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| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2009-09-22 20:54:53 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2009-09-22 21:01:40 +0100 |
| commit | ae19ffbadc1b2100285a5b5b3d0a4e0a11390904 (patch) | |
| tree | 3c2086ab67398a019089a47ca3f362a4bc6db74f /mm/allocpercpu.c | |
| parent | 34e84f39a27d059a3e6ec6e8b94aafa702e6f220 (diff) | |
| parent | 9173a8ef24a6b1b8031507b35b8ffe5f85a87692 (diff) | |
| download | kernel-crypto-ae19ffbadc1b2100285a5b5b3d0a4e0a11390904.tar.gz kernel-crypto-ae19ffbadc1b2100285a5b5b3d0a4e0a11390904.tar.xz kernel-crypto-ae19ffbadc1b2100285a5b5b3d0a4e0a11390904.zip | |
Merge branch 'master' into for-linus
Diffstat (limited to 'mm/allocpercpu.c')
| -rw-r--r-- | mm/allocpercpu.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/mm/allocpercpu.c b/mm/allocpercpu.c index dfdee6a4735..df34ceae0c6 100644 --- a/mm/allocpercpu.c +++ b/mm/allocpercpu.c @@ -5,6 +5,8 @@ */ #include <linux/mm.h> #include <linux/module.h> +#include <linux/bootmem.h> +#include <asm/sections.h> #ifndef cache_line_size #define cache_line_size() L1_CACHE_BYTES @@ -147,3 +149,29 @@ void free_percpu(void *__pdata) kfree(__percpu_disguise(__pdata)); } EXPORT_SYMBOL_GPL(free_percpu); + +/* + * Generic percpu area setup. + */ +#ifndef CONFIG_HAVE_SETUP_PER_CPU_AREA +unsigned long __per_cpu_offset[NR_CPUS] __read_mostly; + +EXPORT_SYMBOL(__per_cpu_offset); + +void __init setup_per_cpu_areas(void) +{ + unsigned long size, i; + char *ptr; + unsigned long nr_possible_cpus = num_possible_cpus(); + + /* Copy section for each CPU (we discard the original) */ + size = ALIGN(PERCPU_ENOUGH_ROOM, PAGE_SIZE); + ptr = alloc_bootmem_pages(size * nr_possible_cpus); + + for_each_possible_cpu(i) { + __per_cpu_offset[i] = ptr - __per_cpu_start; + memcpy(ptr, __per_cpu_start, __per_cpu_end - __per_cpu_start); + ptr += size; + } +} +#endif /* CONFIG_HAVE_SETUP_PER_CPU_AREA */ |