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[PATCH] memory hotplug prep: __section_nr helper

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A little helper that we use in the hotplug code.

Signed-off-by: Dave Hansen <haveblue@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Dave Hansen
2005-10-29 18:16:51 -07:00
committed by Linus Torvalds
parent ed8ece2ec8
commit 4ca644d970
2 changed files with 26 additions and 0 deletions
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include/linux/mmzone.h
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@@ -509,6 +509,7 @@ static inline struct mem_section *__nr_to_section(unsigned long nr)
return NULL;
return &mem_section[SECTION_NR_TO_ROOT(nr)][nr & SECTION_ROOT_MASK];
}
extern int __section_nr(struct mem_section* ms);
/*
* We use the lower bits of the mem_map pointer to store