linux-dev/arch/parisc/mm/init.c, branch linus/master

parisc: Prevent ldil() to sign-extend into upper 32 bits

2022-05-23T11:44:24Z

Add some build time checks to prevent that the various usages of "ldil L%(TMPALIAS_MAP_START), %reg" sign-extends into the upper 32 bits when building a 64-bit kernel. Signed-off-by: Helge Deller

parisc: Drop __init from map_pages declaration

2022-01-28T09:15:33Z

With huge kernel pages, we randomly eat a SPARC in map_pages(). This is fixed by dropping __init from the declaration. However, map_pages references the __init routine memblock_alloc_try_nid via memblock_alloc. Thus, it needs to be marked with __ref. memblock_alloc is only called before the kernel text is set to readonly. The __ref on free_initmem is no longer needed. Comment regarding map_pages being in the init section is removed. Signed-off-by: John David Anglin Cc: stable@vger.kernel.org # v5.4+ Signed-off-by: Helge Deller

parisc: Use swap() to swap values in setup_bootmem()

2021-11-01T10:59:49Z

Signed-off-by: Yihao Han Signed-off-by: Helge Deller

parisc: fix warning in flush_tlb_all

2021-10-30T21:11:01Z

I've got the following splat after enabling preemption: [ 3.724721] BUG: using __this_cpu_add() in preemptible [00000000] code: swapper/0/1 [ 3.734630] caller is __this_cpu_preempt_check+0x38/0x50 [ 3.740635] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 5.15.0-rc4-64bit+ #324 [ 3.744605] Hardware name: 9000/785/C8000 [ 3.744605] Backtrace: [ 3.744605] [<00000000401d9d58>] show_stack+0x74/0xb0 [ 3.744605] [<0000000040c27bd4>] dump_stack_lvl+0x10c/0x188 [ 3.744605] [<0000000040c27c84>] dump_stack+0x34/0x48 [ 3.744605] [<0000000040c33438>] check_preemption_disabled+0x178/0x1b0 [ 3.744605] [<0000000040c334f8>] __this_cpu_preempt_check+0x38/0x50 [ 3.744605] [<00000000401d632c>] flush_tlb_all+0x58/0x2e0 [ 3.744605] [<00000000401075c0>] 0x401075c0 [ 3.744605] [<000000004010b8fc>] 0x4010b8fc [ 3.744605] [<00000000401080fc>] 0x401080fc [ 3.744605] [<00000000401d5224>] do_one_initcall+0x128/0x378 [ 3.744605] [<0000000040102de8>] 0x40102de8 [ 3.744605] [<0000000040c33864>] kernel_init+0x60/0x3a8 [ 3.744605] [<00000000401d1020>] ret_from_kernel_thread+0x20/0x28 [ 3.744605] Fix this by moving the __inc_irq_stat() into the locked section. Signed-off-by: Sven Schnelle Signed-off-by: Helge Deller

parisc: Rename PMD_ORDER to PMD_TABLE_ORDER

2021-08-30T08:18:25Z

This is the order of the page table allocation, not the order of a PMD. Signed-off-by: Matthew Wilcox (Oracle) Signed-off-by: Helge Deller

mm: move mem_init_print_info() into mm_init()

2021-04-30T18:20:42Z

mem_init_print_info() is called in mem_init() on each architecture, and pass NULL argument, so using void argument and move it into mm_init(). Link: https://lkml.kernel.org/r/20210317015210.33641-1-wangkefeng.wang@huawei.com Signed-off-by: Kefeng Wang Acked-by: Dave Hansen [x86] Reviewed-by: Christophe Leroy [powerpc] Acked-by: David Hildenbrand Tested-by: Anatoly Pugachev [sparc64] Acked-by: Russell King [arm] Acked-by: Mike Rapoport Cc: Catalin Marinas Cc: Richard Henderson Cc: Guo Ren Cc: Yoshinori Sato Cc: Huacai Chen Cc: Jonas Bonn Cc: Palmer Dabbelt Cc: Heiko Carstens Cc: "David S. Miller" Cc: "Peter Zijlstra" Cc: Ingo Molnar Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

parisc: Optimize per-pagetable spinlocks

2021-02-12T15:39:42Z

On parisc a spinlock is stored in the next page behind the pgd which protects against parallel accesses to the pgd. That's why one additional page (PGD_ALLOC_ORDER) is allocated for the pgd. Matthew Wilcox suggested that we instead should use a pointer in the struct page table for this spinlock and noted, that the comments for the PGD_ORDER and PMD_ORDER defines were wrong. Both suggestions are addressed with this patch. Instead of having an own spinlock to protect the pgd, we now switch to use the existing page_table_lock. Additionally, beside loading the pgd into cr25 in switch_mm_irqs_off(), the physical address of this lock is loaded into cr28 (tr4), so that we can avoid implementing a complicated lookup in assembly for this lock in the TLB fault handlers. The existing Hybrid L2/L3 page table scheme (where the pmd is adjacent to the pgd) has been dropped with this patch. Remove the locking in set_pte() and the huge-page pte functions too. They trigger a spinlock recursion on 32bit machines and seem unnecessary. Suggested-by: Matthew Wilcox Fixes: b37d1c1898b2 ("parisc: Use per-pagetable spinlock") Signed-off-by: John David Anglin Signed-off-by: Helge Deller

treewide: Convert macro and uses of section(foo) to section("foo")

2020-10-25T21:51:49Z

Use a more generic form for __section that requires quotes to avoid complications with clang and gcc differences. Remove the quote operator # from compiler_attributes.h __section macro. Convert all unquoted __section(foo) uses to quoted __section("foo"). Also convert __attribute__((section("foo"))) uses to __section("foo") even if the __attribute__ has multiple list entry forms. Conversion done using the script at: https://lore.kernel.org/lkml/75393e5ddc272dc7403de74d645e6c6e0f4e70eb.camel@perches.com/2-convert_section.pl Signed-off-by: Joe Perches Reviewed-by: Nick Desaulniers Reviewed-by: Miguel Ojeda Signed-off-by: Linus Torvalds

mm/sparse: cleanup the code surrounding memory_present()

2020-08-07T18:33:27Z

After removal of CONFIG_HAVE_MEMBLOCK_NODE_MAP we have two equivalent functions that call memory_present() for each region in memblock.memory: sparse_memory_present_with_active_regions() and membocks_present(). Moreover, all architectures have a call to either of these functions preceding the call to sparse_init() and in the most cases they are called one after the other. Mark the regions from memblock.memory as present during sparce_init() by making sparse_init() call memblocks_present(), make memblocks_present() and memory_present() functions static and remove redundant sparse_memory_present_with_active_regions() function. Also remove no longer required HAVE_MEMORY_PRESENT configuration option. Signed-off-by: Mike Rapoport Signed-off-by: Andrew Morton Link: http://lkml.kernel.org/r/20200712083130.22919-1-rppt@kernel.org Signed-off-by: Linus Torvalds

parisc: Convert to BIT_MASK() and BIT_WORD()

2020-07-21T06:04:39Z

Drop own open-coded implementation to set bits and use the kernel provided BIT_MASK() and BIT_WORD() macros. Signed-off-by: Helge Deller