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| author | Tejun Heo <tj@kernel.org> | 2014-06-28 16:10:12 +0400 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2014-06-28 16:10:12 +0400 |
| commit | d630dc4c9adb41e5bd1e06df2dbeaf622469ddd5 (patch) | |
| tree | 4dc8afb3469f6bb27f3737b48d398ea4fa10e3e6 /block/blk-sysfs.c | |
| parent | 55c6c814ae0aa896781d3c51e4608de542624f64 (diff) | |
| download | linux-d630dc4c9adb41e5bd1e06df2dbeaf622469ddd5.tar.xz | |
percpu-refcount: one bit is enough for REF_STATUS
percpu-refcount currently reserves two lowest bits of its percpu
pointer to indicate its state; however, only one bit is used for
PCPU_REF_DEAD.
Simplify it by removing PCPU_STATUS_BITS/MASK and testing
PCPU_REF_DEAD directly. This also allows the compiler to choose a
more efficient instruction depending on the architecture.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Kent Overstreet <kmo@daterainc.com>
Cc: Christoph Lameter <cl@linux-foundation.org>
Diffstat (limited to 'block/blk-sysfs.c')
0 files changed, 0 insertions, 0 deletions