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| author | Li Shaohua <shaohua.li@intel.com> | 2005-06-25 14:54:53 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-06-25 16:24:29 -0700 |
| commit | 6fe940d6c300886de4ff1454d8ffd363172af433 (patch) | |
| tree | 58c34aed66a85ff72bdba1d5e3a3e3c967621a04 /arch/i386/kernel/smpboot.c | |
| parent | 67664c8f7e74def5adf66298a1245d82af72db2c (diff) | |
| download | blackbird-op-linux-6fe940d6c300886de4ff1454d8ffd363172af433.tar.gz blackbird-op-linux-6fe940d6c300886de4ff1454d8ffd363172af433.zip | |
[PATCH] sep initializing rework
Make SEP init per-cpu, so it is hotplug safe.
Signed-off-by: Li Shaohua<shaohua.li@intel.com>
Signed-off-by: Ashok Raj <ashok.raj@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/i386/kernel/smpboot.c')
| -rw-r--r-- | arch/i386/kernel/smpboot.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/i386/kernel/smpboot.c b/arch/i386/kernel/smpboot.c index ad74a46e9ef0..c5517f332309 100644 --- a/arch/i386/kernel/smpboot.c +++ b/arch/i386/kernel/smpboot.c @@ -449,7 +449,18 @@ static void __init start_secondary(void *unused) * the local TLBs too. */ local_flush_tlb(); + + /* + * We need to hold call_lock, so there is no inconsistency + * between the time smp_call_function() determines number of + * IPI receipients, and the time when the determination is made + * for which cpus receive the IPI. Holding this + * lock helps us to not include this cpu in a currently in progress + * smp_call_function(). + */ + lock_ipi_call_lock(); cpu_set(smp_processor_id(), cpu_online_map); + unlock_ipi_call_lock(); /* We can take interrupts now: we're officially "up". */ local_irq_enable(); |
