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| author | Nadav Amit <namit@vmware.com> | 2019-06-13 08:48:13 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2019-06-23 14:07:23 +0200 |
| commit | dde3626f815e38bbf96fddd5185038c4b4d395a8 (patch) | |
| tree | b1f5afd13569b62d7b49da4f7e2a9dc1163db1bd /arch/x86/kernel/smp.c | |
| parent | x86/apic: Make apic_bsp_setup() static (diff) | |
| download | linux-dde3626f815e38bbf96fddd5185038c4b4d395a8.tar.xz linux-dde3626f815e38bbf96fddd5185038c4b4d395a8.zip | |
x86/apic: Use non-atomic operations when possible
Using __clear_bit() and __cpumask_clear_cpu() is more efficient than using
their atomic counterparts.
Use them when atomicity is not needed, such as when manipulating bitmasks
that are on the stack.
Signed-off-by: Nadav Amit <namit@vmware.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Link: https://lkml.kernel.org/r/20190613064813.8102-10-namit@vmware.com
Diffstat (limited to 'arch/x86/kernel/smp.c')
| -rw-r--r-- | arch/x86/kernel/smp.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kernel/smp.c b/arch/x86/kernel/smp.c index 04adc8d60aed..acddd988602d 100644 --- a/arch/x86/kernel/smp.c +++ b/arch/x86/kernel/smp.c @@ -146,7 +146,7 @@ void native_send_call_func_ipi(const struct cpumask *mask) } cpumask_copy(allbutself, cpu_online_mask); - cpumask_clear_cpu(smp_processor_id(), allbutself); + __cpumask_clear_cpu(smp_processor_id(), allbutself); if (cpumask_equal(mask, allbutself) && cpumask_equal(cpu_online_mask, cpu_callout_mask)) |