Commit 0b237047 authored by Matthew Wilcox (Oracle)'s avatar Matthew Wilcox (Oracle) Committed by Andrew Morton
Browse files

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: default avatarMatthew 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: default avatarAndrew Morton <akpm@linux-foundation.org>
parent f45b494e

include/linux/pagemap.h

+1 −0
Original line number Diff line number Diff line
@@ -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);

mm/filemap.c

+22 −0
Original line number Diff line number Diff line
@@ -1525,6 +1525,28 @@ 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.