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| author | Christoph Hellwig <hch@lst.de> | 2015-01-14 10:42:36 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2015-01-20 14:03:04 -0700 |
| commit | de1414a654e66b81b5348dbc5259ecf2fb61655e (patch) | |
| tree | 2b3d60d6c0dc87ba33caff3e326d5648831d6176 /mm/readahead.c | |
| parent | 26ff13047e3dc6c0230a629867e8dbd4a15a7626 (diff) | |
| download | lwn-de1414a654e66b81b5348dbc5259ecf2fb61655e.tar.gz lwn-de1414a654e66b81b5348dbc5259ecf2fb61655e.zip | |
fs: export inode_to_bdi and use it in favor of mapping->backing_dev_info
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>
Diffstat (limited to 'mm/readahead.c')
| -rw-r--r-- | mm/readahead.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/mm/readahead.c b/mm/readahead.c index 17b9172ec37f..935675844b2e 100644 --- a/mm/readahead.c +++ b/mm/readahead.c @@ -27,7 +27,7 @@ void file_ra_state_init(struct file_ra_state *ra, struct address_space *mapping) { - ra->ra_pages = mapping->backing_dev_info->ra_pages; + ra->ra_pages = inode_to_bdi(mapping->host)->ra_pages; ra->prev_pos = -1; } EXPORT_SYMBOL_GPL(file_ra_state_init); @@ -541,7 +541,7 @@ page_cache_async_readahead(struct address_space *mapping, /* * Defer asynchronous read-ahead on IO congestion. */ - if (bdi_read_congested(mapping->backing_dev_info)) + if (bdi_read_congested(inode_to_bdi(mapping->host))) return; /* do read-ahead */ |