On 06/02/2012 04:23 AM, David Miller wrote:
> From: "Srivatsa S. Bhat" <srivatsa.bhat@xxxxxxxxxxxxxxxxxx>
> Date: Sat, 02 Jun 2012 04:17:47 +0530
>
>>
>> Convert sparc32 to use the generic framework to boot secondary CPUs.
>>
>> Notes:
>> While removing the call to cpu_idle(), we can also remove the call to
>> cpu_panic() because we are calling BUG() in the generic code anyway.
>>
>> Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@xxxxxxxxxxxxxxxxxx>
>
> Almost there, but not quite yet.
>
> You can't get rid of the cpu_panic invocations, those have to be there
> after the *_callin calls to catch if they accidently return.
>
Oh.. ok..
So can I do something like the following, or do you want me to specifically
add call cpu_panic and nop after every *_callin?
diff --git a/arch/sparc/kernel/trampoline_32.S b/arch/sparc/kernel/trampoline_32.S
index 7364ddc..9b2b81d 100644
--- a/arch/sparc/kernel/trampoline_32.S
+++ b/arch/sparc/kernel/trampoline_32.S
@@ -82,15 +82,12 @@ cpu3_startup:
call smp4m_callin
nop
- b,a smp_do_cpu_idle
+ b,a do_panic
.text
.align 4
-smp_do_cpu_idle:
- call cpu_idle
- mov 0, %o0
-
+do_panic:
call cpu_panic
nop
@@ -147,7 +144,7 @@ sun4d_cpu_startup:
call smp4d_callin
nop
- b,a smp_do_cpu_idle
+ b,a do_panic
#ifdef CONFIG_SPARC_LEON
@@ -206,6 +203,6 @@ leon_smp_cpu_startup:
call leon_callin
nop
- b,a smp_do_cpu_idle
+ b,a do_panic
--
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