From d780613acc0eeea89e1b3a7d9db765e0f2a4a950 Mon Sep 17 00:00:00 2001 From: Paul Mundt Date: Wed, 14 Oct 2009 11:51:28 +0900 Subject: [PATCH] sh: Only invalidate the I-cache range for secondary CPUs stack_start. Secondary CPUs already take care of the D-cache bits through the common cache initialization path, and the only thing that is necessary after twiddling around with stack_start is ensuring that the I-cache changes are visible (particularly since this tends to be the only part lacking coherency). Signed-off-by: Paul Mundt --- arch/sh/kernel/smp.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/arch/sh/kernel/smp.c b/arch/sh/kernel/smp.c index 442d8d47a41e..6a27c657648d 100644 --- a/arch/sh/kernel/smp.c +++ b/arch/sh/kernel/smp.c @@ -120,7 +120,9 @@ int __cpuinit __cpu_up(unsigned int cpu) stack_start.bss_start = 0; /* don't clear bss for secondary cpus */ stack_start.start_kernel_fn = start_secondary; - flush_cache_all(); + flush_icache_range((unsigned long)&stack_start, + (unsigned long)&stack_start + sizeof(stack_start)); + wmb(); plat_start_cpu(cpu, (unsigned long)_stext); -- 2.39.5