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| author | Matthew Wilcox (Oracle) <willy@infradead.org> | 2023-07-24 20:54:01 +0200 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-08-18 19:12:50 +0200 |
| commit | 284e05920498788c5df1a7dd6424adb426498e1c (patch) | |
| tree | 0d7ba33616091d40551d1c74acde80ca25664afb /arch/x86/mm/fault.c | |
| parent | mm/mmap: change vma iteration order in do_vmi_align_munmap() (diff) | |
| download | linux-284e05920498788c5df1a7dd6424adb426498e1c.tar.xz linux-284e05920498788c5df1a7dd6424adb426498e1c.zip | |
mm: remove CONFIG_PER_VMA_LOCK ifdefs
Patch series "Handle most file-backed faults under the VMA lock", v3.
This patchset adds the ability to handle page faults on parts of files
which are already in the page cache without taking the mmap lock.
This patch (of 10):
Provide lock_vma_under_rcu() when CONFIG_PER_VMA_LOCK is not defined to
eliminate ifdefs in the users.
Link: https://lkml.kernel.org/r/20230724185410.1124082-1-willy@infradead.org
Link: https://lkml.kernel.org/r/20230724185410.1124082-2-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Suren Baghdasaryan <surenb@google.com>
Cc: Punit Agrawal <punit.agrawal@bytedance.com>
Cc: Arjun Roy <arjunroy@google.com>
Cc: Eric Dumazet <edumazet@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'arch/x86/mm/fault.c')
| -rw-r--r-- | arch/x86/mm/fault.c | 4 |
1 files changed, 0 insertions, 4 deletions
diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c index e8711b2cafaf..787da09d24f3 100644 --- a/arch/x86/mm/fault.c +++ b/arch/x86/mm/fault.c @@ -1328,7 +1328,6 @@ void do_user_addr_fault(struct pt_regs *regs, } #endif -#ifdef CONFIG_PER_VMA_LOCK if (!(flags & FAULT_FLAG_USER)) goto lock_mmap; @@ -1358,7 +1357,6 @@ void do_user_addr_fault(struct pt_regs *regs, return; } lock_mmap: -#endif /* CONFIG_PER_VMA_LOCK */ retry: vma = lock_mm_and_find_vma(mm, address, regs); @@ -1418,9 +1416,7 @@ retry: } mmap_read_unlock(mm); -#ifdef CONFIG_PER_VMA_LOCK done: -#endif if (likely(!(fault & VM_FAULT_ERROR))) return; |