sched: Fix up scheduler syscall LTP fails

[firefly-linux-kernel-4.4.55.git] / kernel / softirq.c

diff --git a/kernel/softirq.c b/kernel/softirq.c
index 11025ccc06dd1e2211ca62dcbcea7ce1b05418dd..9e368ef35f9a7e5d706abf35fb85fee2a73a8c45 100644 (file)
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -89,7 +89,7 @@ static void wakeup_softirqd(void)
  * where hardirqs are disabled legitimately:
  */
 #ifdef CONFIG_TRACE_IRQFLAGS
-static void __local_bh_disable(unsigned long ip, unsigned int cnt)
+void __local_bh_disable_ip(unsigned long ip, unsigned int cnt)
 {
        unsigned long flags;
 
@@ -107,33 +107,21 @@ static void __local_bh_disable(unsigned long ip, unsigned int cnt)
        /*
         * Were softirqs turned off above:
         */
-       if (softirq_count() == cnt)
+       if (softirq_count() == (cnt & SOFTIRQ_MASK))
                trace_softirqs_off(ip);
        raw_local_irq_restore(flags);
 
        if (preempt_count() == cnt)
                trace_preempt_off(CALLER_ADDR0, get_parent_ip(CALLER_ADDR1));
 }
-#else /* !CONFIG_TRACE_IRQFLAGS */
-static inline void __local_bh_disable(unsigned long ip, unsigned int cnt)
-{
-       preempt_count_add(cnt);
-       barrier();
-}
+EXPORT_SYMBOL(__local_bh_disable_ip);
 #endif /* CONFIG_TRACE_IRQFLAGS */
 
-void local_bh_disable(void)
-{
-       __local_bh_disable(_RET_IP_, SOFTIRQ_DISABLE_OFFSET);
-}
-
-EXPORT_SYMBOL(local_bh_disable);
-
 static void __local_bh_enable(unsigned int cnt)
 {
        WARN_ON_ONCE(!irqs_disabled());
 
-       if (softirq_count() == cnt)
+       if (softirq_count() == (cnt & SOFTIRQ_MASK))
                trace_softirqs_on(_RET_IP_);
        preempt_count_sub(cnt);
 }
@@ -151,7 +139,7 @@ void _local_bh_enable(void)
 
 EXPORT_SYMBOL(_local_bh_enable);
 
-static inline void _local_bh_enable_ip(unsigned long ip)
+void __local_bh_enable_ip(unsigned long ip, unsigned int cnt)
 {
        WARN_ON_ONCE(in_irq() || irqs_disabled());
 #ifdef CONFIG_TRACE_IRQFLAGS
@@ -166,7 +154,7 @@ static inline void _local_bh_enable_ip(unsigned long ip)
         * Keep preemption disabled until we are done with
         * softirq processing:
         */
-       preempt_count_sub(SOFTIRQ_DISABLE_OFFSET - 1);
+       preempt_count_sub(cnt - 1);
 
        if (unlikely(!in_interrupt() && local_softirq_pending())) {
                /*
@@ -182,18 +170,7 @@ static inline void _local_bh_enable_ip(unsigned long ip)
 #endif
        preempt_check_resched();
 }
-
-void local_bh_enable(void)
-{
-       _local_bh_enable_ip(_RET_IP_);
-}
-EXPORT_SYMBOL(local_bh_enable);
-
-void local_bh_enable_ip(unsigned long ip)
-{
-       _local_bh_enable_ip(ip);
-}
-EXPORT_SYMBOL(local_bh_enable_ip);
+EXPORT_SYMBOL(__local_bh_enable_ip);
 
 /*
  * We restart softirq processing for at most MAX_SOFTIRQ_RESTART times,
@@ -230,7 +207,7 @@ asmlinkage void __do_softirq(void)
        pending = local_softirq_pending();
        account_irq_enter_time(current);
 
-       __local_bh_disable(_RET_IP_, SOFTIRQ_OFFSET);
+       __local_bh_disable_ip(_RET_IP_, SOFTIRQ_OFFSET);
        lockdep_softirq_enter();
 
        cpu = smp_processor_id();