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hugetlb: add an inline helper for finding hstate index

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Add an inline helper and use it in the code.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Acked-by: David Rientjes <rientjes@google.com>
Acked-by: Michal Hocko <mhocko@suse.cz>
Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Hillf Danton <dhillf@gmail.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Aneesh Kumar K.V 2012-07-31 16:42:00 -07:00 • committed by Linus Torvalds
parent 76dcee75c1
commit 972dc4de13
2 changed files with 17 additions and 9 deletions
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6
include/linux/hugetlb.h
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@ -302,6 +302,11 @@ static inline unsigned hstate_index_to_shift(unsigned index)
return hstates[index].order + PAGE_SHIFT;
}
static inline int hstate_index(struct hstate *h)
{
return h - hstates;
}
#else
struct hstate {};
#define alloc_huge_page_node(h, nid) NULL
@ -320,6 +325,7 @@ static inline unsigned int pages_per_huge_page(struct hstate *h)
return 1;
}
#define hstate_index_to_shift(index) 0
#define hstate_index(h) 0
#endif
#endif /* _LINUX_HUGETLB_H */