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From:   Song Shuai <songshuaishuai@tinylab.org>
To:     catalin.marinas@arm.com, will@kernel.org, paul.walmsley@sifive.com,
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Cc:     linux@armlinux.org.uk, linux-arm-kernel@lists.infradead.org,
        linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org
Subject: [PATCH V2 2/4] arm64: hibernate: remove WARN_ON in save_processor_state
Date:   Fri,  9 Jun 2023 15:50:47 +0800
Message-Id: <20230609075049.2651723-3-songshuaishuai@tinylab.org>
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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