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powerpc/64: Don't call trace_hardirqs_on() in prep_irq_for_idle()

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Since commit a01353cf18 ("cpuidle: Fix ct_idle_*() usage"), the
cpuidle entry code calls trace_hardirqs_on() (actually
trace_hardirqs_on_prepare()) in ct_cpuidle_enter() before calling into
the cpuidle driver.

Suggested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230406144535.3786008-2-mpe@ellerman.id.au
This commit is contained in:
Michael Ellerman 2023-04-07 00:45:33 +10:00
parent 7640854d96
commit 6fee130204
1 changed files with 2 additions and 6 deletions
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8
arch/powerpc/kernel/irq_64.c
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@ -348,9 +348,8 @@ EXPORT_SYMBOL(arch_local_irq_restore);
* already the case when ppc_md.power_save is called). The function
* will return whether to enter power save or just return.
*
* In the former case, it will have notified lockdep of interrupts
* being re-enabled and generally sanitized the lazy irq state,
* and in the latter case it will leave with interrupts hard
* In the former case, it will have generally sanitized the lazy irq
* state, and in the latter case it will leave with interrupts hard
* disabled and marked as such, so the local_irq_enable() call
* in arch_cpu_idle() will properly re-enable everything.
*/
@ -370,9 +369,6 @@ __cpuidle bool prep_irq_for_idle(void)
if (lazy_irq_pending())
return false;
/* Tell lockdep we are about to re-enable */
trace_hardirqs_on();
/*
* Mark interrupts as soft-enabled and clear the
* PACA_IRQ_HARD_DIS from the pending mask since we