diff options
| author | Matthew Wilcox (Oracle) <[email protected]> | 2023-10-04 16:53:03 +0000 |
|---|---|---|
| committer | Andrew Morton <[email protected]> | 2023-10-18 21:34:16 +0000 |
| commit | 0b237047d5a72ffe06c0bdf2f4536f669dcd31c9 (patch) | |
| tree | 03cf27b48189f26e36323cb222de65dbacd32332 /mm/filemap.c | |
| parent | iomap: protect read_bytes_pending with the state_lock (diff) | |
| download | kernel-0b237047d5a72ffe06c0bdf2f4536f669dcd31c9.tar.gz kernel-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/[email protected]
Signed-off-by: Matthew Wilcox (Oracle) <[email protected]>
Cc: Albert Ou <[email protected]>
Cc: Alexander Gordeev <[email protected]>
Cc: Andreas Dilger <[email protected]>
Cc: Christian Borntraeger <[email protected]>
Cc: Christophe Leroy <[email protected]>
Cc: Geert Uytterhoeven <[email protected]>
Cc: Heiko Carstens <[email protected]>
Cc: Ivan Kokshaysky <[email protected]>
Cc: Matt Turner <[email protected]>
Cc: Michael Ellerman <[email protected]>
Cc: Nicholas Piggin <[email protected]>
Cc: Palmer Dabbelt <[email protected]>
Cc: Paul Walmsley <[email protected]>
Cc: Richard Henderson <[email protected]>
Cc: Sven Schnelle <[email protected]>
Cc: "Theodore Ts'o" <[email protected]>
Cc: Thomas Bogendoerfer <[email protected]>
Cc: Vasily Gorbik <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Diffstat (limited to 'mm/filemap.c')
| -rw-r--r-- | mm/filemap.c | 22 |
1 files changed, 22 insertions, 0 deletions
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. * |