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| author | Rasmus Villemoes <linux@rasmusvillemoes.dk> | 2015-06-24 16:56:28 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-06-24 17:49:41 -0700 |
| commit | a9919c79359df9a706ff9e14fc0a93cd15791c9b (patch) | |
| tree | 32bb182bd88f0fb58bfe891b26290bf53b5a6d37 /include | |
| parent | a67a31fa308a9032ead31b0501dafdb44ccf5a12 (diff) | |
| download | blackbird-op-linux-a9919c79359df9a706ff9e14fc0a93cd15791c9b.tar.gz blackbird-op-linux-a9919c79359df9a706ff9e14fc0a93cd15791c9b.zip | |
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>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/bootmem.h | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/include/linux/bootmem.h b/include/linux/bootmem.h index 0995c2de8162..f589222bfa87 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 */ |
