[PATCH] BUILD_LOCK_OPS: cleanup preempt_disable() usage

[linux-2.6-omap-h63xx.git] / kernel / spinlock.c

diff --git a/kernel/spinlock.c b/kernel/spinlock.c
index 0375fcd5921df5fe390ec6a3f1c1ce402d240f80..d1b810782bc4e1b643faac72733074e2dc492fa4 100644 (file)
--- a/kernel/spinlock.c
+++ b/kernel/spinlock.c
@@ -179,16 +179,16 @@ EXPORT_SYMBOL(_write_lock);
 #define BUILD_LOCK_OPS(op, locktype)                                   \
 void __lockfunc _##op##_lock(locktype##_t *lock)                       \
 {                                                                      \
-       preempt_disable();                                              \
        for (;;) {                                                      \
+               preempt_disable();                                      \
                if (likely(_raw_##op##_trylock(lock)))                  \
                        break;                                          \
                preempt_enable();                                       \
+                                                                       \
                if (!(lock)->break_lock)                                \
                        (lock)->break_lock = 1;                         \
                while (!op##_can_lock(lock) && (lock)->break_lock)      \
                        cpu_relax();                                    \
-               preempt_disable();                                      \
        }                                                               \
        (lock)->break_lock = 0;                                         \
 }                                                                      \
@@ -199,19 +199,18 @@ unsigned long __lockfunc _##op##_lock_irqsave(locktype##_t *lock) \
 {                                                                      \
        unsigned long flags;                                            \
                                                                        \
-       preempt_disable();                                              \
        for (;;) {                                                      \
+               preempt_disable();                                      \
                local_irq_save(flags);                                  \
                if (likely(_raw_##op##_trylock(lock)))                  \
                        break;                                          \
                local_irq_restore(flags);                               \
-                                                                       \
                preempt_enable();                                       \
+                                                                       \
                if (!(lock)->break_lock)                                \
                        (lock)->break_lock = 1;                         \
                while (!op##_can_lock(lock) && (lock)->break_lock)      \
                        cpu_relax();                                    \
-               preempt_disable();                                      \
        }                                                               \
        (lock)->break_lock = 0;                                         \
        return flags;                                                   \