joel16/android_kernel_sony_msm8994_rework
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[PATCH] x86_64: Allocate cpu local data for all possible CPUs

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CPU hotplug fills up the possible map to NR_CPUs, but it did that after
setting up per CPU data. This lead to CPU data not getting allocated
for all possible CPUs, which lead to various side effects.

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Andi Kleen 2005-10-10 22:32:45 +02:00 committed by Linus Torvalds
parent af74c3a61d
commit 421c7ce6d0
3 changed files with 6 additions and 5 deletions
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4
arch/x86_64/kernel/setup64.c
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@ -87,6 +87,10 @@ void __init setup_per_cpu_areas(void)
int i;
unsigned long size;
#ifdef CONFIG_HOTPLUG_CPU
prefill_possible_map();
#endif
/* Copy section for each CPU (we discard the original) */
size = ALIGN(__per_cpu_end - __per_cpu_start, SMP_CACHE_BYTES);
#ifdef CONFIG_MODULES

6
arch/x86_64/kernel/smpboot.c
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@ -892,7 +892,7 @@ static __init void disable_smp(void)
* those NR_CPUS, hence cpu_possible_map represents entire NR_CPUS range.
* - Ashok Raj
*/
static void prefill_possible_map(void)
__init void prefill_possible_map(void)
{
int i;
for (i = 0; i < NR_CPUS; i++)
@ -967,10 +967,6 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
current_cpu_data = boot_cpu_data;
current_thread_info()->cpu = 0; /* needed? */
#ifdef CONFIG_HOTPLUG_CPU
prefill_possible_map();
#endif
if (smp_sanity_check(max_cpus) < 0) {
printk(KERN_INFO "SMP disabled\n");
disable_smp();

1
include/asm-x86_64/smp.h
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@ -81,6 +81,7 @@ static inline int hard_smp_processor_id(void)
extern int safe_smp_processor_id(void);
extern int __cpu_disable(void);
extern void __cpu_die(unsigned int cpu);
extern void prefill_possible_map(void);
#endif /* !ASSEMBLY */