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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 <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt 2009-10-14 11:51:28 +09:00
parent 36c8719926
commit d780613acc
1 changed files with 3 additions and 1 deletions
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4
arch/sh/kernel/smp.c
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@ -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);