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| author |   Heiko Carstens <heiko.carstens@de.ibm.com> | 2006-02-17 13:52:46 -0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@g5.osdl.org> | 2006-02-17 13:59:26 -0800 |
| commit | 255acee706b333b79f593dd366f16e1f107cccc3 (patch) | |
| tree | 47c68487eda1df3bf026444045106301bd3a3ff5 /include/asm-s390 | |
| parent | [PATCH] s390: fix preempt_count of idle thread with cpu hotplug (diff) | |
| download | linux-dev-255acee706b333b79f593dd366f16e1f107cccc3.tar.xz linux-dev-255acee706b333b79f593dd366f16e1f107cccc3.zip | |
[PATCH] s390: additional_cpus parameter
Introduce additional_cpus command line option. By default no additional cpu
can be attached to the system anymore. Only the cpus present at IPL time can
be switched on/off. If it is desired that additional cpus can be attached to
the system the maximum number of additional cpus needs to be specified with
this option.
This change is necessary in order to limit the waste of per_cpu data
structures.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-s390')
| -rw-r--r-- | include/asm-s390/smp.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/asm-s390/smp.h b/include/asm-s390/smp.h index 9c6e9c300eb9..444dae5912e6 100644 --- a/include/asm-s390/smp.h +++ b/include/asm-s390/smp.h @@ -31,6 +31,7 @@ typedef struct __u16 cpu; } sigp_info; +extern void smp_setup_cpu_possible_map(void); extern int smp_call_function_on(void (*func) (void *info), void *info, int nonatomic, int wait, int cpu); #define NO_PROC_ID 0xFF /* No processor magic marker */ @@ -104,6 +105,7 @@ smp_call_function_on(void (*func) (void *info), void *info, #define smp_cpu_not_running(cpu) 1 #define smp_get_cpu(cpu) ({ 0; }) #define smp_put_cpu(cpu) ({ 0; }) +#define smp_setup_cpu_possible_map() #endif #endif |