cpuset: Make nr_cpusets private
authorPaolo Bonzini <pbonzini@redhat.com>
Tue, 1 Aug 2017 15:24:06 +0000 (17:24 +0200)
committerIngo Molnar <mingo@kernel.org>
Thu, 10 Aug 2017 10:28:57 +0000 (12:28 +0200)
commitbe040bea9085a9c2b1700c9e60888777baeb96d5
tree553fd82239ca9da9878bfef881e3d49d16dbcc06
parent7a34bcb8b272b1300f0125c93a54f0c98812acdd
cpuset: Make nr_cpusets private

Any use of key->enabled (that is static_key_enabled and static_key_count)
outside jump_label_lock should handle its own serialization.  In the case
of cpusets_enabled_key, the key is always incremented/decremented under
cpuset_mutex, and hence the same rule applies to nr_cpusets.  The rule
*is* respected currently, but the mutex is static so nr_cpusets should
be static too.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Zefan Li <lizefan@huawei.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1501601046-35683-4-git-send-email-pbonzini@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
include/linux/cpuset.h
kernel/cgroup/cpuset.c