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| author | Michael Ellerman <mpe@ellerman.id.au> | 2014-12-29 15:47:05 +1100 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2014-12-29 15:51:51 +1100 |
| commit | 1be6f10f6f9caade3a053938cb80a2eed237e262 (patch) | |
| tree | 24a706d6feaf8f75031885f3cb92dd3c688fcc43 | |
| parent | c1caae3de46a072d0855729aed6e793e536a4a55 (diff) | |
| download | blackbird-op-linux-1be6f10f6f9caade3a053938cb80a2eed237e262.tar.gz blackbird-op-linux-1be6f10f6f9caade3a053938cb80a2eed237e262.zip | |
Revert "powerpc: Secondary CPUs must set cpu_callin_map after setting active and online"
This reverts commit 7c5c92ed56d932b2c19c3f8aea86369509407d33.
Although this did fix the bug it was aimed at, it also broke secondary
startup on platforms that use give/take_timebase(). Unfortunately we
didn't detect that while it was in next.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
| -rw-r--r-- | arch/powerpc/kernel/smp.c | 9 |
1 files changed, 1 insertions, 8 deletions
diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c index 8ec017cb4446..8b2d2dc8ef10 100644 --- a/arch/powerpc/kernel/smp.c +++ b/arch/powerpc/kernel/smp.c @@ -700,6 +700,7 @@ void start_secondary(void *unused) smp_store_cpu_info(cpu); set_dec(tb_ticks_per_jiffy); preempt_disable(); + cpu_callin_map[cpu] = 1; if (smp_ops->setup_cpu) smp_ops->setup_cpu(cpu); @@ -738,14 +739,6 @@ void start_secondary(void *unused) notify_cpu_starting(cpu); set_cpu_online(cpu, true); - /* - * CPU must be marked active and online before we signal back to the - * master, because the scheduler needs to see the cpu_online and - * cpu_active bits set. - */ - smp_wmb(); - cpu_callin_map[cpu] = 1; - local_irq_enable(); cpu_startup_entry(CPUHP_ONLINE); |
