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| author | Paul Mundt <lethal@linux-sh.org> | 2008-08-06 18:39:32 +0900 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2008-09-08 10:35:03 +0900 |
| commit | 71f0bdcab69ab36b1e939d36063aaf6c4a164ed3 (patch) | |
| tree | 5d213c8bb4fc18b419ed297053e9be060fb7b58c /arch/sh/kernel/cpu/sh4a/smp-shx3.c | |
| parent | 8c24594deab89a484879bee270e948f0a556ed75 (diff) | |
| download | op-kernel-dev-71f0bdcab69ab36b1e939d36063aaf6c4a164ed3.zip op-kernel-dev-71f0bdcab69ab36b1e939d36063aaf6c4a164ed3.tar.gz | |
sh: smp: shove a cpu_relax() in the plat_start_cpu() busy loop.
Without this, certain versions of GCC will happily optimize the entire
loop out.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/kernel/cpu/sh4a/smp-shx3.c')
| -rw-r--r-- | arch/sh/kernel/cpu/sh4a/smp-shx3.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/sh/kernel/cpu/sh4a/smp-shx3.c b/arch/sh/kernel/cpu/sh4a/smp-shx3.c index edb4da0..b8869aa 100644 --- a/arch/sh/kernel/cpu/sh4a/smp-shx3.c +++ b/arch/sh/kernel/cpu/sh4a/smp-shx3.c @@ -82,7 +82,7 @@ void plat_start_cpu(unsigned int cpu, unsigned long entry_point) ctrl_outl(STBCR_MSTP, STBCR_REG(cpu)); while (!(ctrl_inl(STBCR_REG(cpu)) & STBCR_MSTP)) - ; + cpu_relax(); /* Start up secondary processor by sending a reset */ ctrl_outl(STBCR_AP_VAL, STBCR_REG(cpu)); |
