[PATCH v2 3/3] powerpc: check CPU_FTR_COHERENT_ICACHE in __flush_dcache_icache for 64bit kernel

[Kevin Hao]

We don't need to flush the dcache and invalidate the icache on the
CPU which has CPU_FTR_COHERENT_ICACHE set. Also add the missing
required isync in this case.

Signed-off-by: Kevin Hao <haokexin at gmail.com>
---
v2: Add the isync.

 arch/powerpc/kernel/misc_64.S | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/powerpc/kernel/misc_64.S b/arch/powerpc/kernel/misc_64.S
index 971d7e7..992a78e 100644
--- a/arch/powerpc/kernel/misc_64.S
+++ b/arch/powerpc/kernel/misc_64.S
@@ -207,6 +207,10 @@ _GLOBAL(flush_inval_dcache_range)
  *	void __flush_dcache_icache(void *page)
  */
 _GLOBAL(__flush_dcache_icache)
+BEGIN_FTR_SECTION
+	isync
+	blr
+END_FTR_SECTION_IFSET(CPU_FTR_COHERENT_ICACHE)
 /*
  * Flush the data cache to memory 
  * 
-- 
1.8.3.1