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writeback: pass in super_block to bdi_start_writeback()

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Sometimes we only want to write pages from a specific super_block,
so allow that to be passed in.

This fixes a problem with commit 56a131dcf7
causing writeback on all super_blocks on a bdi, where we only really
want to sync a specific sb from writeback_inodes_sb().

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Jens Axboe 2009-09-26 00:07:46 +02:00
parent 6d7f18f6ea
commit a72bfd4dea
3 changed files with 7 additions and 4 deletions
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3
include/linux/backing-dev.h
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@ -101,7 +101,8 @@ int bdi_register(struct backing_dev_info *bdi, struct device *parent,
const char *fmt, ...);
int bdi_register_dev(struct backing_dev_info *bdi, dev_t dev);
void bdi_unregister(struct backing_dev_info *bdi);
void bdi_start_writeback(struct backing_dev_info *bdi, long nr_pages);
void bdi_start_writeback(struct backing_dev_info *bdi, struct super_block *sb,
long nr_pages);
int bdi_writeback_task(struct bdi_writeback *wb);
int bdi_has_dirty_io(struct backing_dev_info *bdi);