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e7986739a7
Impact: cleanup, change parameter passing
* Change genapic interfaces to accept cpumask_t pointers where possible.
* Modify external callers to use cpumask_t pointers in function calls.
* Create new send_IPI_mask_allbutself which is the same as the
send_IPI_mask functions but removes smp_processor_id() from list.
This removes another common need for a temporary cpumask_t variable.
* Functions that used a temp cpumask_t variable for:
cpumask_t allbutme = cpu_online_map;
cpu_clear(smp_processor_id(), allbutme);
if (!cpus_empty(allbutme))
...
become:
if (!cpus_equal(cpu_online_map, cpumask_of_cpu(cpu)))
...
* Other minor code optimizations (like using cpus_clear instead of
CPU_MASK_NONE, etc.)
Applies to linux-2.6.tip/master.
Signed-off-by: Mike Travis <travis@sgi.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Acked-by: Ingo Molnar <mingo@elte.hu>
65 lines
1.6 KiB
C
65 lines
1.6 KiB
C
#ifndef _ASM_X86_MACH_DEFAULT_MACH_IPI_H
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#define _ASM_X86_MACH_DEFAULT_MACH_IPI_H
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/* Avoid include hell */
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#define NMI_VECTOR 0x02
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void send_IPI_mask_bitmask(const cpumask_t *mask, int vector);
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void send_IPI_mask_allbutself(const cpumask_t *mask, int vector);
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void __send_IPI_shortcut(unsigned int shortcut, int vector);
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extern int no_broadcast;
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#ifdef CONFIG_X86_64
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#include <asm/genapic.h>
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#define send_IPI_mask (genapic->send_IPI_mask)
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#define send_IPI_mask_allbutself (genapic->send_IPI_mask_allbutself)
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#else
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static inline void send_IPI_mask(const cpumask_t *mask, int vector)
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{
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send_IPI_mask_bitmask(mask, vector);
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}
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void send_IPI_mask_allbutself(const cpumask_t *mask, int vector);
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#endif
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static inline void __local_send_IPI_allbutself(int vector)
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{
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if (no_broadcast || vector == NMI_VECTOR)
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send_IPI_mask_allbutself(&cpu_online_map, vector);
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else
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__send_IPI_shortcut(APIC_DEST_ALLBUT, vector);
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}
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static inline void __local_send_IPI_all(int vector)
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{
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if (no_broadcast || vector == NMI_VECTOR)
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send_IPI_mask(&cpu_online_map, vector);
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else
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__send_IPI_shortcut(APIC_DEST_ALLINC, vector);
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}
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#ifdef CONFIG_X86_64
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#define send_IPI_allbutself (genapic->send_IPI_allbutself)
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#define send_IPI_all (genapic->send_IPI_all)
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#else
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static inline void send_IPI_allbutself(int vector)
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{
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/*
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* if there are no other CPUs in the system then we get an APIC send
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* error if we try to broadcast, thus avoid sending IPIs in this case.
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*/
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if (!(num_online_cpus() > 1))
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return;
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__local_send_IPI_allbutself(vector);
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return;
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}
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static inline void send_IPI_all(int vector)
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{
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__local_send_IPI_all(vector);
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}
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#endif
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#endif /* _ASM_X86_MACH_DEFAULT_MACH_IPI_H */
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