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ihk_mc_spinlock_lock_noirq() / ihk_mc_spinlock_unlock_noirq() implementation

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This commit is contained in:
Balazs Gerofi bgerofi@riken.jp
2013-05-10 12:43:13 +09:00
parent 4a94b1d9a2
commit bdebcf4b48
1 changed files with 16 additions and 5 deletions
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21
arch/x86/kernel/include/arch-lock.h
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@ -22,13 +22,10 @@ static void ihk_mc_spinlock_init(ihk_spinlock_t *lock)
} }
#define SPIN_LOCK_UNLOCKED 0 #define SPIN_LOCK_UNLOCKED 0
static unsigned long ihk_mc_spinlock_lock(ihk_spinlock_t *lock) static void ihk_mc_spinlock_lock_noirq(ihk_spinlock_t *lock)
{ {
int inc = 0x00010000; int inc = 0x00010000;
int tmp; int tmp;
unsigned long flags;
flags = cpu_disable_interrupt_save();
#if 0 #if 0
asm volatile("lock ; xaddl %0, %1\n" asm volatile("lock ; xaddl %0, %1\n"
@ -66,13 +63,27 @@ static unsigned long ihk_mc_spinlock_lock(ihk_spinlock_t *lock)
#ifdef DEBUG_SPINLOCK #ifdef DEBUG_SPINLOCK
__kprintf("[%d] holding lock: 0x%lX\n", ihk_mc_get_processor_id(), lock); __kprintf("[%d] holding lock: 0x%lX\n", ihk_mc_get_processor_id(), lock);
#endif #endif
}
static unsigned long ihk_mc_spinlock_lock(ihk_spinlock_t *lock)
{
unsigned long flags;
flags = cpu_disable_interrupt_save();
ihk_mc_spinlock_lock_noirq(lock);
return flags; return flags;
} }
static void ihk_mc_spinlock_unlock(ihk_spinlock_t *lock, unsigned long flags) static void ihk_mc_spinlock_unlock_noirq(ihk_spinlock_t *lock)
{ {
asm volatile ("lock incw %0" : "+m"(*lock) : : "memory", "cc"); asm volatile ("lock incw %0" : "+m"(*lock) : : "memory", "cc");
}
static void ihk_mc_spinlock_unlock(ihk_spinlock_t *lock, unsigned long flags)
{
ihk_mc_spinlock_unlock_noirq(lock);
cpu_restore_interrupt(flags); cpu_restore_interrupt(flags);
#ifdef DEBUG_SPINLOCK #ifdef DEBUG_SPINLOCK