* Oleg Nesterov <[email protected]> wrote:
> Turn DEFINE_STATIC_PERCPU_RWSEM() into __DEFINE_PERCPU_RWSEM() with the > additional "is_static" argument to introduce DEFINE_PERCPU_RWSEM(). > > Change cgroup.c to use DEFINE_PERCPU_RWSEM(cgroup_threadgroup_rwsem). > > Signed-off-by: Oleg Nesterov <[email protected]> > --- > include/linux/percpu-rwsem.h | 8 ++++++-- > kernel/cgroup/cgroup.c | 3 +-- > 2 files changed, 7 insertions(+), 4 deletions(-) > > diff --git a/include/linux/percpu-rwsem.h b/include/linux/percpu-rwsem.h > index 6887636..2809b44 100644 > --- a/include/linux/percpu-rwsem.h > +++ b/include/linux/percpu-rwsem.h > @@ -17,14 +17,18 @@ struct percpu_rw_semaphore { > int readers_block; > }; > > -#define DEFINE_STATIC_PERCPU_RWSEM(name) \ > +#define __DEFINE_PERCPU_RWSEM(name, is_static) > \ > static DEFINE_PER_CPU(unsigned int, __percpu_rwsem_rc_##name); > \ > -static struct percpu_rw_semaphore name = { \ > +is_static struct percpu_rw_semaphore name = { > \ > .rss = __RCU_SYNC_INITIALIZER(name.rss), \ > .read_count = &__percpu_rwsem_rc_##name, \ > .rw_sem = __RWSEM_INITIALIZER(name.rw_sem), \ > .writer = __RCUWAIT_INITIALIZER(name.writer), \ > } > +#define DEFINE_PERCPU_RWSEM(name) \ > + __DEFINE_PERCPU_RWSEM(name, /* not static */) > +#define DEFINE_STATIC_PERCPU_RWSEM(name) \ > + __DEFINE_PERCPU_RWSEM(name, static) Which tree is this against? It doesn't apply to tip:master nor latest -git. Thanks, Ingo
