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| author | Michael Ellerman | 2005-11-04 02:09:42 +0100 |
|---|---|---|
| committer | Michael Ellerman | 2005-11-04 02:09:42 +0100 |
| commit | b8f510219edc719d4c305918e16edc578bcfc16f (patch) | |
| tree | 7f0303abf4ce15d1f35516ee36fc8aebc270db6d /arch/powerpc/kernel/setup_64.c | |
| parent | powerpc: Cleanup vpa code (diff) | |
| download | kernel-qcow2-linux-b8f510219edc719d4c305918e16edc578bcfc16f.tar.gz kernel-qcow2-linux-b8f510219edc719d4c305918e16edc578bcfc16f.tar.xz kernel-qcow2-linux-b8f510219edc719d4c305918e16edc578bcfc16f.zip | |
powerpc: Implement smp_release_cpus() in C not asm
There's no reason for smp_release_cpus() to be asm, and most people can make
more sense of C code. Add an extern declaration to smp.h and remove the custom
one in machine_kexec.c
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Diffstat (limited to 'arch/powerpc/kernel/setup_64.c')
| -rw-r--r-- | arch/powerpc/kernel/setup_64.c | 23 |
1 files changed, 21 insertions, 2 deletions
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c index d4a3c5dd1a21..275d86ddd612 100644 --- a/arch/powerpc/kernel/setup_64.c +++ b/arch/powerpc/kernel/setup_64.c @@ -103,8 +103,6 @@ extern void htab_initialize(void); extern void early_init_devtree(void *flat_dt); extern void unflatten_device_tree(void); -extern void smp_release_cpus(void); - int have_of = 1; int boot_cpuid = 0; int boot_cpuid_phys = 0; @@ -400,6 +398,27 @@ void __init early_setup(unsigned long dt_ptr) } +#if defined(CONFIG_SMP) || defined(CONFIG_KEXEC) +void smp_release_cpus(void) +{ + extern unsigned long __secondary_hold_spinloop; + + DBG(" -> smp_release_cpus()\n"); + + /* All secondary cpus are spinning on a common spinloop, release them + * all now so they can start to spin on their individual paca + * spinloops. For non SMP kernels, the secondary cpus never get out + * of the common spinloop. + * This is useless but harmless on iSeries, secondaries are already + * waiting on their paca spinloops. */ + + __secondary_hold_spinloop = 1; + mb(); + + DBG(" <- smp_release_cpus()\n"); +} +#endif /* CONFIG_SMP || CONFIG_KEXEC */ + /* * Initialize some remaining members of the ppc64_caches and systemcfg structures * (at least until we get rid of them completely). This is mostly some |