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authorTejun Heo <tj@kernel.org>2015-05-23 00:13:41 +0300
committerJens Axboe <axboe@fb.com>2015-06-02 17:33:35 +0300
commitec8a6f2643923ee5b74d24fa8d134240379f436b (patch)
tree4188866bc98fb571c3c872d0ad972c5ccc974ee4 /include/linux/backing-dev-defs.h
parentdfb8ae567835425d27db8acc6c9fc5db88d38e2b (diff)
downloadlinux-ec8a6f2643923ee5b74d24fa8d134240379f436b.tar.xz
writeback: make congestion functions per bdi_writeback
Currently, all congestion functions take bdi (backing_dev_info) and always operate on the root wb (bdi->wb) and the congestion state from the block layer is propagated only for the root blkcg. This patch introduces {set|clear}_wb_congested() and wb_congested() which take a bdi_writeback_congested and bdi_writeback respectively. The bdi counteparts are now wrappers invoking the wb based functions on @bdi->wb. While converting clear_bdi_congested() to clear_wb_congested(), the local variable declaration order between @wqh and @bit is swapped for cosmetic reason. This patch just adds the new wb based functions. The following patches will apply them. v2: Updated for bdi_writeback_congested. Signed-off-by: Tejun Heo <tj@kernel.org> Reviewed-by: Jan Kara <jack@suse.cz> Cc: Jens Axboe <axboe@kernel.dk> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'include/linux/backing-dev-defs.h')
-rw-r--r--include/linux/backing-dev-defs.h14
1 files changed, 12 insertions, 2 deletions
diff --git a/include/linux/backing-dev-defs.h b/include/linux/backing-dev-defs.h
index a1e9c407a59a..eb386766b5f3 100644
--- a/include/linux/backing-dev-defs.h
+++ b/include/linux/backing-dev-defs.h
@@ -163,7 +163,17 @@ enum {
BLK_RW_SYNC = 1,
};
-void clear_bdi_congested(struct backing_dev_info *bdi, int sync);
-void set_bdi_congested(struct backing_dev_info *bdi, int sync);
+void clear_wb_congested(struct bdi_writeback_congested *congested, int sync);
+void set_wb_congested(struct bdi_writeback_congested *congested, int sync);
+
+static inline void clear_bdi_congested(struct backing_dev_info *bdi, int sync)
+{
+ clear_wb_congested(bdi->wb.congested, sync);
+}
+
+static inline void set_bdi_congested(struct backing_dev_info *bdi, int sync)
+{
+ set_wb_congested(bdi->wb.congested, sync);
+}
#endif /* __LINUX_BACKING_DEV_DEFS_H */