diff options
| author | Shrikanth Hegde <sshegde@linux.ibm.com> | 2026-03-24 01:06:29 +0530 |
|---|---|---|
| committer | Thomas Gleixner <tglx@kernel.org> | 2026-03-25 20:11:30 +0100 |
| commit | ec39780d6a9e05e7e427008603b40efef515b775 (patch) | |
| tree | eb5d63ad1952732896dc375c62013b3da9afd6ac /kernel | |
| parent | cc5623947f3d86687c39771fcbea641907966d5c (diff) | |
smp: Get this_cpu once in smp_call_function
smp_call_function_single() and smp_call_function_many_cond() disable
preemption and cache the CPU number via get_cpu().
Use this cached value throughout the function instead of invoking
smp_processor_id() again.
[ tglx: Make the copy&pasta'ed change log match the patch ]
Signed-off-by: Shrikanth Hegde <sshegde@linux.ibm.com>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Reviewed-by: Mukesh Kumar Chaurasiya (IBM) <mkchauras@gmail.com>
Link: https://patch.msgid.link/20260323193630.640311-4-sshegde@linux.ibm.com
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/smp.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/smp.c b/kernel/smp.c index b179424f6040..bdbf145737ba 100644 --- a/kernel/smp.c +++ b/kernel/smp.c @@ -678,7 +678,7 @@ int smp_call_function_single(int cpu, smp_call_func_t func, void *info, csd->func = func; csd->info = info; #ifdef CONFIG_CSD_LOCK_WAIT_DEBUG - csd->node.src = smp_processor_id(); + csd->node.src = this_cpu; csd->node.dst = cpu; #endif @@ -833,7 +833,7 @@ static void smp_call_function_many_cond(const struct cpumask *mask, csd->func = func; csd->info = info; #ifdef CONFIG_CSD_LOCK_WAIT_DEBUG - csd->node.src = smp_processor_id(); + csd->node.src = this_cpu; csd->node.dst = cpu; #endif trace_csd_queue_cpu(cpu, _RET_IP_, func, csd); |