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arm64: move smp_send_stop() cpu mask off stack

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For really large values of CONFIG_NR_CPUS, a CPU mask value should
not be put on the stack:

arch/arm64/kernel/smp.c:1188:1: error: the frame size of 8544 bytes is larger than 1536 bytes [-Werror=frame-larger-than=]

This could be achieved using alloc_cpumask_var(), which makes it
depend on CONFIG_CPUMASK_OFFSTACK, but as this function is already
serialized and can only run on one CPU, making the variable 'static'
is easier.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Link: https://lore.kernel.org/r/20250620111045.3364827-1-arnd@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Arnd Bergmann 2025-06-20 13:10:41 +02:00 committed by Will Deacon
parent 0d1c86b840
commit 6c66bb655c
1 changed files with 1 additions and 1 deletions
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arch/arm64/kernel/smp.c
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@ -1143,7 +1143,7 @@ static inline unsigned int num_other_online_cpus(void)
void smp_send_stop(void)
{
static unsigned long stop_in_progress;
cpumask_t mask;
static cpumask_t mask;
unsigned long timeout;
/*