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-rw-r--r--kernel/softirq.c18
1 files changed, 18 insertions, 0 deletions
diff --git a/kernel/softirq.c b/kernel/softirq.c
index aab880677ce0..3789ca98197c 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -65,6 +65,7 @@ static inline void wakeup_softirqd(void)
* This one is for softirq.c-internal use,
* where hardirqs are disabled legitimately:
*/
+#ifdef CONFIG_TRACE_IRQFLAGS
static void __local_bh_disable(unsigned long ip)
{
unsigned long flags;
@@ -80,6 +81,13 @@ static void __local_bh_disable(unsigned long ip)
trace_softirqs_off(ip);
raw_local_irq_restore(flags);
}
+#else /* !CONFIG_TRACE_IRQFLAGS */
+static inline void __local_bh_disable(unsigned long ip)
+{
+ add_preempt_count(SOFTIRQ_OFFSET);
+ barrier();
+}
+#endif /* CONFIG_TRACE_IRQFLAGS */
void local_bh_disable(void)
{
@@ -121,12 +129,16 @@ EXPORT_SYMBOL(_local_bh_enable);
void local_bh_enable(void)
{
+#ifdef CONFIG_TRACE_IRQFLAGS
unsigned long flags;
WARN_ON_ONCE(in_irq());
+#endif
WARN_ON_ONCE(irqs_disabled());
+#ifdef CONFIG_TRACE_IRQFLAGS
local_irq_save(flags);
+#endif
/*
* Are softirqs going to be turned on now:
*/
@@ -142,18 +154,22 @@ void local_bh_enable(void)
do_softirq();
dec_preempt_count();
+#ifdef CONFIG_TRACE_IRQFLAGS
local_irq_restore(flags);
+#endif
preempt_check_resched();
}
EXPORT_SYMBOL(local_bh_enable);
void local_bh_enable_ip(unsigned long ip)
{
+#ifdef CONFIG_TRACE_IRQFLAGS
unsigned long flags;
WARN_ON_ONCE(in_irq());
local_irq_save(flags);
+#endif
/*
* Are softirqs going to be turned on now:
*/
@@ -169,7 +185,9 @@ void local_bh_enable_ip(unsigned long ip)
do_softirq();
dec_preempt_count();
+#ifdef CONFIG_TRACE_IRQFLAGS
local_irq_restore(flags);
+#endif
preempt_check_resched();
}
EXPORT_SYMBOL(local_bh_enable_ip);