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block: simplify the block device syncing code

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Get rid of the indirections and just provide a sync_bdevs
helper for the generic sync code.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20211019062530.2174626-8-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig
2021-10-19 08:25:30 +02:00
committed by Jens Axboe
parent 680e667bc2
commit 1e03a36bdf
4 changed files with 22 additions and 28 deletions
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17
block/bdev.c
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@@ -1021,7 +1021,7 @@ int __invalidate_device(struct block_device *bdev, bool kill_dirty)
}
EXPORT_SYMBOL(__invalidate_device);
void iterate_bdevs(void (*func)(struct block_device *, void *), void *arg)
void sync_bdevs(bool wait)
{
struct inode *inode, *old_inode = NULL;
@@ -1052,8 +1052,19 @@ void iterate_bdevs(void (*func)(struct block_device *, void *), void *arg)
bdev = I_BDEV(inode);
mutex_lock(&bdev->bd_disk->open_mutex);
if (bdev->bd_openers)
func(bdev, arg);
if (!bdev->bd_openers) {
; /* skip */
} else if (wait) {
/*
* We keep the error status of individual mapping so
* that applications can catch the writeback error using
* fsync(2). See filemap_fdatawait_keep_errors() for
* details.
*/
filemap_fdatawait_keep_errors(inode->i_mapping);
} else {
filemap_fdatawrite(inode->i_mapping);
}
mutex_unlock(&bdev->bd_disk->open_mutex);
spin_lock(&blockdev_superblock->s_inode_list_lock);