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| author |   Song Liu <songliubraving@fb.com> | 2019-09-23 15:37:47 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2019-09-24 15:54:11 -0700 |
| commit | 31895438e702f48e25b7aa6d88f9c97c795c79c7 (patch) | |
| tree | 6d3bf756856dcab897ef9f8cf6d284079711435a /fs/proc | |
| parent | filemap: check compound_head(page)->mapping in filemap_fault() (diff) | |
| download | linux-dev-31895438e702f48e25b7aa6d88f9c97c795c79c7.tar.xz linux-dev-31895438e702f48e25b7aa6d88f9c97c795c79c7.zip | |
filemap: check compound_head(page)->mapping in pagecache_get_page()
Similar to previous patch, pagecache_get_page() avoids race condition with
truncate by checking page->mapping == mapping. This does not work for
compound pages. This patch let it check compound_head(page)->mapping
instead.
Link: http://lkml.kernel.org/r/20190801184244.3169074-3-songliubraving@fb.com
Signed-off-by: Song Liu <songliubraving@fb.com>
Suggested-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Hillf Danton <hdanton@sina.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Rik van Riel <riel@surriel.com>
Cc: William Kucharski <william.kucharski@oracle.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/proc')
0 files changed, 0 insertions, 0 deletions