diff options
| author | David S. Miller <davem@sunset.davemloft.net> | 2006-02-25 13:39:56 -0800 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2006-02-26 19:36:00 -0800 |
| commit | 7abea9214585823f7f19d91872d7c6f8874bef9a (patch) | |
| tree | e7861664ee1596ed226725005d6b41a7b0edc447 | |
| parent | 043df59eb3798c094e6ba47136f3d3b34a6791a7 (diff) | |
[SPARC64]: Make cpu_present_map available earlier.
The change to kernel/sched.c's init code to use for_each_cpu()
requires that the cpu_possible_map be setup much earlier.
Set it up via setup_arch(), constrained to NR_CPUS, and later
constrain it to max_cpus in smp_prepare_cpus().
This fixes SMP booting on sparc64.
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | arch/sparc64/kernel/setup.c | 2 | ||||
| -rw-r--r-- | arch/sparc64/kernel/smp.c | 28 | ||||
| -rw-r--r-- | include/asm-sparc64/smp.h | 6 |
3 files changed, 27 insertions, 9 deletions
diff --git a/arch/sparc64/kernel/setup.c b/arch/sparc64/kernel/setup.c index 054461e6946..158bd31e15b 100644 --- a/arch/sparc64/kernel/setup.c +++ b/arch/sparc64/kernel/setup.c @@ -542,6 +542,8 @@ void __init setup_arch(char **cmdline_p) } #endif + smp_setup_cpu_possible_map(); + paging_init(); } diff --git a/arch/sparc64/kernel/smp.c b/arch/sparc64/kernel/smp.c index 1fb6323e65a..1f7ad8a6905 100644 --- a/arch/sparc64/kernel/smp.c +++ b/arch/sparc64/kernel/smp.c @@ -1079,18 +1079,12 @@ int setup_profiling_timer(unsigned int multiplier) return 0; } +/* Constrain the number of cpus to max_cpus. */ void __init smp_prepare_cpus(unsigned int max_cpus) { - int instance, mid; - - instance = 0; - while (!cpu_find_by_instance(instance, NULL, &mid)) { - if (mid < max_cpus) - cpu_set(mid, phys_cpu_present_map); - instance++; - } - if (num_possible_cpus() > max_cpus) { + int instance, mid; + instance = 0; while (!cpu_find_by_instance(instance, NULL, &mid)) { if (mid != boot_cpu_id) { @@ -1105,6 +1099,22 @@ void __init smp_prepare_cpus(unsigned int max_cpus) smp_store_cpu_info(boot_cpu_id); } +/* Set this up early so that things like the scheduler can init + * properly. We use the same cpu mask for both the present and + * possible cpu map. + */ +void __init smp_setup_cpu_possible_map(void) +{ + int instance, mid; + + instance = 0; + while (!cpu_find_by_instance(instance, NULL, &mid)) { + if (mid < NR_CPUS) + cpu_set(mid, phys_cpu_present_map); + instance++; + } +} + void __devinit smp_prepare_boot_cpu(void) { if (hard_smp_processor_id() >= NR_CPUS) { diff --git a/include/asm-sparc64/smp.h b/include/asm-sparc64/smp.h index 110a2de8912..473edb2603e 100644 --- a/include/asm-sparc64/smp.h +++ b/include/asm-sparc64/smp.h @@ -66,8 +66,14 @@ static __inline__ int hard_smp_processor_id(void) #define raw_smp_processor_id() (current_thread_info()->cpu) +extern void smp_setup_cpu_possible_map(void); + #endif /* !(__ASSEMBLY__) */ +#else + +#define smp_setup_cpu_possible_map() do { } while (0) + #endif /* !(CONFIG_SMP) */ #define NO_PROC_ID 0xFF |