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| author | Thomas Gleixner <tglx@linutronix.de> | 2019-07-22 20:47:23 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2019-07-25 16:12:00 +0200 |
| commit | 22ca7ee933a39f542ff6f81fc64f8036eff56519 (patch) | |
| tree | eb53bd053af83574b3c3f9424b8fe0385a1df4c2 /arch/x86/kernel/apic | |
| parent | 6a1cb5f5c6413222b8532722562dd1edb5fdfd38 (diff) | |
| download | linux-22ca7ee933a39f542ff6f81fc64f8036eff56519.tar.bz2 | |
x86/apic: Provide and use helper for send_IPI_allbutself()
To support IPI shorthands wrap invocations of apic->send_IPI_allbutself()
in a helper function, so the static key controlling the shorthand mode is
only in one place.
Fixup all callers.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20190722105220.492691679@linutronix.de
Diffstat (limited to 'arch/x86/kernel/apic')
| -rw-r--r-- | arch/x86/kernel/apic/ipi.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/x86/kernel/apic/ipi.c b/arch/x86/kernel/apic/ipi.c index 5bd8a001a887..f53de3e0145e 100644 --- a/arch/x86/kernel/apic/ipi.c +++ b/arch/x86/kernel/apic/ipi.c @@ -50,6 +50,18 @@ void apic_smt_update(void) static_branch_enable(&apic_use_ipi_shorthand); } } + +void apic_send_IPI_allbutself(unsigned int vector) +{ + if (num_online_cpus() < 2) + return; + + if (static_branch_likely(&apic_use_ipi_shorthand)) + apic->send_IPI_allbutself(vector); + else + apic->send_IPI_mask_allbutself(cpu_online_mask, vector); +} + #endif /* CONFIG_SMP */ static inline int __prepare_ICR2(unsigned int mask) |