diff options
| author | Matthew Wilcox (Oracle) <willy@infradead.org> | 2023-08-12 02:20:33 +0200 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-08-21 22:38:02 +0200 |
| commit | 0790e1e2b1b71ba357e89e779451efe79dff28e6 (patch) | |
| tree | 2d7f981cfd7cc31641e0e8f697acd62cb5b303ec /mm/internal.h | |
| parent | mm/secretmem: use a folio in secretmem_fault() (diff) | |
| download | linux-0790e1e2b1b71ba357e89e779451efe79dff28e6.tar.xz linux-0790e1e2b1b71ba357e89e779451efe79dff28e6.zip | |
mm: allow fault_dirty_shared_page() to be called under the VMA lock
By making maybe_unlock_mmap_for_io() handle the VMA lock correctly, we
make fault_dirty_shared_page() safe to be called without the mmap lock
held.
Link: https://lkml.kernel.org/r/20230812002033.1002367-1-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reported-by: David Hildenbrand <david@redhat.com>
Tested-by: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/internal.h')
| -rw-r--r-- | mm/internal.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/internal.h b/mm/internal.h index a037b1b37f6d..c6ed10f0a5ad 100644 --- a/mm/internal.h +++ b/mm/internal.h @@ -706,7 +706,7 @@ static inline struct file *maybe_unlock_mmap_for_io(struct vm_fault *vmf, if (fault_flag_allow_retry_first(flags) && !(flags & FAULT_FLAG_RETRY_NOWAIT)) { fpin = get_file(vmf->vma->vm_file); - mmap_read_unlock(vmf->vma->vm_mm); + release_fault_lock(vmf); } return fpin; } |