diff options
Diffstat (limited to '')
| -rw-r--r-- | mm/filemap.c | 30 | ||||
| -rw-r--r-- | mm/nommu.c | 1 | ||||
| -rw-r--r-- | mm/shmem.c | 15 | ||||
| -rw-r--r-- | mm/slub.c | 2 | ||||
| -rw-r--r-- | mm/sparse-vmemmap.c | 1 | ||||
| -rw-r--r-- | mm/sparse.c | 11 |
6 files changed, 27 insertions, 33 deletions
diff --git a/mm/filemap.c b/mm/filemap.c index 5209e47b7fe3..188cf5fd3e8d 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -28,6 +28,7 @@ #include <linux/backing-dev.h> #include <linux/pagevec.h> #include <linux/blkdev.h> +#include <linux/backing-dev.h> #include <linux/security.h> #include <linux/syscalls.h> #include <linux/cpuset.h> @@ -1299,7 +1300,7 @@ int filemap_fault(struct vm_area_struct *vma, struct vm_fault *vmf) size = (i_size_read(inode) + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; if (vmf->pgoff >= size) - goto outside_data_content; + return VM_FAULT_SIGBUS; /* If we don't want any read-ahead, don't bother */ if (VM_RandomReadHint(vma)) @@ -1376,7 +1377,7 @@ retry_find: if (unlikely(vmf->pgoff >= size)) { unlock_page(page); page_cache_release(page); - goto outside_data_content; + return VM_FAULT_SIGBUS; } /* @@ -1387,15 +1388,6 @@ retry_find: vmf->page = page; return ret | VM_FAULT_LOCKED; -outside_data_content: - /* - * An external ptracer can access pages that normally aren't - * accessible.. - */ - if (vma->vm_mm == current->mm) - return VM_FAULT_SIGBUS; - - /* Fall through to the non-read-ahead case */ no_cached_page: /* * We're only likely to ever get here if MADV_RANDOM is in @@ -2510,21 +2502,17 @@ generic_file_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov, } retval = mapping->a_ops->direct_IO(rw, iocb, iov, offset, nr_segs); - if (retval) - goto out; /* * Finally, try again to invalidate clean pages which might have been - * faulted in by get_user_pages() if the source of the write was an - * mmap()ed region of the file we're writing. That's a pretty crazy - * thing to do, so we don't support it 100%. If this invalidation - * fails and we have -EIOCBQUEUED we ignore the failure. + * cached by non-direct readahead, or faulted in by get_user_pages() + * if the source of the write was an mmap'ed region of the file + * we're writing. Either one is a pretty crazy thing to do, + * so we don't support it 100%. If this invalidation + * fails, tough, the write still worked... */ if (rw == WRITE && mapping->nrpages) { - int err = invalidate_inode_pages2_range(mapping, - offset >> PAGE_CACHE_SHIFT, end); - if (err && retval >= 0) - retval = err; + invalidate_inode_pages2_range(mapping, offset >> PAGE_CACHE_SHIFT, end); } out: return retval; diff --git a/mm/nommu.c b/mm/nommu.c index 8f09333f78e1..35622c590925 100644 --- a/mm/nommu.c +++ b/mm/nommu.c @@ -12,6 +12,7 @@ * Copyright (c) 2002 Greg Ungerer <gerg@snapgear.com> */ +#include <linux/module.h> #include <linux/mm.h> #include <linux/mman.h> #include <linux/swap.h> diff --git a/mm/shmem.c b/mm/shmem.c index 404e53bb2127..253d205914ba 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -915,6 +915,21 @@ static int shmem_writepage(struct page *page, struct writeback_control *wbc) struct inode *inode; BUG_ON(!PageLocked(page)); + /* + * shmem_backing_dev_info's capabilities prevent regular writeback or + * sync from ever calling shmem_writepage; but a stacking filesystem + * may use the ->writepage of its underlying filesystem, in which case + * we want to do nothing when that underlying filesystem is tmpfs + * (writing out to swap is useful as a response to memory pressure, but + * of no use to stabilize the data) - just redirty the page, unlock it + * and claim success in this case. AOP_WRITEPAGE_ACTIVATE, and the + * page_mapped check below, must be avoided unless we're in reclaim. + */ + if (!wbc->for_reclaim) { + set_page_dirty(page); + unlock_page(page); + return 0; + } BUG_ON(page_mapped(page)); mapping = page->mapping; diff --git a/mm/slub.c b/mm/slub.c index aac1dd3c657d..bcdb2c8941a5 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -2734,7 +2734,7 @@ static void slab_mem_offline_callback(void *arg) * and offline_pages() function shoudn't call this * callback. So, we must fail. */ - BUG_ON(atomic_read(&n->nr_slabs)); + BUG_ON(atomic_long_read(&n->nr_slabs)); s->node[offline_node] = NULL; kmem_cache_free(kmalloc_caches, n); diff --git a/mm/sparse-vmemmap.c b/mm/sparse-vmemmap.c index d3b718b0c20a..22620f6a976b 100644 --- a/mm/sparse-vmemmap.c +++ b/mm/sparse-vmemmap.c @@ -24,6 +24,7 @@ #include <linux/module.h> #include <linux/spinlock.h> #include <linux/vmalloc.h> +#include <linux/sched.h> #include <asm/dma.h> #include <asm/pgalloc.h> #include <asm/pgtable.h> diff --git a/mm/sparse.c b/mm/sparse.c index 08fb14f5eea3..e06f514fe04f 100644 --- a/mm/sparse.c +++ b/mm/sparse.c @@ -220,12 +220,6 @@ static int __meminit sparse_init_one_section(struct mem_section *ms, return 1; } -__attribute__((weak)) __init -void *alloc_bootmem_high_node(pg_data_t *pgdat, unsigned long size) -{ - return NULL; -} - static unsigned long usemap_size(void) { unsigned long size_bytes; @@ -267,11 +261,6 @@ struct page __init *sparse_mem_map_populate(unsigned long pnum, int nid) if (map) return map; - map = alloc_bootmem_high_node(NODE_DATA(nid), - sizeof(struct page) * PAGES_PER_SECTION); - if (map) - return map; - map = alloc_bootmem_node(NODE_DATA(nid), sizeof(struct page) * PAGES_PER_SECTION); return map; |