diff options
| author | Peter Zijlstra <peterz@infradead.org> | 2015-09-05 17:55:05 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-09-11 08:50:12 +0300 |
| commit | a6b277857fd2c990bc208ca1958d3f34d26052f7 (patch) | |
| tree | 6d0095d2e38945130bb730b70ca1f98b17759238 /arch | |
| parent | 43b3f02899f74ae9914a39547cc5492156f0027a (diff) | |
| download | linux-a6b277857fd2c990bc208ca1958d3f34d26052f7.tar.xz | |
locking/qspinlock/x86: Only emit the test-and-set fallback when building guest support
Only emit the test-and-set fallback for Hypervisors lacking
PARAVIRT_SPINLOCKS support when building for guests.
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Cc: stable@vger.kernel.org # 4.2
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/include/asm/qspinlock.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/x86/include/asm/qspinlock.h b/arch/x86/include/asm/qspinlock.h index 8dde3bdc4a05..eaba08076030 100644 --- a/arch/x86/include/asm/qspinlock.h +++ b/arch/x86/include/asm/qspinlock.h @@ -39,8 +39,8 @@ static inline void queued_spin_unlock(struct qspinlock *lock) } #endif +#ifdef CONFIG_PARAVIRT #define virt_spin_lock virt_spin_lock - static inline bool virt_spin_lock(struct qspinlock *lock) { if (!static_cpu_has(X86_FEATURE_HYPERVISOR)) @@ -59,6 +59,7 @@ static inline bool virt_spin_lock(struct qspinlock *lock) return true; } +#endif /* CONFIG_PARAVIRT */ #include <asm-generic/qspinlock.h> |