diff options
| author |   Rusty Russell <rusty@rustcorp.com.au> | 2009-11-17 14:27:27 -0800 |
|---|---|---|
| committer |   Thomas Gleixner <tglx@linutronix.de> | 2009-11-18 14:52:25 +0100 |
| commit | 2ea6dec4a22a6f66f6633876212fd4d195cf8277 (patch) | |
| tree | f630c63a9e20fab5b31caa88368293a203103408 /include/linux/smp.h | |
| parent | generic-ipi: Fix misleading smp_call_function*() description (diff) | |
| download | linux-dev-2ea6dec4a22a6f66f6633876212fd4d195cf8277.tar.xz linux-dev-2ea6dec4a22a6f66f6633876212fd4d195cf8277.zip | |
generic-ipi: Add smp_call_function_any()
Andrew points out that acpi-cpufreq uses cpumask_any, when it really
would prefer to use the same CPU if possible (to avoid an IPI). In
general, this seems a good idea to offer.
[ tglx: Documented selection preference and Inlined the UP case to
avoid the copy of smp_call_function_single() and the extra
EXPORT ]
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Cc: Len Brown <len.brown@intel.com>
Cc: Zhao Yakui <yakui.zhao@intel.com>
Cc: Dave Jones <davej@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Mike Galbraith <efault@gmx.de>
Cc: "Zhang, Yanmin" <yanmin_zhang@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include/linux/smp.h')
| -rw-r--r-- | include/linux/smp.h | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/include/linux/smp.h b/include/linux/smp.h index 39c64bae776d..7a0570e6a596 100644 --- a/include/linux/smp.h +++ b/include/linux/smp.h @@ -76,6 +76,9 @@ void smp_call_function_many(const struct cpumask *mask, void __smp_call_function_single(int cpuid, struct call_single_data *data, int wait); +int smp_call_function_any(const struct cpumask *mask, + void (*func)(void *info), void *info, int wait); + /* * Generic and arch helpers */ @@ -137,9 +140,15 @@ static inline void smp_send_reschedule(int cpu) { } #define smp_prepare_boot_cpu() do {} while (0) #define smp_call_function_many(mask, func, info, wait) \ (up_smp_call_function(func, info)) -static inline void init_call_single_data(void) +static inline void init_call_single_data(void) { } + +static inline int +smp_call_function_any(const struct cpumask *mask, void (*func)(void *info), + void *info, int wait) { + return smp_call_function_single(0, func, info, wait); } + #endif /* !SMP */ /* |