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| author | Matthew Wilcox (Oracle) <willy@infradead.org> | 2023-10-04 17:53:03 +0100 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-10-18 14:34:16 -0700 |
| commit | 0b237047d5a72ffe06c0bdf2f4536f669dcd31c9 (patch) | |
| tree | 03cf27b48189f26e36323cb222de65dbacd32332 | |
| parent | f45b494e2a24d86afd79cab7c343b414c5213447 (diff) | |
| download | lwn-0b237047d5a72ffe06c0bdf2f4536f669dcd31c9.tar.gz lwn-0b237047d5a72ffe06c0bdf2f4536f669dcd31c9.zip | |
mm: add folio_end_read()
Provide a function for filesystems to call when they have finished reading
an entire folio.
Link: https://lkml.kernel.org/r/20231004165317.1061855-4-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Cc: Andreas Dilger <adilger.kernel@dilger.ca>
Cc: Christian Borntraeger <borntraeger@linux.ibm.com>
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Richard Henderson <richard.henderson@linaro.org>
Cc: Sven Schnelle <svens@linux.ibm.com>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| -rw-r--r-- | include/linux/pagemap.h | 1 | ||||
| -rw-r--r-- | mm/filemap.c | 22 |
2 files changed, 23 insertions, 0 deletions
diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h index 759b29d9a69a..bcc1ea44b4e8 100644 --- a/include/linux/pagemap.h +++ b/include/linux/pagemap.h @@ -1101,6 +1101,7 @@ static inline void wait_on_page_locked(struct page *page) folio_wait_locked(page_folio(page)); } +void folio_end_read(struct folio *folio, bool success); void wait_on_page_writeback(struct page *page); void folio_wait_writeback(struct folio *folio); int folio_wait_writeback_killable(struct folio *folio); diff --git a/mm/filemap.c b/mm/filemap.c index cd872fbc6086..1ce78c619294 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -1526,6 +1526,28 @@ void folio_unlock(struct folio *folio) EXPORT_SYMBOL(folio_unlock); /** + * folio_end_read - End read on a folio. + * @folio: The folio. + * @success: True if all reads completed successfully. + * + * When all reads against a folio have completed, filesystems should + * call this function to let the pagecache know that no more reads + * are outstanding. This will unlock the folio and wake up any thread + * sleeping on the lock. The folio will also be marked uptodate if all + * reads succeeded. + * + * Context: May be called from interrupt or process context. May not be + * called from NMI context. + */ +void folio_end_read(struct folio *folio, bool success) +{ + if (likely(success)) + folio_mark_uptodate(folio); + folio_unlock(folio); +} +EXPORT_SYMBOL(folio_end_read); + +/** * folio_end_private_2 - Clear PG_private_2 and wake any waiters. * @folio: The folio. * |