MN10300: Allow some cacheflushes to be avoided if cache snooping is available

The AM34 core is able to do cache snooping, and so can skip some of the cache
flushing.

Signed-off-by: David Howells <dhowells@redhat.com>

2 files changed, 6 insertions, 0 deletions

diff --git a/arch/mn10300/kernel/kprobes.c b/arch/mn10300/kernel/kprobes.c
index 67e6389d625a..0311a7fcea16 100644
--- a/arch/mn10300/kernel/kprobes.c
+++ b/arch/mn10300/kernel/kprobes.c
@@ -377,8 +377,10 @@ void __kprobes arch_arm_kprobe(struct kprobe *p)
 
 void __kprobes arch_disarm_kprobe(struct kprobe *p)
 {
+#ifndef CONFIG_MN10300_CACHE_SNOOP
         mn10300_dcache_flush();
         mn10300_icache_inv();
+#endif
 }
 
 void arch_remove_kprobe(struct kprobe *p)
@@ -390,8 +392,10 @@ void __kprobes disarm_kprobe(struct kprobe *p, struct pt_regs *regs)
 {
         *p->addr = p->opcode;
         regs->pc = (unsigned long) p->addr;
+#ifndef CONFIG_MN10300_CACHE_SNOOP
         mn10300_dcache_flush();
         mn10300_icache_inv();
+#endif
 }
 
 static inline
diff --git a/arch/mn10300/kernel/traps.c b/arch/mn10300/kernel/traps.c
index a64604b512d5..c7257a1304a9 100644
--- a/arch/mn10300/kernel/traps.c
+++ b/arch/mn10300/kernel/traps.c
@@ -533,8 +533,10 @@ void __init set_intr_stub(enum exception_code code, void *handler)
         vector[6] = 0xcb;
         vector[7] = 0xcb;
 
+#ifndef CONFIG_MN10300_CACHE_SNOOP
         mn10300_dcache_flush_inv();
         mn10300_icache_inv();
+#endif
 }
 
 /*