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mm: remove MIGRATE_ISOLATE check in hotpath

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Several functions test MIGRATE_ISOLATE and some of those are hotpath but
MIGRATE_ISOLATE is used only if we enable CONFIG_MEMORY_ISOLATION(ie,
CMA, memory-hotplug and memory-failure) which are not common config
option.  So let's not add unnecessary overhead and code when we don't
enable CONFIG_MEMORY_ISOLATION.

Signed-off-by: Minchan Kim <[email protected]>
Cc: KOSAKI Motohiro <[email protected]>
Acked-by: Michal Nazarewicz <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Minchan Kim 2013-02-22 16:33:58 -08:00 • committed by Linus Torvalds
commit 194159fbcc
5 changed files with 38 additions and 7 deletions
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2
mm/vmstat.c
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@ -628,7 +628,9 @@ static char * const migratetype_names[MIGRATE_TYPES] = {
#ifdef CONFIG_CMA
"CMA",
#endif
#ifdef CONFIG_MEMORY_ISOLATION
"Isolate",
#endif
};
static void *frag_start(struct seq_file *m, loff_t *pos)