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mm,x86,um: move CMPXCHG_LOCAL config option

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Move CMPXCHG_LOCAL and rename it to HAVE_CMPXCHG_LOCAL so architectures
can simply select the option if it is supported.

Signed-off-by: Heiko Carstens <[email protected]>
Acked-by: Christoph Lameter <[email protected]>
Cc: Pekka Enberg <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: "H. Peter Anvin" <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Heiko Carstens 2012-01-12 17:17:30 -08:00 • committed by Linus Torvalds
commit 4156153c4d
5 changed files with 5 additions and 8 deletions
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2
mm/vmstat.c
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@ -295,7 +295,7 @@ void __dec_zone_page_state(struct page *page, enum zone_stat_item item)
}
EXPORT_SYMBOL(__dec_zone_page_state);
#ifdef CONFIG_CMPXCHG_LOCAL
#ifdef CONFIG_HAVE_CMPXCHG_LOCAL
/*
* If we have cmpxchg_local support then we do not need to incur the overhead
* that comes with local_irq_save/restore if we use this_cpu_cmpxchg.