Re: [PATCH][8/8] Arch agnostic completely out of line locks / x86_64

[Andi Kleen]

On Thu, Sep 02, 2004 at 08:03:02PM -0400, Zwane Mwaikambo wrote:
>  arch/x86_64/kernel/time.c        |   13 +++++++++++++
>  arch/x86_64/kernel/vmlinux.lds.S |    1 +
>  include/asm-x86_64/ptrace.h      |    4 ++++
>  3 files changed, 18 insertions(+)
> 
> Andi, i'm not so sure about that return address in profile_pc, i think i
> need to read a bit more.

When frame pointers are enabled the code is correct. But you don't 
even need frame pointers, because the spinlock code should not
spill any registers and in such a function the return address
is always *rsp. Same is true on i386 too. 

-Andi
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