mirror of https://gitee.com/openkylin/linux.git
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mattst88/alpha
Pull alpha update from Matt Turner: "A single patch for alpha, one that enables ARCH_USE_CMPXCHG_LOCKREF and offers around an 8% performance improvement on a little benchmark that you wrote" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mattst88/alpha: alpha: select CONFIG_ARCH_USE_CMPXCHG_LOCKREF.
This commit is contained in:
commit
7b8067d370
|
@ -3,6 +3,7 @@ config ALPHA
|
|||
default y
|
||||
select ARCH_MIGHT_HAVE_PC_PARPORT
|
||||
select ARCH_MIGHT_HAVE_PC_SERIO
|
||||
select ARCH_USE_CMPXCHG_LOCKREF
|
||||
select HAVE_AOUT
|
||||
select HAVE_IDE
|
||||
select HAVE_OPROFILE
|
||||
|
|
|
@ -16,6 +16,11 @@
|
|||
#define arch_spin_unlock_wait(x) \
|
||||
do { cpu_relax(); } while ((x)->lock)
|
||||
|
||||
static inline int arch_spin_value_unlocked(arch_spinlock_t lock)
|
||||
{
|
||||
return lock.lock == 0;
|
||||
}
|
||||
|
||||
static inline void arch_spin_unlock(arch_spinlock_t * lock)
|
||||
{
|
||||
mb();
|
||||
|
|
Loading…
Reference in New Issue