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| author | Michael Ellerman <michael@ellerman.id.au> | 2006-02-16 14:13:50 +1100 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2006-02-20 12:03:34 +1100 |
| commit | f018b36f3e1f21318066de8d01740d30e38b03d5 (patch) | |
| tree | a893342f794d08a2ee79cbe960b312c54cb47e44 /arch | |
| parent | 2b9a32edba3af9ad4ccb23574bea0cc34455dc43 (diff) | |
| download | op-kernel-dev-f018b36f3e1f21318066de8d01740d30e38b03d5.zip op-kernel-dev-f018b36f3e1f21318066de8d01740d30e38b03d5.tar.gz | |
[PATCH] powerpc: Don't start secondary CPUs in a UP && KEXEC kernel
Because smp_release_cpus() is built for SMP || KEXEC, it's not safe to
unconditionally call it from setup_system(). On a UP && KEXEC kernel we'll
start up the secondary CPUs which will then go beserk and we die.
Simple fix is to conditionally call smp_release_cpus() in setup_system(). With
that in place we don't need the dummy definition of smp_release_cpus() because
all call sites are #ifdef'ed either SMP or KEXEC.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/kernel/setup_64.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c index a717dff..f96c49b 100644 --- a/arch/powerpc/kernel/setup_64.c +++ b/arch/powerpc/kernel/setup_64.c @@ -311,8 +311,6 @@ void smp_release_cpus(void) DBG(" <- smp_release_cpus()\n"); } -#else -#define smp_release_cpus() #endif /* CONFIG_SMP || CONFIG_KEXEC */ /* @@ -473,10 +471,12 @@ void __init setup_system(void) check_smt_enabled(); smp_setup_cpu_maps(); +#ifdef CONFIG_SMP /* Release secondary cpus out of their spinloops at 0x60 now that * we can map physical -> logical CPU ids */ smp_release_cpus(); +#endif printk("Starting Linux PPC64 %s\n", system_utsname.version); |
