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 <[email protected]>
Acked-by: Arnd Bergmann <[email protected]>
Reviewed-by: Jamie Iles <[email protected]>
Signed-off-by: Russell King <[email protected]>

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