diff options
| author | Barry Song <21cnbao@gmail.com> | 2011-09-09 10:30:34 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2011-10-17 09:11:36 +0100 |
| commit | 1caf30924f71ae16a26aa59b02a6401f467bf1c8 (patch) | |
| tree | 35fe16a1ed060632db361f5444285aad24bbaed3 /arch | |
| parent | 8c369264b6de3b2ab796f330a4d85770a6b8b033 (diff) | |
ARM: 7089/1: L2X0: add explicit cpu_relax() for busy wait loop
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>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/mm/cache-l2x0.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm/mm/cache-l2x0.c b/arch/arm/mm/cache-l2x0.c index db4484f5bf98..a78044885ed5 100644 --- a/arch/arm/mm/cache-l2x0.c +++ b/arch/arm/mm/cache-l2x0.c @@ -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 */ while (readl_relaxed(reg) & mask) - ; + cpu_relax(); } #ifdef CONFIG_CACHE_PL310 |