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From:   Song Shuai <songshuaishuai@tinylab.org>
To:     catalin.marinas@arm.com, will@kernel.org, paul.walmsley@sifive.com,
        palmer@dabbelt.com, aou@eecs.berkeley.edu, chris@zankel.net,
        jcmvbkbc@gmail.com, songshuaishuai@tinylab.org,
        steven.price@arm.com, vincenzo.frascino@arm.com,
        leyfoon.tan@starfivetech.com, mason.huo@starfivetech.com,
        jeeheng.sia@starfivetech.com, conor.dooley@microchip.com,
        ajones@ventanamicro.com
Cc:     linux@armlinux.org.uk, linux-arm-kernel@lists.infradead.org,
        linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org
Subject: [PATCH V2 0/4] Remove WARN_ON in save_processor_state
Date:   Fri,  9 Jun 2023 15:50:45 +0800
Message-Id: <20230609075049.2651723-1-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
for ARM,arm64,riscv,xtensa architechtures.

Changes since V1:
https://lore.kernel.org/linux-riscv/20230525025555.24104-1-songshuaishuai@tinylab.org/
- supplement the case of CONFIG_PM_SLEEP_SMP=n in commit message as Will suggests

Song Shuai (4):
  ARM: hibernate: remove WARN_ON in save_processor_state
  arm64: hibernate: remove WARN_ON in save_processor_state
  riscv: hibernate: remove WARN_ON in save_processor_state
  xtensa: hibernate: remove WARN_ON in save_processor_state

 arch/arm/kernel/hibernate.c    | 1 -
 arch/arm64/kernel/hibernate.c  | 1 -
 arch/riscv/kernel/hibernate.c  | 1 -
 arch/xtensa/kernel/hibernate.c | 1 -
 4 files changed, 4 deletions(-)

-- 
2.20.1