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

On Tue, Aug 06, 2013 at 08:36:38PM +1000, Benjamin Herrenschmidt wrote:

On Tue, 2013-08-06 at 18:23 +0800, Kevin Hao wrote:

quoted

We don't need to flush the dcache and invalidate the icache on the
CPU which has CPU_FTR_COHERENT_ICACHE set.

Actually we probably need an isync...

Will add.

Thanks,
Kevin

Ben.

quoted

Signed-off-by: Kevin Hao <redacted>
---
 arch/powerpc/kernel/misc_64.S | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/powerpc/kernel/misc_64.S b/arch/powerpc/kernel/misc_64.S
index a781566..32e78e2 100644
--- a/arch/powerpc/kernel/misc_64.S
+++ b/arch/powerpc/kernel/misc_64.S

@@ -207,6 +207,9 @@ _GLOBAL(flush_inval_dcache_range)
  *	void __flush_dcache_icache(void *page)
  */
 _GLOBAL(__flush_dcache_icache)
+BEGIN_FTR_SECTION
+	blr
+END_FTR_SECTION_IFSET(CPU_FTR_COHERENT_ICACHE)
 /*
  * Flush the data cache to memory 
  *