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ARM: 7089/1: L2X0: add explicit cpu_relax() for busy wait loop

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using cpu_relax in busy loops is a well-known idiom in the kernel.
It's more for documentation purposes than technically needed here.

Signed-off-by: Barry Song <Baohua.Song@csr.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Jamie Iles <jamie@jamieiles.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Barry Song 2011-09-09 10:30:34 +01:00 committed by Russell King
parent 8c369264b6
commit 1caf30924f
1 changed files with 1 additions and 1 deletions
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2
arch/arm/mm/cache-l2x0.c
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@ -37,7 +37,7 @@ static inline void cache_wait_way(void __iomem *reg, unsigned long mask)
{ {
/* wait for cache operation by line or way to complete */ /* wait for cache operation by line or way to complete */
while (readl_relaxed(reg) & mask) while (readl_relaxed(reg) & mask)
; cpu_relax();
} }
#ifdef CONFIG_CACHE_PL310 #ifdef CONFIG_CACHE_PL310