[RFC PATCH 08/17] powerpc/e500: Remove conditional "lwsync" substitution

Kyle Moffett Kyle.D.Moffett at boeing.com
Thu Nov 10 11:07:06 EST 2011

As FreeScale e500 systems have different cacheline sizes from e500mc, it
is basically impossible for the kernel to support both in a single
system image at present.

Given that one is SPE-float and the other is classic-float, they are not
generally userspace-compatible either.

This patch updates the conditional to depend on whether the system is
actually targetting an "e500" or "e500mc" core and entirely removes the
unused sync-to-lwsync-replacement on e500v1/e500v2 systems.

Signed-off-by: Kyle Moffett <Kyle.D.Moffett at boeing.com>
 arch/powerpc/include/asm/synch.h |   16 ++++------------
 1 files changed, 4 insertions(+), 12 deletions(-)

diff --git a/arch/powerpc/include/asm/synch.h b/arch/powerpc/include/asm/synch.h
index d7cab44..3d518b6 100644
--- a/arch/powerpc/include/asm/synch.h
+++ b/arch/powerpc/include/asm/synch.h
@@ -5,8 +5,11 @@
 #include <linux/stringify.h>
 #include <asm/feature-fixups.h>
-#if defined(__powerpc64__) || defined(CONFIG_PPC_E500MC)
+#if defined(__powerpc64__) || defined(CONFIG_FSL_E500MC)
+#define LWSYNC lwsync
+#define LWSYNC sync
 #ifndef __ASSEMBLY__
@@ -25,17 +28,6 @@ static inline void isync(void)
 #endif /* __ASSEMBLY__ */
-#if defined(__powerpc64__)
-#    define LWSYNC	lwsync
-#elif defined(CONFIG_E500)
-#    define LWSYNC					\
-	sync;						\
-	MAKE_LWSYNC_SECTION_ENTRY(96, __lwsync_fixup);
-#    define LWSYNC	sync
 #ifdef CONFIG_SMP
 #define __PPC_ACQUIRE_BARRIER				\

More information about the Linuxppc-dev mailing list