patch-2.4.6 linux/include/asm-i386/softirq.h
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- Lines: 50
- Date:
Tue Jul 3 15:42:55 2001
- Orig file:
v2.4.5/linux/include/asm-i386/softirq.h
- Orig date:
Fri May 25 18:01:27 2001
diff -u --recursive --new-file v2.4.5/linux/include/asm-i386/softirq.h linux/include/asm-i386/softirq.h
@@ -4,12 +4,46 @@
#include <asm/atomic.h>
#include <asm/hardirq.h>
-#define cpu_bh_disable(cpu) do { local_bh_count(cpu)++; barrier(); } while (0)
-#define cpu_bh_enable(cpu) do { barrier(); local_bh_count(cpu)--; } while (0)
+#define __cpu_bh_enable(cpu) \
+ do { barrier(); local_bh_count(cpu)--; } while (0)
+#define cpu_bh_disable(cpu) \
+ do { local_bh_count(cpu)++; barrier(); } while (0)
#define local_bh_disable() cpu_bh_disable(smp_processor_id())
-#define local_bh_enable() cpu_bh_enable(smp_processor_id())
+#define __local_bh_enable() __cpu_bh_enable(smp_processor_id())
+#define __cpu_raise_softirq(cpu,nr) set_bit((nr), &softirq_pending(cpu));
+#define raise_softirq(nr) __cpu_raise_softirq(smp_processor_id(), (nr))
#define in_softirq() (local_bh_count(smp_processor_id()) != 0)
+
+/*
+ * NOTE: this assembly code assumes:
+ *
+ * (char *)&local_bh_count - 8 == (char *)&softirq_pending
+ *
+ * If you change the offsets in irq_stat then you have to
+ * update this code as well.
+ */
+#define local_bh_enable() \
+do { \
+ unsigned int *ptr = &local_bh_count(smp_processor_id()); \
+ \
+ if (!--*ptr) \
+ __asm__ __volatile__ ( \
+ "cmpl $0, -8(%0);" \
+ "jnz 2f;" \
+ "1:;" \
+ \
+ ".section .text.lock,\"ax\";" \
+ "2: pushl %%eax; pushl %%ecx; pushl %%edx;" \
+ "call %c1;" \
+ "popl %%edx; popl %%ecx; popl %%eax;" \
+ "jmp 1b;" \
+ ".previous;" \
+ \
+ : /* no output */ \
+ : "r" (ptr), "i" (do_softirq) \
+ /* no registers clobbered */ ); \
+} while (0)
#endif /* __ASM_SOFTIRQ_H */
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