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| author |   Nadav Amit <namit@vmware.com> | 2019-06-12 23:48:13 -0700 |
|---|---|---|
| committer |   Thomas Gleixner <tglx@linutronix.de> | 2019-06-23 14:07:23 +0200 |
| commit | dde3626f815e38bbf96fddd5185038c4b4d395a8 (patch) | |
| tree | b1f5afd13569b62d7b49da4f7e2a9dc1163db1bd /arch/x86/kernel/apic/apic_flat_64.c | |
| parent | x86/apic: Make apic_bsp_setup() static (diff) | |
| download | linux-dev-dde3626f815e38bbf96fddd5185038c4b4d395a8.tar.xz linux-dev-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/apic/apic_flat_64.c')
| -rw-r--r-- | arch/x86/kernel/apic/apic_flat_64.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/x86/kernel/apic/apic_flat_64.c b/arch/x86/kernel/apic/apic_flat_64.c index 0005c284a5c5..65072858f553 100644 --- a/arch/x86/kernel/apic/apic_flat_64.c +++ b/arch/x86/kernel/apic/apic_flat_64.c @@ -78,7 +78,7 @@ flat_send_IPI_mask_allbutself(const struct cpumask *cpumask, int vector) int cpu = smp_processor_id(); if (cpu < BITS_PER_LONG) - clear_bit(cpu, &mask); + __clear_bit(cpu, &mask); _flat_send_IPI_mask(mask, vector); } @@ -92,7 +92,7 @@ static void flat_send_IPI_allbutself(int vector) unsigned long mask = cpumask_bits(cpu_online_mask)[0]; if (cpu < BITS_PER_LONG) - clear_bit(cpu, &mask); + __clear_bit(cpu, &mask); _flat_send_IPI_mask(mask, vector); } |