irq: Don't re-enable interrupts at the end of irq_exit
Commit 74eed0163d0def3fce27228d9ccf3d36e207b286
"irq: Ensure irq_exit() code runs with interrupts disabled"
restore interrupts flags in the end of irq_exit() for archs
that don't define __ARCH_IRQ_EXIT_IRQS_DISABLED.
However always returning from irq_exit() with interrupts
disabled should not be a problem for these archs. Prior to
this commit this was already happening anytime we processed
pending softirqs anyway.
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
diff --git a/kernel/softirq.c b/kernel/softirq.c
index f42ff97..dce38fa 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -334,9 +334,7 @@
void irq_exit(void)
{
#ifndef __ARCH_IRQ_EXIT_IRQS_DISABLED
- unsigned long flags;
-
- local_irq_save(flags);
+ local_irq_disable();
#else
WARN_ON_ONCE(!irqs_disabled());
#endif
@@ -353,9 +351,6 @@
tick_nohz_irq_exit();
#endif
rcu_irq_exit();
-#ifndef __ARCH_IRQ_EXIT_IRQS_DISABLED
- local_irq_restore(flags);
-#endif
}
/*