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authorSong Shuai <songshuaishuai@tinylab.org>2023-06-09 10:50:48 +0300
committerPalmer Dabbelt <palmer@rivosinc.com>2023-06-23 20:06:22 +0300
commit91afbaafd6b1f1846520efd2b158066a25a1a316 (patch)
treed65db65971e7f103cb5fbe71638cc8e316579949 /arch/riscv/kernel
parentb5e13f3ace78a8159dbad92bb005090a431e36d7 (diff)
downloadlinux-91afbaafd6b1f1846520efd2b158066a25a1a316.tar.xz
riscv: hibernate: remove WARN_ON in save_processor_state
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. Fixes: c0317210012e ("RISC-V: Add arch functions to support hibernation/suspend-to-disk") Signed-off-by: Song Shuai <songshuaishuai@tinylab.org> Reviewed-by: Conor Dooley <conor.dooley@microchip.com> Link: https://lore.kernel.org/r/20230609075049.2651723-4-songshuaishuai@tinylab.org Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Diffstat (limited to 'arch/riscv/kernel')
-rw-r--r--arch/riscv/kernel/hibernate.c1
1 files changed, 0 insertions, 1 deletions
diff --git a/arch/riscv/kernel/hibernate.c b/arch/riscv/kernel/hibernate.c
index 264b2dcdd67e..671b686c0158 100644
--- a/arch/riscv/kernel/hibernate.c
+++ b/arch/riscv/kernel/hibernate.c
@@ -80,7 +80,6 @@ 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)