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[PATCH] Make ll_rw_block() wait for buffer lock

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Introduce new ll_rw_block() operation SWRITE meaning that block layer should
wait for the buffer lock and write-out afterwards.  Hence data in buffers at
the time of call are guaranteed to be submitted to the disk.

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Jan Kara
2005-09-06 15:19:10 -07:00
committed by Linus Torvalds
parent e6c9f5c188
commit a766223625
2 changed files with 17 additions and 14 deletions
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1
include/linux/fs.h
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@@ -69,6 +69,7 @@ extern int dir_notify_enable;
#define READ 0
#define WRITE 1
#define READA 2 /* read-ahead - don't block if no resources */
#define SWRITE 3 /* for ll_rw_block() - wait for buffer lock */
#define SPECIAL 4 /* For non-blockdevice requests in request queue */
#define READ_SYNC (READ | (1 << BIO_RW_SYNC))
#define WRITE_SYNC (WRITE | (1 << BIO_RW_SYNC))