Re: [PATCH 2/5] x86: ret_from_fork - get rid of jump back

[Cyrill Gorcunov]

[Andi Kleen - Wed, Nov 26, 2008 at 09:04:33PM +0100]
| gorcunov@xxxxxxxxx writes:
| > --- a/arch/x86/kernel/entry_64.S
| > +++ b/arch/x86/kernel/entry_64.S
| > @@ -379,7 +379,10 @@ ENTRY(ret_from_fork)
| >  	GET_THREAD_INFO(%rcx)
| >  	testl $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT),TI_flags(%rcx)
| >  	CFI_REMEMBER_STATE
| > -	jnz rff_trace
| > +	jz rff_action
| > +	movq %rsp,%rdi
| > +	call syscall_trace_leave
| > +	GET_THREAD_INFO(%rcx)
| 
| The uncommon path is supposed to be out of line. I don't think
| the CPU will like that.
| 
| -Andi
| 
| >  rff_action:
| 
| -- 
| ak@xxxxxxxxxxxxxxx
| 

Aha! Thanks Andi for review.

		- Cyrill -
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