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mm: don't include <linux/blk-cgroup.h> in <linux/writeback.h>

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blk-cgroup.h pulls in blkdev.h and thus pretty much all the block
headers.  Break this dependency chain by turning wbc_blkcg_css into a
macro and dropping the blk-cgroup.h include.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Link: https://lore.kernel.org/r/20210920123328.1399408-2-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig
2021-09-20 14:33:12 +02:00
committed by Jens Axboe
parent 3c08b0931e
commit 348332e000
5 changed files with 9 additions and 9 deletions
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14
include/linux/writeback.h
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@@ -11,7 +11,6 @@
#include <linux/flex_proportions.h>
#include <linux/backing-dev-defs.h>
#include <linux/blk_types.h>
#include <linux/blk-cgroup.h>
struct bio;
@@ -109,15 +108,12 @@ static inline int wbc_to_write_flags(struct writeback_control *wbc)
return flags;
}
static inline struct cgroup_subsys_state *
wbc_blkcg_css(struct writeback_control *wbc)
{
#ifdef CONFIG_CGROUP_WRITEBACK
if (wbc->wb)
return wbc->wb->blkcg_css;
#endif
return blkcg_root_css;
}
#define wbc_blkcg_css(wbc) \
((wbc)->wb ? (wbc)->wb->blkcg_css : blkcg_root_css)
#else
#define wbc_blkcg_css(wbc) (blkcg_root_css)
#endif /* CONFIG_CGROUP_WRITEBACK */
/*
* A wb_domain represents a domain that wb's (bdi_writeback's) belong to