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fs: export inode_to_bdi and use it in favor of mapping->backing_dev_info

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Now that we got rid of the bdi abuse on character devices we can always use
sb->s_bdi to get at the backing_dev_info for a file, except for the block
device special case.  Export inode_to_bdi and replace uses of
mapping->backing_dev_info with it to prepare for the removal of
mapping->backing_dev_info.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Christoph Hellwig
2015-01-14 10:42:36 +01:00
committed by Jens Axboe
parent 26ff13047e
commit de1414a654
22 changed files with 52 additions and 50 deletions
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fs/ext2/ialloc.c
+1 -1
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@@ -170,7 +170,7 @@ static void ext2_preread_inode(struct inode *inode)
struct ext2_group_desc * gdp;
struct backing_dev_info *bdi;
bdi = inode->i_mapping->backing_dev_info;
bdi = inode_to_bdi(inode);
if (bdi_read_congested(bdi))
return;
if (bdi_write_congested(bdi))