Messages in this thread Patch in this message | | | From | Song Shuai <> | Subject | [PATCH V2 2/4] arm64: hibernate: remove WARN_ON in save_processor_state | Date | Fri, 9 Jun 2023 15:50:47 +0800 |
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During hibernation or restoration, freeze_secondary_cpus checks num_online_cpus via BUG_ON, and the subsequent save_processor_state also does the checking with WARN_ON.
In the case of CONFIG_PM_SLEEP_SMP=n, freeze_secondary_cpus is not defined, but the sole possible condition to disable CONFIG_PM_SLEEP_SMP is !SMP where num_online_cpus is always 1. We also don't have to check it in save_processor_state.
So remove the unnecessary checking in save_processor_state.
Signed-off-by: Song Shuai <songshuaishuai@tinylab.org> --- arch/arm64/kernel/hibernate.c | 1 - 1 file changed, 1 deletion(-)
diff --git a/arch/arm64/kernel/hibernate.c b/arch/arm64/kernel/hibernate.c index 788597a6b6a2..02870beb271e 100644 --- a/arch/arm64/kernel/hibernate.c +++ b/arch/arm64/kernel/hibernate.c @@ -99,7 +99,6 @@ int pfn_is_nosave(unsigned long pfn) void notrace save_processor_state(void) { - WARN_ON(num_online_cpus() != 1); } void notrace restore_processor_state(void) -- 2.20.1
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