diff options
-rw-r--r-- | arch/Kconfig | 3 | ||||
-rw-r--r-- | arch/s390/Kconfig | 1 | ||||
-rw-r--r-- | kernel/mutex.c | 3 |
3 files changed, 6 insertions, 1 deletions
diff --git a/arch/Kconfig b/arch/Kconfig index dc81b34c5d82..78a35e9dc104 100644 --- a/arch/Kconfig +++ b/arch/Kconfig | |||
@@ -109,3 +109,6 @@ config HAVE_CLK | |||
109 | 109 | ||
110 | config HAVE_DMA_API_DEBUG | 110 | config HAVE_DMA_API_DEBUG |
111 | bool | 111 | bool |
112 | |||
113 | config HAVE_DEFAULT_NO_SPIN_MUTEXES | ||
114 | bool | ||
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index dcb667c4375a..2eca5fe0e75b 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig | |||
@@ -82,6 +82,7 @@ config S390 | |||
82 | select USE_GENERIC_SMP_HELPERS if SMP | 82 | select USE_GENERIC_SMP_HELPERS if SMP |
83 | select HAVE_SYSCALL_WRAPPERS | 83 | select HAVE_SYSCALL_WRAPPERS |
84 | select HAVE_FUNCTION_TRACER | 84 | select HAVE_FUNCTION_TRACER |
85 | select HAVE_DEFAULT_NO_SPIN_MUTEXES | ||
85 | select HAVE_OPROFILE | 86 | select HAVE_OPROFILE |
86 | select HAVE_KPROBES | 87 | select HAVE_KPROBES |
87 | select HAVE_KRETPROBES | 88 | select HAVE_KRETPROBES |
diff --git a/kernel/mutex.c b/kernel/mutex.c index 5d79781394a3..507cf2b5e9f1 100644 --- a/kernel/mutex.c +++ b/kernel/mutex.c | |||
@@ -148,7 +148,8 @@ __mutex_lock_common(struct mutex *lock, long state, unsigned int subclass, | |||
148 | 148 | ||
149 | preempt_disable(); | 149 | preempt_disable(); |
150 | mutex_acquire(&lock->dep_map, subclass, 0, ip); | 150 | mutex_acquire(&lock->dep_map, subclass, 0, ip); |
151 | #if defined(CONFIG_SMP) && !defined(CONFIG_DEBUG_MUTEXES) | 151 | #if defined(CONFIG_SMP) && !defined(CONFIG_DEBUG_MUTEXES) && \ |
152 | !defined(CONFIG_HAVE_DEFAULT_NO_SPIN_MUTEXES) | ||
152 | /* | 153 | /* |
153 | * Optimistic spinning. | 154 | * Optimistic spinning. |
154 | * | 155 | * |