diff options
| author | Yang Shi <yang.shi@linux.alibaba.com> | 2019-07-12 06:55:29 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-07-12 21:05:43 +0300 |
| commit | a4985833885b8f568bab90d5dc1886ae68dc82cf (patch) | |
| tree | ef16789b1a040868968f81508a611fdc3426c9c3 /mm/filemap.c | |
| parent | f053cbd4366051d7eb6ba1b8d529d20f719c2963 (diff) | |
| download | linux-a4985833885b8f568bab90d5dc1886ae68dc82cf.tar.xz | |
mm/filemap.c: correct the comment about VM_FAULT_RETRY
Commit 6b4c9f446981 ("filemap: drop the mmap_sem for all blocking
operations") changed when mmap_sem is dropped during filemap page fault
and when returning VM_FAULT_RETRY.
Correct the comment to reflect the change.
Link: http://lkml.kernel.org/r/1556234531-108228-1-git-send-email-yang.shi@linux.alibaba.com
Signed-off-by: Yang Shi <yang.shi@linux.alibaba.com>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Acked-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/filemap.c')
| -rw-r--r-- | mm/filemap.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/mm/filemap.c b/mm/filemap.c index 1e5e006b8557..d0cf700bf201 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -2504,10 +2504,8 @@ static struct file *do_async_mmap_readahead(struct vm_fault *vmf, * * vma->vm_mm->mmap_sem must be held on entry. * - * If our return value has VM_FAULT_RETRY set, it's because - * lock_page_or_retry() returned 0. - * The mmap_sem has usually been released in this case. - * See __lock_page_or_retry() for the exception. + * If our return value has VM_FAULT_RETRY set, it's because the mmap_sem + * may be dropped before doing I/O or by lock_page_maybe_drop_mmap(). * * If our return value does not have VM_FAULT_RETRY set, the mmap_sem * has not been released. |