtio_balloon.h b/include/uapi/linux/virtio_balloon.h index d7f1cbc3766c..343d7ddefe04 100644 --- a/include/uapi/linux/virtio_balloon.h +++ b/include/uapi/linux/virtio_balloon.h @@ -51,7 +51,8 @@ struct virtio_balloon_config { #define VIRTIO_BALLOON_S_MINFLT 3 /* Number of minor faults */ #define VIRTIO_BALLOON_S_MEMFREE 4 /* Total amount of free memory */ #define VIRTIO_BALLOON_S_MEMTOT 5 /* Total amount of memory */ -#define VIRTIO_BALLOON_S_NR 6 +#define VIRTIO_BALLOON_S_AVAIL 6 /* Available memory as in /proc */ +#define VIRTIO_BALLOON_S_NR 7 /* * Memory statistics structure. -- cgit v1.3-18-gd494 From fe896d1878949ea92ba547587bc3075cc688fb8f Mon Sep 17 00:00:00 2001 From: Joonsoo Kim Date: Thu, 17 Mar 2016 14:19:26 -0700 Subject: mm: introduce page reference manipulation functions The success of CMA allocation largely depends on the success of migration and key factor of it is page reference count. Until now, page reference is manipulated by direct calling atomic functions so we cannot follow up who and where manipulate it. Then, it is hard to find actual reason of CMA allocation failure. CMA allocation should be guaranteed to succeed so finding offending place is really important. In this patch, call sites where page reference is manipulated are converted to introduced wrapper function. This is preparation step to add tracepoint to each page reference manipulation function. With this facility, we can easily find reason of CMA allocation failure. There is no functional change in this patch. In addition, this patch also converts reference read sites. It will help a second step that renames page._count to something else and prevents later attempt to direct access to it (Suggested by Andrew). Signed-off-by: Joonsoo Kim Acked-by: Michal Nazarewicz Acked-by: Vlastimil Babka Cc: Minchan Kim Cc: Mel Gorman Cc: "Kirill A. Shutemov" Cc: Sergey Senozhatsky Cc: Steven Rostedt Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/mips/mm/gup.c | 2 +- arch/powerpc/mm/mmu_context_hash64.c | 3 +- arch/powerpc/mm/pgtable_64.c | 2 +- arch/powerpc/platforms/512x/mpc512x_shared.c | 2 +- arch/x86/mm/gup.c | 2 +- drivers/block/aoe/aoecmd.c | 4 +- drivers/net/ethernet/freescale/gianfar.c | 2 +- drivers/net/ethernet/intel/fm10k/fm10k_main.c | 2 +- drivers/net/ethernet/intel/igb/igb_main.c | 2 +- drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 2 +- drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c | 2 +- drivers/net/ethernet/mellanox/mlx4/en_rx.c | 9 ++- drivers/net/ethernet/sun/niu.c | 2 +- fs/nilfs2/page.c | 2 +- include/linux/mm.h | 25 ++----- include/linux/page_ref.h | 85 +++++++++++++++++++++++ include/linux/pagemap.h | 19 +---- mm/debug.c | 2 +- mm/huge_memory.c | 6 +- mm/internal.h | 7 +- mm/memory_hotplug.c | 4 +- mm/migrate.c | 10 +-- mm/page_alloc.c | 12 ++-- mm/vmscan.c | 6 +- net/core/sock.c | 2 +- 25 files changed, 134 insertions(+), 82 deletions(-) create mode 100644 include/linux/page_ref.h (limited to 'drivers') diff --git a/arch/mips/mm/gup.c b/arch/mips/mm/gup.c index 1afd87c999b0..6cdffc76735c 100644 --- a/arch/mips/mm/gup.c +++ b/arch/mips/mm/gup.c @@ -64,7 +64,7 @@ static inline void get_head_page_multiple(struct page *page, int nr) { VM_BUG_ON(page != compound_head(page)); VM_BUG_ON(page_count(page) == 0); - atomic_add(nr, &page->_count); + page_ref_add(page, nr); SetPageReferenced(page); } diff --git a/arch/powerpc/mm/mmu_context_hash64.c b/arch/powerpc/mm/mmu_context_hash64.c index 4e4efbc2658e..9ca6fe16cb29 100644 --- a/arch/powerpc/mm/mmu_context_hash64.c +++ b/arch/powerpc/mm/mmu_context_hash64.c @@ -118,8 +118,7 @@ static void destroy_pagetable_page(struct mm_struct *mm) /* drop all the pending references */ count = ((unsigned long)pte_frag & ~PAGE_MASK) >> PTE_FRAG_SIZE_SHIFT; /* We allow PTE_FRAG_NR fragments from a PTE page */ - count = atomic_sub_return(PTE_FRAG_NR - count, &page->_count); - if (!count) { + if (page_ref_sub_and_test(page, PTE_FRAG_NR - count)) { pgtable_page_dtor(page); free_hot_cold_page(page, 0); } diff --git a/arch/powerpc/mm/pgtable_64.c b/arch/powerpc/mm/pgtable_64.c index cdf2123d46db..d9cc66cbdbb7 100644 --- a/arch/powerpc/mm/pgtable_64.c +++ b/arch/powerpc/mm/pgtable_64.c @@ -403,7 +403,7 @@ static pte_t *__alloc_for_cache(struct mm_struct *mm, int kernel) * count. */ if (likely(!mm->context.pte_frag)) { - atomic_set(&page->_count, PTE_FRAG_NR); + set_page_count(page, PTE_FRAG_NR); mm->context.pte_frag = ret + PTE_FRAG_SIZE; } spin_unlock(&mm->page_table_lock); diff --git a/arch/powerpc/platforms/512x/mpc512x_shared.c b/arch/powerpc/platforms/512x/mpc512x_shared.c index 711f3d352af7..452da2391153 100644 --- a/arch/powerpc/platforms/512x/mpc512x_shared.c +++ b/arch/powerpc/platforms/512x/mpc512x_shared.c @@ -188,7 +188,7 @@ static struct fsl_diu_shared_fb __attribute__ ((__aligned__(8))) diu_shared_fb; static inline void mpc512x_free_bootmem(struct page *page) { BUG_ON(PageTail(page)); - BUG_ON(atomic_read(&page->_count) > 1); + BUG_ON(page_ref_count(page) > 1); free_reserved_page(page); } diff --git a/arch/x86/mm/gup.c b/arch/x86/mm/gup.c index d8a798d8bf50..f8d0b5e8bdfd 100644 --- a/arch/x86/mm/gup.c +++ b/arch/x86/mm/gup.c @@ -131,7 +131,7 @@ static inline void get_head_page_multiple(struct page *page, int nr) { VM_BUG_ON_PAGE(page != compound_head(page), page); VM_BUG_ON_PAGE(page_count(page) == 0, page); - atomic_add(nr, &page->_count); + page_ref_add(page, nr); SetPageReferenced(page); } diff --git a/drivers/block/aoe/aoecmd.c b/drivers/block/aoe/aoecmd.c index d048d2009e89..437b3a822f44 100644 --- a/drivers/block/aoe/aoecmd.c +++ b/drivers/block/aoe/aoecmd.c @@ -875,7 +875,7 @@ bio_pageinc(struct bio *bio) * compound pages is no longer allowed by the kernel. */ page = compound_head(bv.bv_page); - atomic_inc(&page->_count); + page_ref_inc(page); } } @@ -888,7 +888,7 @@ bio_pagedec(struct bio *bio) bio_for_each_segment(bv, bio, iter) { page = compound_head(bv.bv_page); - atomic_dec(&page->_count); + page_ref_dec(page); } } diff --git a/drivers/net/ethernet/freescale/gianfar.c b/drivers/net/ethernet/freescale/gianfar.c index b9ecf197ad11..f21b2c479780 100644 --- a/drivers/net/ethernet/freescale/gianfar.c +++ b/drivers/net/ethernet/freescale/gianfar.c @@ -2944,7 +2944,7 @@ static bool gfar_add_rx_frag(struct gfar_rx_buff *rxb, u32 lstatus, /* change offset to the other half */ rxb->page_offset ^= GFAR_RXB_TRUESIZE; - atomic_inc(&page->_count); + page_ref_inc(page); return true; } diff --git a/drivers/net/ethernet/intel/fm10k/fm10k_main.c b/drivers/net/ethernet/intel/fm10k/fm10k_main.c index b243c3cbe68f..b4547ebed774 100644 --- a/drivers/net/ethernet/intel/fm10k/fm10k_main.c +++ b/drivers/net/ethernet/intel/fm10k/fm10k_main.c @@ -243,7 +243,7 @@ static bool fm10k_can_reuse_rx_page(struct fm10k_rx_buffer *rx_buffer, /* Even if we own the page, we are not allowed to use atomic_set() * This would break get_page_unless_zero() users. */ - atomic_inc(&page->_count); + page_ref_inc(page); return true; } diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c index 31e5f3942839..5b4ad1ad4d5f 100644 --- a/drivers/net/ethernet/intel/igb/igb_main.c +++ b/drivers/net/ethernet/intel/igb/igb_main.c @@ -6630,7 +6630,7 @@ static bool igb_can_reuse_rx_page(struct igb_rx_buffer *rx_buffer, /* Even if we own the page, we are not allowed to use atomic_set() * This would break get_page_unless_zero() users. */ - atomic_inc(&page->_count); + page_ref_inc(page); return true; } diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c index c4003a88bbf6..e6035ff6b861 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c @@ -1942,7 +1942,7 @@ static bool ixgbe_add_rx_frag(struct ixgbe_ring *rx_ring, /* Even if we own the page, we are not allowed to use atomic_set() * This would break get_page_unless_zero() users. */ - atomic_inc(&page->_count); + page_ref_inc(page); return true; } diff --git a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c index 3558f019b631..0ea14c0a2e74 100644 --- a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c +++ b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c @@ -837,7 +837,7 @@ add_tail_frag: /* Even if we own the page, we are not allowed to use atomic_set() * This would break get_page_unless_zero() users. */ - atomic_inc(&page->_count); + page_ref_inc(page); return true; } diff --git a/drivers/net/ethernet/mellanox/mlx4/en_rx.c b/drivers/net/ethernet/mellanox/mlx4/en_rx.c index 41440b2b20a3..86bcfe510e4e 100644 --- a/drivers/net/ethernet/mellanox/mlx4/en_rx.c +++ b/drivers/net/ethernet/mellanox/mlx4/en_rx.c @@ -82,8 +82,7 @@ static int mlx4_alloc_pages(struct mlx4_en_priv *priv, /* Not doing get_page() for each frag is a big win * on asymetric workloads. Note we can not use atomic_set(). */ - atomic_add(page_alloc->page_size / frag_info->frag_stride - 1, - &page->_count); + page_ref_add(page, page_alloc->page_size / frag_info->frag_stride - 1); return 0; } @@ -127,7 +126,7 @@ out: dma_unmap_page(priv->ddev, page_alloc[i].dma, page_alloc[i].page_size, PCI_DMA_FROMDEVICE); page = page_alloc[i].page; - atomic_set(&page->_count, 1); + set_page_count(page, 1); put_page(page); } } @@ -165,7 +164,7 @@ static int mlx4_en_init_allocator(struct mlx4_en_priv *priv, en_dbg(DRV, priv, " frag %d allocator: - size:%d frags:%d\n", i, ring->page_alloc[i].page_size, - atomic_read(&ring->page_alloc[i].page->_count)); + page_ref_count(ring->page_alloc[i].page)); } return 0; @@ -177,7 +176,7 @@ out: dma_unmap_page(priv->ddev, page_alloc->dma, page_alloc->page_size, PCI_DMA_FROMDEVICE); page = page_alloc->page; - atomic_set(&page->_count, 1); + set_page_count(page, 1); put_page(page); page_alloc->page = NULL; } diff --git a/drivers/net/ethernet/sun/niu.c b/drivers/net/ethernet/sun/niu.c index ab6051a43134..9cc45649f477 100644 --- a/drivers/net/ethernet/sun/niu.c +++ b/drivers/net/ethernet/sun/niu.c @@ -3341,7 +3341,7 @@ static int niu_rbr_add_page(struct niu *np, struct rx_ring_info *rp, niu_hash_page(rp, page, addr); if (rp->rbr_blocks_per_page > 1) - atomic_add(rp->rbr_blocks_per_page - 1, &page->_count); + page_ref_add(page, rp->rbr_blocks_per_page - 1); for (i = 0; i < rp->rbr_blocks_per_page; i++) { __le32 *rbr = &rp->rbr[start_index + i]; diff --git a/fs/nilfs2/page.c b/fs/nilfs2/page.c index 45d650addd56..c20df77eff99 100644 --- a/fs/nilfs2/page.c +++ b/fs/nilfs2/page.c @@ -180,7 +180,7 @@ void nilfs_page_bug(struct page *page) printk(KERN_CRIT "NILFS_PAGE_BUG(%p): cnt=%d index#=%llu flags=0x%lx " "mapping=%p ino=%lu\n", - page, atomic_read(&page->_count), + page, page_ref_count(page), (unsigned long long)page->index, page->flags, m, ino); if (page_has_buffers(page)) { diff --git a/include/linux/mm.h b/include/linux/mm.h index f7fd64227d3a..997fc2e5d9d8 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -22,6 +22,7 @@ #include #include #include +#include struct mempolicy; struct anon_vma; @@ -386,8 +387,8 @@ static inline int pmd_devmap(pmd_t pmd) */ static inline int put_page_testzero(struct page *page) { - VM_BUG_ON_PAGE(atomic_read(&page->_count) == 0, page); - return atomic_dec_and_test(&page->_count); + VM_BUG_ON_PAGE(page_ref_count(page) == 0, page); + return page_ref_dec_and_test(page); } /* @@ -398,7 +399,7 @@ static inline int put_page_testzero(struct page *page) */ static inline int get_page_unless_zero(struct page *page) { - return atomic_inc_not_zero(&page->_count); + return page_ref_add_unless(page, 1, 0); } extern int page_is_ram(unsigned long pfn); @@ -486,11 +487,6 @@ static inline int total_mapcount(struct page *page) } #endif -static inline int page_count(struct page *page) -{ - return atomic_read(&compound_head(page)->_count); -} - static inline struct page *virt_to_head_page(const void *x) { struct page *page = virt_to_page(x); @@ -498,15 +494,6 @@ static inline struct page *virt_to_head_page(const void *x) return compound_head(page); } -/* - * Setup the page count before being freed into the page allocator for - * the first time (boot or memory hotplug) - */ -static inline void init_page_count(struct page *page) -{ - atomic_set(&page->_count, 1); -} - void __put_page(struct page *page); void put_pages_list(struct list_head *pages); @@ -716,8 +703,8 @@ static inline void get_page(struct page *page) * Getting a normal page or the head of a compound page * requires to already have an elevated page->_count. */ - VM_BUG_ON_PAGE(atomic_read(&page->_count) <= 0, page); - atomic_inc(&page->_count); + VM_BUG_ON_PAGE(page_ref_count(page) <= 0, page); + page_ref_inc(page); if (unlikely(is_zone_device_page(page))) get_zone_device_page(page); diff --git a/include/linux/page_ref.h b/include/linux/page_ref.h new file mode 100644 index 000000000000..30f5817f6b8e --- /dev/null +++ b/include/linux/page_ref.h @@ -0,0 +1,85 @@ +#ifndef _LINUX_PAGE_REF_H +#define _LINUX_PAGE_REF_H + +#include +#include +#include + +static inline int page_ref_count(struct page *page) +{ + return atomic_read(&page->_count); +} + +static inline int page_count(struct page *page) +{ + return atomic_read(&compound_head(page)->_count); +} + +static inline void set_page_count(struct page *page, int v) +{ + atomic_set(&page->_count, v); +} + +/* + * Setup the page count before being freed into the page allocator for + * the first time (boot or memory hotplug) + */ +static inline void init_page_count(struct page *page) +{ + set_page_count(page, 1); +} + +static inline void page_ref_add(struct page *page, int nr) +{ + atomic_add(nr, &page->_count); +} + +static inline void page_ref_sub(struct page *page, int nr) +{ + atomic_sub(nr, &page->_count); +} + +static inline void page_ref_inc(struct page *page) +{ + atomic_inc(&page->_count); +} + +static inline void page_ref_dec(struct page *page) +{ + atomic_dec(&page->_count); +} + +static inline int page_ref_sub_and_test(struct page *page, int nr) +{ + return atomic_sub_and_test(nr, &page->_count); +} + +static inline int page_ref_dec_and_test(struct page *page) +{ + return atomic_dec_and_test(&page->_count); +} + +static inline int page_ref_dec_return(struct page *page) +{ + return atomic_dec_return(&page->_count); +} + +static inline int page_ref_add_unless(struct page *page, int nr, int u) +{ + return atomic_add_unless(&page->_count, nr, u); +} + +static inline int page_ref_freeze(struct page *page, int count) +{ + return likely(atomic_cmpxchg(&page->_count, count, 0) == count); +} + +static inline void page_ref_unfreeze(struct page *page, int count) +{ + VM_BUG_ON_PAGE(page_count(page) != 0, page); + VM_BUG_ON(count == 0); + + atomic_set(&page->_count, count); +} + +#endif diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h index 183b15ea052b..1ebd65c91422 100644 --- a/include/linux/pagemap.h +++ b/include/linux/pagemap.h @@ -165,7 +165,7 @@ static inline int page_cache_get_speculative(struct page *page) * SMP requires. */ VM_BUG_ON_PAGE(page_count(page) == 0, page); - atomic_inc(&page->_count); + page_ref_inc(page); #else if (unlikely(!get_page_unless_zero(page))) { @@ -194,10 +194,10 @@ static inline int page_cache_add_speculative(struct page *page, int count) VM_BUG_ON(!in_atomic()); # endif VM_BUG_ON_PAGE(page_count(page) == 0, page); - atomic_add(count, &page->_count); + page_ref_add(page, count); #else - if (unlikely(!atomic_add_unless(&page->_count, count, 0))) + if (unlikely(!page_ref_add_unless(page, count, 0))) return 0; #endif VM_BUG_ON_PAGE(PageCompound(page) && page != compound_head(page), page); @@ -205,19 +205,6 @@ static inline int page_cache_add_speculative(struct page *page, int count) return 1; } -static inline int page_freeze_refs(struct page *page, int count) -{ - return likely(atomic_cmpxchg(&page->_count, count, 0) == count); -} - -static inline void page_unfreeze_refs(struct page *page, int count) -{ - VM_BUG_ON_PAGE(page_count(page) != 0, page); - VM_BUG_ON(count == 0); - - atomic_set(&page->_count, count); -} - #ifdef CONFIG_NUMA extern struct page *__page_cache_alloc(gfp_t gfp); #else diff --git a/mm/debug.c b/mm/debug.c index df7247b0b532..8865bfb41b0b 100644 --- a/mm/debug.c +++ b/mm/debug.c @@ -43,7 +43,7 @@ const struct trace_print_flags vmaflag_names[] = { void __dump_page(struct page *page, const char *reason) { pr_emerg("page:%p count:%d mapcount:%d mapping:%p index:%#lx", - page, atomic_read(&page->_count), page_mapcount(page), + page, page_ref_count(page), page_mapcount(page), page->mapping, page->index); if (PageCompound(page)) pr_cont(" compound_mapcount: %d", compound_mapcount(page)); diff --git a/mm/huge_memory.c b/mm/huge_memory.c index e08b1659ff19..bb944c771c82 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -2888,7 +2888,7 @@ static void __split_huge_pmd_locked(struct vm_area_struct *vma, pmd_t *pmd, page = pmd_page(*pmd); VM_BUG_ON_PAGE(!page_count(page), page); - atomic_add(HPAGE_PMD_NR - 1, &page->_count); + page_ref_add(page, HPAGE_PMD_NR - 1); write = pmd_write(*pmd); young = pmd_young(*pmd); dirty = pmd_dirty(*pmd); @@ -3257,7 +3257,7 @@ static void __split_huge_page_tail(struct page *head, int tail, struct page *page_tail = head + tail; VM_BUG_ON_PAGE(atomic_read(&page_tail->_mapcount) != -1, page_tail); - VM_BUG_ON_PAGE(atomic_read(&page_tail->_count) != 0, page_tail); + VM_BUG_ON_PAGE(page_ref_count(page_tail) != 0, page_tail); /* * tail_page->_count is zero and not changing from under us. But @@ -3270,7 +3270,7 @@ static void __split_huge_page_tail(struct page *head, int tail, * atomic_set() here would be safe on all archs (and not only on x86), * it's safer to use atomic_inc(). */ - atomic_inc(&page_tail->_count); + page_ref_inc(page_tail); page_tail->flags &= ~PAGE_FLAGS_CHECK_AT_PREP; page_tail->flags |= (head->flags & diff --git a/mm/internal.h b/mm/internal.h index 4042a8a05672..57d7b0e839f0 100644 --- a/mm/internal.h +++ b/mm/internal.h @@ -38,11 +38,6 @@ void free_pgtables(struct mmu_gather *tlb, struct vm_area_struct *start_vma, unsigned long floor, unsigned long ceiling); -static inline void set_page_count(struct page *page, int v) -{ - atomic_set(&page->_count, v); -} - extern int __do_page_cache_readahead(struct address_space *mapping, struct file *filp, pgoff_t offset, unsigned long nr_to_read, unsigned long lookahead_size); @@ -64,7 +59,7 @@ static inline unsigned long ra_submit(struct file_ra_state *ra, static inline void set_page_refcounted(struct page *page) { VM_BUG_ON_PAGE(PageTail(page), page); - VM_BUG_ON_PAGE(atomic_read(&page->_count), page); + VM_BUG_ON_PAGE(page_ref_count(page), page); set_page_count(page, 1); } diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c index c832ef3565cc..e62aa078f5c9 100644 --- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -167,7 +167,7 @@ void get_page_bootmem(unsigned long info, struct page *page, page->lru.next = (struct list_head *) type; SetPagePrivate(page); set_page_private(page, info); - atomic_inc(&page->_count); + page_ref_inc(page); } void put_page_bootmem(struct page *page) @@ -178,7 +178,7 @@ void put_page_bootmem(struct page *page) BUG_ON(type < MEMORY_HOTPLUG_MIN_BOOTMEM_TYPE || type > MEMORY_HOTPLUG_MAX_BOOTMEM_TYPE); - if (atomic_dec_return(&page->_count) == 1) { + if (page_ref_dec_return(page) == 1) { ClearPagePrivate(page); set_page_private(page, 0); INIT_LIST_HEAD(&page->lru); diff --git a/mm/migrate.c b/mm/migrate.c index fdaf0818fb30..577c94b8e959 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -349,7 +349,7 @@ int migrate_page_move_mapping(struct address_space *mapping, return -EAGAIN; } - if (!page_freeze_refs(page, expected_count)) { + if (!page_ref_freeze(page, expected_count)) { spin_unlock_irq(&mapping->tree_lock); return -EAGAIN; } @@ -363,7 +363,7 @@ int migrate_page_move_mapping(struct address_space *mapping, */ if (mode == MIGRATE_ASYNC && head && !buffer_migrate_lock_buffers(head, mode)) { - page_unfreeze_refs(page, expected_count); + page_ref_unfreeze(page, expected_count); spin_unlock_irq(&mapping->tree_lock); return -EAGAIN; } @@ -397,7 +397,7 @@ int migrate_page_move_mapping(struct address_space *mapping, * to one less reference. * We know this isn't the last reference. */ - page_unfreeze_refs(page, expected_count - 1); + page_ref_unfreeze(page, expected_count - 1); spin_unlock(&mapping->tree_lock); /* Leave irq disabled to prevent preemption while updating stats */ @@ -451,7 +451,7 @@ int migrate_huge_page_move_mapping(struct address_space *mapping, return -EAGAIN; } - if (!page_freeze_refs(page, expected_count)) { + if (!page_ref_freeze(page, expected_count)) { spin_unlock_irq(&mapping->tree_lock); return -EAGAIN; } @@ -463,7 +463,7 @@ int migrate_huge_page_move_mapping(struct address_space *mapping, radix_tree_replace_slot(pslot, newpage); - page_unfreeze_refs(page, expected_count - 1); + page_ref_unfreeze(page, expected_count - 1); spin_unlock_irq(&mapping->tree_lock); diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 096a00d98a45..30134a8f7cc8 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -766,7 +766,7 @@ static inline int free_pages_check(struct page *page) bad_reason = "nonzero mapcount"; if (unlikely(page->mapping != NULL)) bad_reason = "non-NULL mapping"; - if (unlikely(atomic_read(&page->_count) != 0)) + if (unlikely(page_ref_count(page) != 0)) bad_reason = "nonzero _count"; if (unlikely(page->flags & PAGE_FLAGS_CHECK_AT_FREE)) { bad_reason = "PAGE_FLAGS_CHECK_AT_FREE flag(s) set"; @@ -1462,7 +1462,7 @@ static inline int check_new_page(struct page *page) bad_reason = "nonzero mapcount"; if (unlikely(page->mapping != NULL)) bad_reason = "non-NULL mapping"; - if (unlikely(atomic_read(&page->_count) != 0)) + if (unlikely(page_ref_count(page) != 0)) bad_reason = "nonzero _count"; if (unlikely(page->flags & __PG_HWPOISON)) { bad_reason = "HWPoisoned (hardware-corrupted)"; @@ -3475,7 +3475,7 @@ refill: /* Even if we own the page, we do not use atomic_set(). * This would break get_page_unless_zero() users. */ - atomic_add(size - 1, &page->_count); + page_ref_add(page, size - 1); /* reset page count bias and offset to start of new frag */ nc->pfmemalloc = page_is_pfmemalloc(page); @@ -3487,7 +3487,7 @@ refill: if (unlikely(offset < 0)) { page = virt_to_page(nc->va); - if (!atomic_sub_and_test(nc->pagecnt_bias, &page->_count)) + if (!page_ref_sub_and_test(page, nc->pagecnt_bias)) goto refill; #if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) @@ -3495,7 +3495,7 @@ refill: size = nc->size; #endif /* OK, page count is 0, we can safely set it */ - atomic_set(&page->_count, size); + set_page_count(page, size); /* reset page count bias and offset to start of new frag */ nc->pagecnt_bias = size; @@ -6852,7 +6852,7 @@ bool has_unmovable_pages(struct zone *zone, struct page *page, int count, * This check already skips compound tails of THP * because their page->_count is zero at all time. */ - if (!atomic_read(&page->_count)) { + if (!page_ref_count(page)) { if (PageBuddy(page)) iter += (1 << page_order(page)) - 1; continue; diff --git a/mm/vmscan.c b/mm/vmscan.c index b41b82d4bab1..b934223eaa45 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -638,11 +638,11 @@ static int __remove_mapping(struct address_space *mapping, struct page *page, * Note that if SetPageDirty is always performed via set_page_dirty, * and thus under tree_lock, then this ordering is not required. */ - if (!page_freeze_refs(page, 2)) + if (!page_ref_freeze(page, 2)) goto cannot_free; /* note: atomic_cmpxchg in page_freeze_refs provides the smp_rmb */ if (unlikely(PageDirty(page))) { - page_unfreeze_refs(page, 2); + page_ref_unfreeze(page, 2); goto cannot_free; } @@ -704,7 +704,7 @@ int remove_mapping(struct address_space *mapping, struct page *page) * drops the pagecache ref for us without requiring another * atomic operation. */ - page_unfreeze_refs(page, 1); + page_ref_unfreeze(page, 1); return 1; } return 0; diff --git a/net/core/sock.c b/net/core/sock.c index 6c1c8bc93412..67e7efe12ff7 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -1903,7 +1903,7 @@ EXPORT_SYMBOL(sock_cmsg_send); bool skb_page_frag_refill(unsigned int sz, struct page_frag *pfrag, gfp_t gfp) { if (pfrag->page) { - if (atomic_read(&pfrag->page->_count) == 1) { + if (page_ref_count(pfrag->page) == 1) { pfrag->offset = 0; return true; } -- cgit v1.3-18-gd494 From a7c1d0a987ee3be0b87db5c95aa4fbadf7c3c1c2 Mon Sep 17 00:00:00 2001 From: Andy Shevchenko Date: Thu, 17 Mar 2016 14:22:17 -0700 Subject: device property: convert to use match_string() helper The new helper returns index of the mathing string in an array. We would use it here. Signed-off-by: Andy Shevchenko Reviewed-by: Mika Westerberg Acked-by: Rafael J. Wysocki Cc: Rasmus Villemoes Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/base/property.c | 12 ++++-------- 1 file changed, 4 insertions(+), 8 deletions(-) (limited to 'drivers') diff --git a/drivers/base/property.c b/drivers/base/property.c index 76628a7b45f1..9b1a65debd49 100644 --- a/drivers/base/property.c +++ b/drivers/base/property.c @@ -651,7 +651,7 @@ int fwnode_property_match_string(struct fwnode_handle *fwnode, const char *propname, const char *string) { const char **values; - int nval, ret, i; + int nval, ret; nval = fwnode_property_read_string_array(fwnode, propname, NULL, 0); if (nval < 0) @@ -668,13 +668,9 @@ int fwnode_property_match_string(struct fwnode_handle *fwnode, if (ret < 0) goto out; - ret = -ENODATA; - for (i = 0; i < nval; i++) { - if (!strcmp(values[i], string)) { - ret = i; - break; - } - } + ret = match_string(values, nval, string); + if (ret < 0) + ret = -ENODATA; out: kfree(values); return ret; -- cgit v1.3-18-gd494 From dff4359448126936bf9b341ad7a1a7b6e0b6e95b Mon Sep 17 00:00:00 2001 From: Andy Shevchenko Date: Thu, 17 Mar 2016 14:22:20 -0700 Subject: pinctrl: convert to use match_string() helper The new helper returns index of the mathing string in an array. We would use it here. Signed-off-by: Andy Shevchenko Acked-by: Linus Walleij Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/pinctrl/pinmux.c | 13 +++---------- 1 file changed, 3 insertions(+), 10 deletions(-) (limited to 'drivers') diff --git a/drivers/pinctrl/pinmux.c b/drivers/pinctrl/pinmux.c index 29984b36926a..c223a9ef1fe1 100644 --- a/drivers/pinctrl/pinmux.c +++ b/drivers/pinctrl/pinmux.c @@ -334,7 +334,6 @@ int pinmux_map_to_setting(struct pinctrl_map const *map, unsigned num_groups; int ret; const char *group; - int i; if (!pmxops) { dev_err(pctldev->dev, "does not support mux function\n"); @@ -363,19 +362,13 @@ int pinmux_map_to_setting(struct pinctrl_map const *map, return -EINVAL; } if (map->data.mux.group) { - bool found = false; group = map->data.mux.group; - for (i = 0; i < num_groups; i++) { - if (!strcmp(group, groups[i])) { - found = true; - break; - } - } - if (!found) { + ret = match_string(groups, num_groups, group); + if (ret < 0) { dev_err(pctldev->dev, "invalid group \"%s\" for function \"%s\"\n", group, map->data.mux.function); - return -EINVAL; + return ret; } } else { group = groups[0]; -- cgit v1.3-18-gd494 From 7a5cf52dbbd67979ce9805311492e606abee0f6a Mon Sep 17 00:00:00 2001 From: Andy Shevchenko Date: Thu, 17 Mar 2016 14:22:23 -0700 Subject: drm/edid: convert to use match_string() helper The new helper returns index of the mathing string in an array. We would use it here. Signed-off-by: Andy Shevchenko Cc: David Airlie Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/gpu/drm/drm_edid_load.c | 17 ++++++----------- 1 file changed, 6 insertions(+), 11 deletions(-) (limited to 'drivers') diff --git a/drivers/gpu/drm/drm_edid_load.c b/drivers/gpu/drm/drm_edid_load.c index 698b8c3b09d9..9a401aed98e0 100644 --- a/drivers/gpu/drm/drm_edid_load.c +++ b/drivers/gpu/drm/drm_edid_load.c @@ -170,16 +170,11 @@ static void *edid_load(struct drm_connector *connector, const char *name, int i, valid_extensions = 0; bool print_bad_edid = !connector->bad_edid_counter || (drm_debug & DRM_UT_KMS); - builtin = 0; - for (i = 0; i < GENERIC_EDIDS; i++) { - if (strcmp(name, generic_edid_name[i]) == 0) { - fwdata = generic_edid[i]; - fwsize = sizeof(generic_edid[i]); - builtin = 1; - break; - } - } - if (!builtin) { + builtin = match_string(generic_edid_name, GENERIC_EDIDS, name); + if (builtin >= 0) { + fwdata = generic_edid[builtin]; + fwsize = sizeof(generic_edid[builtin]); + } else { struct platform_device *pdev; int err; @@ -252,7 +247,7 @@ static void *edid_load(struct drm_connector *connector, const char *name, } DRM_INFO("Got %s EDID base block and %d extension%s from " - "\"%s\" for connector \"%s\"\n", builtin ? "built-in" : + "\"%s\" for connector \"%s\"\n", (builtin >= 0) ? "built-in" : "external", valid_extensions, valid_extensions == 1 ? "" : "s", name, connector_name); -- cgit v1.3-18-gd494 From 5f4768225cee9d9dae723f21b689e98cf3a82c76 Mon Sep 17 00:00:00 2001 From: Andy Shevchenko Date: Thu, 17 Mar 2016 14:22:26 -0700 Subject: power: charger_manager: convert to use match_string() helper The new helper returns index of the mathing string in an array. We would use it here. Signed-off-by: Andy Shevchenko Cc: Sebastian Reichel Cc: Dmitry Eremin-Solenikov Cc: David Woodhouse Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/power/charger-manager.c | 27 ++++----------------------- 1 file changed, 4 insertions(+), 23 deletions(-) (limited to 'drivers') diff --git a/drivers/power/charger-manager.c b/drivers/power/charger-manager.c index 1ea5d1aa268b..e664ca7c0afd 100644 --- a/drivers/power/charger-manager.c +++ b/drivers/power/charger-manager.c @@ -2019,27 +2019,6 @@ static void __exit charger_manager_cleanup(void) } module_exit(charger_manager_cleanup); -/** - * find_power_supply - find the associated power_supply of charger - * @cm: the Charger Manager representing the battery - * @psy: pointer to instance of charger's power_supply - */ -static bool find_power_supply(struct charger_manager *cm, - struct power_supply *psy) -{ - int i; - bool found = false; - - for (i = 0; cm->desc->psy_charger_stat[i]; i++) { - if (!strcmp(psy->desc->name, cm->desc->psy_charger_stat[i])) { - found = true; - break; - } - } - - return found; -} - /** * cm_notify_event - charger driver notify Charger Manager of charger event * @psy: pointer to instance of charger's power_supply @@ -2057,9 +2036,11 @@ void cm_notify_event(struct power_supply *psy, enum cm_event_types type, mutex_lock(&cm_list_mtx); list_for_each_entry(cm, &cm_list, entry) { - found_power_supply = find_power_supply(cm, psy); - if (found_power_supply) + if (match_string(cm->desc->psy_charger_stat, -1, + psy->desc->name) >= 0) { + found_power_supply = true; break; + } } mutex_unlock(&cm_list_mtx); -- cgit v1.3-18-gd494 From ea32cea140f644a4d367bc75b053255e19751034 Mon Sep 17 00:00:00 2001 From: Andy Shevchenko Date: Thu, 17 Mar 2016 14:22:29 -0700 Subject: power: ab8500: convert to use match_string() helper The new helper returns index of the mathing string in an array. We would use it here. Signed-off-by: Andy Shevchenko Acked-by: Linus Walleij Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/power/ab8500_btemp.c | 15 +++++---------- drivers/power/ab8500_charger.c | 16 +++++----------- drivers/power/ab8500_fg.c | 15 +++++---------- drivers/power/abx500_chargalg.c | 14 +++++--------- 4 files changed, 20 insertions(+), 40 deletions(-) (limited to 'drivers') diff --git a/drivers/power/ab8500_btemp.c b/drivers/power/ab8500_btemp.c index 8f8044e1acf3..bf2e5dd301e7 100644 --- a/drivers/power/ab8500_btemp.c +++ b/drivers/power/ab8500_btemp.c @@ -906,26 +906,21 @@ static int ab8500_btemp_get_property(struct power_supply *psy, static int ab8500_btemp_get_ext_psy_data(struct device *dev, void *data) { struct power_supply *psy; - struct power_supply *ext; + struct power_supply *ext = dev_get_drvdata(dev); + const char **supplicants = (const char **)ext->supplied_to; struct ab8500_btemp *di; union power_supply_propval ret; - int i, j; - bool psy_found = false; + int j; psy = (struct power_supply *)data; - ext = dev_get_drvdata(dev); di = power_supply_get_drvdata(psy); /* * For all psy where the name of your driver * appears in any supplied_to */ - for (i = 0; i < ext->num_supplicants; i++) { - if (!strcmp(ext->supplied_to[i], psy->desc->name)) - psy_found = true; - } - - if (!psy_found) + j = match_string(supplicants, ext->num_supplicants, psy->desc->name); + if (j < 0) return 0; /* Go through all properties for the psy */ diff --git a/drivers/power/ab8500_charger.c b/drivers/power/ab8500_charger.c index e388171f4e58..30de5d42b26a 100644 --- a/drivers/power/ab8500_charger.c +++ b/drivers/power/ab8500_charger.c @@ -1929,11 +1929,11 @@ static int ab8540_charger_usb_pre_chg_enable(struct ux500_charger *charger, static int ab8500_charger_get_ext_psy_data(struct device *dev, void *data) { struct power_supply *psy; - struct power_supply *ext; + struct power_supply *ext = dev_get_drvdata(dev); + const char **supplicants = (const char **)ext->supplied_to; struct ab8500_charger *di; union power_supply_propval ret; - int i, j; - bool psy_found = false; + int j; struct ux500_charger *usb_chg; usb_chg = (struct ux500_charger *)data; @@ -1941,15 +1941,9 @@ static int ab8500_charger_get_ext_psy_data(struct device *dev, void *data) di = to_ab8500_charger_usb_device_info(usb_chg); - ext = dev_get_drvdata(dev); - /* For all psy where the driver name appears in any supplied_to */ - for (i = 0; i < ext->num_supplicants; i++) { - if (!strcmp(ext->supplied_to[i], psy->desc->name)) - psy_found = true; - } - - if (!psy_found) + j = match_string(supplicants, ext->num_supplicants, psy->desc->name); + if (j < 0) return 0; /* Go through all properties for the psy */ diff --git a/drivers/power/ab8500_fg.c b/drivers/power/ab8500_fg.c index 3830dade5d69..5a36cf88578a 100644 --- a/drivers/power/ab8500_fg.c +++ b/drivers/power/ab8500_fg.c @@ -2168,26 +2168,21 @@ static int ab8500_fg_get_property(struct power_supply *psy, static int ab8500_fg_get_ext_psy_data(struct device *dev, void *data) { struct power_supply *psy; - struct power_supply *ext; + struct power_supply *ext = dev_get_drvdata(dev); + const char **supplicants = (const char **)ext->supplied_to; struct ab8500_fg *di; union power_supply_propval ret; - int i, j; - bool psy_found = false; + int j; psy = (struct power_supply *)data; - ext = dev_get_drvdata(dev); di = power_supply_get_drvdata(psy); /* * For all psy where the name of your driver * appears in any supplied_to */ - for (i = 0; i < ext->num_supplicants; i++) { - if (!strcmp(ext->supplied_to[i], psy->desc->name)) - psy_found = true; - } - - if (!psy_found) + j = match_string(supplicants, ext->num_supplicants, psy->desc->name); + if (j < 0) return 0; /* Go through all properties for the psy */ diff --git a/drivers/power/abx500_chargalg.c b/drivers/power/abx500_chargalg.c index 541f702e0451..d9104b1ab7cf 100644 --- a/drivers/power/abx500_chargalg.c +++ b/drivers/power/abx500_chargalg.c @@ -975,22 +975,18 @@ static void handle_maxim_chg_curr(struct abx500_chargalg *di) static int abx500_chargalg_get_ext_psy_data(struct device *dev, void *data) { struct power_supply *psy; - struct power_supply *ext; + struct power_supply *ext = dev_get_drvdata(dev); + const char **supplicants = (const char **)ext->supplied_to; struct abx500_chargalg *di; union power_supply_propval ret; - int i, j; - bool psy_found = false; + int j; bool capacity_updated = false; psy = (struct power_supply *)data; - ext = dev_get_drvdata(dev); di = power_supply_get_drvdata(psy); /* For all psy where the driver name appears in any supplied_to */ - for (i = 0; i < ext->num_supplicants; i++) { - if (!strcmp(ext->supplied_to[i], psy->desc->name)) - psy_found = true; - } - if (!psy_found) + j = match_string(supplicants, ext->num_supplicants, psy->desc->name); + if (j < 0) return 0; /* -- cgit v1.3-18-gd494 From 908913bdbddc0b0f00e898bfc771ae625f7a6ab3 Mon Sep 17 00:00:00 2001 From: Andy Shevchenko Date: Thu, 17 Mar 2016 14:22:32 -0700 Subject: ata: hpt366: convert to use match_string() helper The new helper returns index of the mathing string in an array. We would use it here. Signed-off-by: Andy Shevchenko Acked-by: Tejun Heo Cc: Bartlomiej Zolnierkiewicz Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/ata/pata_hpt366.c | 13 +++++-------- 1 file changed, 5 insertions(+), 8 deletions(-) (limited to 'drivers') diff --git a/drivers/ata/pata_hpt366.c b/drivers/ata/pata_hpt366.c index 0038dc4c06c7..e5fb7525a5df 100644 --- a/drivers/ata/pata_hpt366.c +++ b/drivers/ata/pata_hpt366.c @@ -176,17 +176,14 @@ static int hpt_dma_blacklisted(const struct ata_device *dev, char *modestr, const char * const list[]) { unsigned char model_num[ATA_ID_PROD_LEN + 1]; - int i = 0; + int i; ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num)); - while (list[i] != NULL) { - if (!strcmp(list[i], model_num)) { - pr_warn("%s is not supported for %s\n", - modestr, list[i]); - return 1; - } - i++; + i = match_string(list, -1, model_num); + if (i >= 0) { + pr_warn("%s is not supported for %s\n", modestr, list[i]); + return 1; } return 0; } -- cgit v1.3-18-gd494 From 9adb9254f4b0f591282f713de5356a9e75a44da3 Mon Sep 17 00:00:00 2001 From: Andy Shevchenko Date: Thu, 17 Mar 2016 14:22:35 -0700 Subject: ide: hpt366: convert to use match_string() helper The new helper returns index of the mathing string in an array. We would use it here. Signed-off-by: Andy Shevchenko Cc: "David S. Miller" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/ide/hpt366.c | 9 ++------- 1 file changed, 2 insertions(+), 7 deletions(-) (limited to 'drivers') diff --git a/drivers/ide/hpt366.c b/drivers/ide/hpt366.c index 696b6c1ec940..f94baadbf424 100644 --- a/drivers/ide/hpt366.c +++ b/drivers/ide/hpt366.c @@ -531,14 +531,9 @@ static const struct hpt_info hpt371n = { .timings = &hpt37x_timings }; -static int check_in_drive_list(ide_drive_t *drive, const char **list) +static bool check_in_drive_list(ide_drive_t *drive, const char **list) { - char *m = (char *)&drive->id[ATA_ID_PROD]; - - while (*list) - if (!strcmp(*list++, m)) - return 1; - return 0; + return match_string(list, -1, (char *)&drive->id[ATA_ID_PROD]) >= 0; } static struct hpt_info *hpt3xx_get_info(struct device *dev) -- cgit v1.3-18-gd494 From efc2cd7937fd3c32a8e0ffcdfa2603989f0a2faa Mon Sep 17 00:00:00 2001 From: Heikki Krogerus Date: Thu, 17 Mar 2016 14:22:38 -0700 Subject: usb: common: convert to use match_string() helper The new helper returns index of the mathing string in an array. We would use it here. Signed-off-by: Heikki Krogerus Signed-off-by: Andy Shevchenko Cc: Greg Kroah-Hartman Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/usb/common/common.c | 22 ++++++++-------------- 1 file changed, 8 insertions(+), 14 deletions(-) (limited to 'drivers') diff --git a/drivers/usb/common/common.c b/drivers/usb/common/common.c index e6ec125e4485..677b3f01deaa 100644 --- a/drivers/usb/common/common.c +++ b/drivers/usb/common/common.c @@ -64,18 +64,15 @@ EXPORT_SYMBOL_GPL(usb_speed_string); enum usb_device_speed usb_get_maximum_speed(struct device *dev) { const char *maximum_speed; - int err; - int i; + int ret; - err = device_property_read_string(dev, "maximum-speed", &maximum_speed); - if (err < 0) + ret = device_property_read_string(dev, "maximum-speed", &maximum_speed); + if (ret < 0) return USB_SPEED_UNKNOWN; - for (i = 0; i < ARRAY_SIZE(speed_names); i++) - if (strcmp(maximum_speed, speed_names[i]) == 0) - return i; + ret = match_string(speed_names, ARRAY_SIZE(speed_names), maximum_speed); - return USB_SPEED_UNKNOWN; + return (ret < 0) ? USB_SPEED_UNKNOWN : ret; } EXPORT_SYMBOL_GPL(usb_get_maximum_speed); @@ -109,13 +106,10 @@ static const char *const usb_dr_modes[] = { static enum usb_dr_mode usb_get_dr_mode_from_string(const char *str) { - int i; - - for (i = 0; i < ARRAY_SIZE(usb_dr_modes); i++) - if (!strcmp(usb_dr_modes[i], str)) - return i; + int ret; - return USB_DR_MODE_UNKNOWN; + ret = match_string(usb_dr_modes, ARRAY_SIZE(usb_dr_modes), str); + return (ret < 0) ? USB_DR_MODE_UNKNOWN : ret; } enum usb_dr_mode usb_get_dr_mode(struct device *dev) -- cgit v1.3-18-gd494 From 1404297ebf76fd91a41de215fc8c94c2619e5fdb Mon Sep 17 00:00:00 2001 From: Kees Cook Date: Thu, 17 Mar 2016 14:22:54 -0700 Subject: lib: update single-char callers of strtobool() Some callers of strtobool() were passing a pointer to unterminated strings. In preparation of adding multi-character processing to kstrtobool(), update the callers to not pass single-character pointers, and switch to using the new kstrtobool_from_user() helper where possible. Signed-off-by: Kees Cook Cc: Amitkumar Karwar Cc: Nishant Sarmukadam Cc: Kalle Valo Cc: Steve French Cc: Andy Shevchenko Cc: Daniel Borkmann Cc: Heiko Carstens Cc: Joe Perches Cc: Kees Cook Cc: Martin Schwidefsky Cc: Michael Ellerman Cc: Rasmus Villemoes Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/net/wireless/marvell/mwifiex/debugfs.c | 10 ++--- fs/cifs/cifs_debug.c | 56 +++++++------------------- fs/cifs/cifs_debug.h | 2 +- fs/cifs/cifsfs.c | 6 +-- fs/cifs/cifsglob.h | 4 +- 5 files changed, 24 insertions(+), 54 deletions(-) (limited to 'drivers') diff --git a/drivers/net/wireless/marvell/mwifiex/debugfs.c b/drivers/net/wireless/marvell/mwifiex/debugfs.c index 0b9c580af988..2eff989c6d9f 100644 --- a/drivers/net/wireless/marvell/mwifiex/debugfs.c +++ b/drivers/net/wireless/marvell/mwifiex/debugfs.c @@ -880,14 +880,12 @@ mwifiex_reset_write(struct file *file, { struct mwifiex_private *priv = file->private_data; struct mwifiex_adapter *adapter = priv->adapter; - char cmd; bool result; + int rc; - if (copy_from_user(&cmd, ubuf, sizeof(cmd))) - return -EFAULT; - - if (strtobool(&cmd, &result)) - return -EINVAL; + rc = kstrtobool_from_user(ubuf, count, &result); + if (rc) + return rc; if (!result) return -EINVAL; diff --git a/fs/cifs/cifs_debug.c b/fs/cifs/cifs_debug.c index 50b268483302..788e19195991 100644 --- a/fs/cifs/cifs_debug.c +++ b/fs/cifs/cifs_debug.c @@ -255,7 +255,6 @@ static const struct file_operations cifs_debug_data_proc_fops = { static ssize_t cifs_stats_proc_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos) { - char c; bool bv; int rc; struct list_head *tmp1, *tmp2, *tmp3; @@ -263,11 +262,8 @@ static ssize_t cifs_stats_proc_write(struct file *file, struct cifs_ses *ses; struct cifs_tcon *tcon; - rc = get_user(c, buffer); - if (rc) - return rc; - - if (strtobool(&c, &bv) == 0) { + rc = kstrtobool_from_user(buffer, count, &bv); + if (rc == 0) { #ifdef CONFIG_CIFS_STATS2 atomic_set(&totBufAllocCount, 0); atomic_set(&totSmBufAllocCount, 0); @@ -290,6 +286,8 @@ static ssize_t cifs_stats_proc_write(struct file *file, } } spin_unlock(&cifs_tcp_ses_lock); + } else { + return rc; } return count; @@ -433,17 +431,17 @@ static int cifsFYI_proc_open(struct inode *inode, struct file *file) static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos) { - char c; + char c[2] = { '\0' }; bool bv; int rc; - rc = get_user(c, buffer); + rc = get_user(c[0], buffer); if (rc) return rc; - if (strtobool(&c, &bv) == 0) + if (strtobool(c, &bv) == 0) cifsFYI = bv; - else if ((c > '1') && (c <= '9')) - cifsFYI = (int) (c - '0'); /* see cifs_debug.h for meanings */ + else if ((c[0] > '1') && (c[0] <= '9')) + cifsFYI = (int) (c[0] - '0'); /* see cifs_debug.h for meanings */ return count; } @@ -471,20 +469,12 @@ static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file) static ssize_t cifs_linux_ext_proc_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos) { - char c; - bool bv; int rc; - rc = get_user(c, buffer); + rc = kstrtobool_from_user(buffer, count, &linuxExtEnabled); if (rc) return rc; - rc = strtobool(&c, &bv); - if (rc) - return rc; - - linuxExtEnabled = bv; - return count; } @@ -511,20 +501,12 @@ static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file) static ssize_t cifs_lookup_cache_proc_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos) { - char c; - bool bv; int rc; - rc = get_user(c, buffer); + rc = kstrtobool_from_user(buffer, count, &lookupCacheEnabled); if (rc) return rc; - rc = strtobool(&c, &bv); - if (rc) - return rc; - - lookupCacheEnabled = bv; - return count; } @@ -551,20 +533,12 @@ static int traceSMB_proc_open(struct inode *inode, struct file *file) static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos) { - char c; - bool bv; int rc; - rc = get_user(c, buffer); + rc = kstrtobool_from_user(buffer, count, &traceSMB); if (rc) return rc; - rc = strtobool(&c, &bv); - if (rc) - return rc; - - traceSMB = bv; - return count; } @@ -622,7 +596,6 @@ static ssize_t cifs_security_flags_proc_write(struct file *file, int rc; unsigned int flags; char flags_string[12]; - char c; bool bv; if ((count < 1) || (count > 11)) @@ -635,11 +608,10 @@ static ssize_t cifs_security_flags_proc_write(struct file *file, if (count < 3) { /* single char or single char followed by null */ - c = flags_string[0]; - if (strtobool(&c, &bv) == 0) { + if (strtobool(flags_string, &bv) == 0) { global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF; return count; - } else if (!isdigit(c)) { + } else if (!isdigit(flags_string[0])) { cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string); return -EINVAL; diff --git a/fs/cifs/cifs_debug.h b/fs/cifs/cifs_debug.h index 66cf0f9fff89..c611ca2339d7 100644 --- a/fs/cifs/cifs_debug.h +++ b/fs/cifs/cifs_debug.h @@ -25,7 +25,7 @@ void cifs_dump_mem(char *label, void *data, int length); void cifs_dump_detail(void *); void cifs_dump_mids(struct TCP_Server_Info *); -extern int traceSMB; /* flag which enables the function below */ +extern bool traceSMB; /* flag which enables the function below */ void dump_smb(void *, int); #define CIFS_INFO 0x01 #define CIFS_RC 0x02 diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c index 2eea40353e60..fd8805de6a50 100644 --- a/fs/cifs/cifsfs.c +++ b/fs/cifs/cifsfs.c @@ -54,10 +54,10 @@ #endif int cifsFYI = 0; -int traceSMB = 0; +bool traceSMB; bool enable_oplocks = true; -unsigned int linuxExtEnabled = 1; -unsigned int lookupCacheEnabled = 1; +bool linuxExtEnabled = true; +bool lookupCacheEnabled = true; unsigned int global_secflags = CIFSSEC_DEF; /* unsigned int ntlmv2_support = 0; */ unsigned int sign_CIFS_PDUs = 1; diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h index a25b2513f146..d21da9f05bae 100644 --- a/fs/cifs/cifsglob.h +++ b/fs/cifs/cifsglob.h @@ -1596,11 +1596,11 @@ GLOBAL_EXTERN atomic_t midCount; /* Misc globals */ GLOBAL_EXTERN bool enable_oplocks; /* enable or disable oplocks */ -GLOBAL_EXTERN unsigned int lookupCacheEnabled; +GLOBAL_EXTERN bool lookupCacheEnabled; GLOBAL_EXTERN unsigned int global_secflags; /* if on, session setup sent with more secure ntlmssp2 challenge/resp */ GLOBAL_EXTERN unsigned int sign_CIFS_PDUs; /* enable smb packet signing */ -GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/ +GLOBAL_EXTERN bool linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/ GLOBAL_EXTERN unsigned int CIFSMaxBufSize; /* max size not including hdr */ GLOBAL_EXTERN unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */ GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */ -- cgit v1.3-18-gd494