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authorPaolo Bonzini <pbonzini@redhat.com>2017-08-01 18:24:06 +0300
committerIngo Molnar <mingo@kernel.org>2017-08-10 13:28:57 +0300
commitbe040bea9085a9c2b1700c9e60888777baeb96d5 (patch)
tree553fd82239ca9da9878bfef881e3d49d16dbcc06 /include/linux/cpuset.h
parent7a34bcb8b272b1300f0125c93a54f0c98812acdd (diff)
downloadlinux-be040bea9085a9c2b1700c9e60888777baeb96d5.tar.xz
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>
Diffstat (limited to 'include/linux/cpuset.h')
-rw-r--r--include/linux/cpuset.h6
1 files changed, 0 insertions, 6 deletions
diff --git a/include/linux/cpuset.h b/include/linux/cpuset.h
index 898cfe2eeb42..e74655d941b7 100644
--- a/include/linux/cpuset.h
+++ b/include/linux/cpuset.h
@@ -37,12 +37,6 @@ static inline bool cpusets_enabled(void)
return static_branch_unlikely(&cpusets_enabled_key);
}
-static inline int nr_cpusets(void)
-{
- /* jump label reference count + the top-level cpuset */
- return static_key_count(&cpusets_enabled_key.key) + 1;
-}
-
static inline void cpuset_inc(void)
{
static_branch_inc(&cpusets_pre_enable_key);