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| author | Rasmus Villemoes <linux@rasmusvillemoes.dk> | 2015-05-14 01:01:38 +0000 |
|---|---|---|
| committer | Johannes Weiner <hannes@cmpxchg.org> | 2015-05-14 01:01:38 +0000 |
| commit | 83be29b21882dd6c449dbf0e1f23135e482d1df7 (patch) | |
| tree | d659117bf2855939929279756bace3e4d253157d | |
| parent | 6af2c7bafad4d2db3cb9f8f211b77fd497fa1166 (diff) | |
| download | mm-next-83be29b21882dd6c449dbf0e1f23135e482d1df7.tar.gz | |
mm: only define hashdist variable when needed
For !CONFIG_NUMA, hashdist will always be 0, since it's setter is
otherwise compiled out. So we can save 4 bytes of data and some .text
(although mostly in __init functions) by only defining it for CONFIG_NUMA.
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Acked-by: David Rientjes <rientjes@google.com>
Reviewed-by: Michal Hocko <mhocko@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| -rw-r--r-- | include/linux/bootmem.h | 8 | ||||
| -rw-r--r-- | mm/page_alloc.c | 2 |
2 files changed, 5 insertions, 5 deletions
diff --git a/include/linux/bootmem.h b/include/linux/bootmem.h index 0995c2de8162c2..f589222bfa87e4 100644 --- a/include/linux/bootmem.h +++ b/include/linux/bootmem.h @@ -357,12 +357,12 @@ extern void *alloc_large_system_hash(const char *tablename, /* Only NUMA needs hash distribution. 64bit NUMA architectures have * sufficient vmalloc space. */ -#if defined(CONFIG_NUMA) && defined(CONFIG_64BIT) -#define HASHDIST_DEFAULT 1 +#ifdef CONFIG_NUMA +#define HASHDIST_DEFAULT IS_ENABLED(CONFIG_64BIT) +extern int hashdist; /* Distribute hashes across NUMA nodes? */ #else -#define HASHDIST_DEFAULT 0 +#define hashdist (0) #endif -extern int hashdist; /* Distribute hashes across NUMA nodes? */ #endif /* _LINUX_BOOTMEM_H */ diff --git a/mm/page_alloc.c b/mm/page_alloc.c index d358ab52edbfa4..efcce7639fd44a 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -6345,9 +6345,9 @@ out: return ret; } +#ifdef CONFIG_NUMA int hashdist = HASHDIST_DEFAULT; -#ifdef CONFIG_NUMA static int __init set_hashdist(char *str) { if (!str) |