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>

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

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
 }
 
 /*