[v2,18/44] cpuidle,intel_idle: Fix CPUIDLE_FLAG_IRQ_ENABLE *again*

Commit Message

Peter Zijlstra Sept. 19, 2022, 9:59 a.m. UTC

vmlinux.o: warning: objtool: intel_idle_irq+0x10c: call to trace_hardirqs_off() leaves .noinstr.text section

As per commit 32d4fd5751ea ("cpuidle,intel_idle: Fix
CPUIDLE_FLAG_IRQ_ENABLE"):

  "must not have tracing in idle functions"

Clearly people can't read and tinker along until splat dissapears.
This straight up reverts commit d295ad34f236 ("intel_idle: Fix false
positive RCU splats due to incorrect hardirqs state").

It doesn't re-introduce the problem because preceding patches fixed it
properly.

Fixes: d295ad34f236 ("intel_idle: Fix false positive RCU splats due to incorrect hardirqs state")
Signed-off-by: Peter Zijlstra (Intel) <[e-mail]>
---
 drivers/idle/intel_idle.c |    8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

Patch

--- a/drivers/idle/intel_idle.c
+++ b/drivers/idle/intel_idle.c
@@ -168,13 +168,7 @@  static __cpuidle int intel_idle_irq(stru
 
 	raw_local_irq_enable();
 	ret = __intel_idle(dev, drv, index);
-
-	/*
-	 * The lockdep hardirqs state may be changed to 'on' with timer
-	 * tick interrupt followed by __do_softirq(). Use local_irq_disable()
-	 * to keep the hardirqs state correct.
-	 */
-	local_irq_disable();
+	raw_local_irq_disable();
 
 	return ret;
 }