patch-2.4.13 linux/include/linux/spinlock.h

• Lines: 11
• Date: Tue Oct 23 21:59:06 2001
• Orig file: v2.4.12/linux/include/linux/spinlock.h
• Orig date: Thu Oct 18 13:47:37 2001

diff -u --recursive --new-file v2.4.12/linux/include/linux/spinlock.h linux/include/linux/spinlock.h
@@ -30,6 +30,10 @@
 #define write_unlock_irqrestore(lock, flags)	do { write_unlock(lock); local_irq_restore(flags); } while (0)
 #define write_unlock_irq(lock)			do { write_unlock(lock); local_irq_enable();       } while (0)
 #define write_unlock_bh(lock)			do { write_unlock(lock); local_bh_enable();        } while (0)
+#define spin_trylock_bh(lock)			({ int __r; local_bh_disable();\
+						__r = spin_trylock(lock);      \
+						if (!__r) local_bh_enable();   \
+						__r; })
 
 #ifdef CONFIG_SMP
 #include <asm/spinlock.h>