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| author | Tejun Heo <tj@kernel.org> | 2012-03-05 21:15:01 (GMT) |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2012-03-06 20:27:22 (GMT) |
| commit | 2a7f124414b35645049e9c1b125a6f0b470aa5ae (patch) | |
| tree | 298d9bc310dc46baed69baf88f083c6db35f0964 /lib/div64.c | |
| parent | 72e06c255181537d0b3e1f657a9ed81655d745b1 (diff) | |
| download | linux-2a7f124414b35645049e9c1b125a6f0b470aa5ae.tar.xz | |
blkcg: move rcu_read_lock() outside of blkio_group get functions
rcu_read_lock() in throtl_get_tb() and cfq_get_cfqg() holds onto
@blkcg while looking up blkg. For API cleanup, the next patch will
make the caller responsible for determining @blkcg to look blkg from
and let them specify it as a parameter. Move rcu read locking out to
the callers to prepare for the change.
-v2: Originally this patch was described as a fix for RCU read locking
bug around @blkg, which Vivek pointed out to be incorrect. It
was from misunderstanding the role of rcu locking as protecting
@blkg not @blkcg. Patch description updated.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'lib/div64.c')
0 files changed, 0 insertions, 0 deletions