RE: [PATCH] remove LOCK_SECTION from x86_64 spin_lock asm

[Andrew Chew]

> > If you enable profiling and frame pointers, profile_pc() goes splat 
> > dereferencing the `regs' argument when it decides that the 
> pc refers 
> > to a lock section.  Ingo said `regs' had a value of 0x2, iirc.  
> > Consider this a bug report ;)

I've been seeing this as well, although I'm pretty sure I have profiling
disabled.  Are you sure it isn't the combination of SMP support and
frame pointers that causes this bug to occur? (It looks like
profile_pc() takes on a different implementation only if both CONFIG_SMP
and CONFIG_FRAME_POINTER is defined.)
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