[PATCH v4 4/7] powerpc/64s: Move system_call() symbol to just after setting MSR_EE

[Nicholas Piggin]

On Thu, 29 Jun 2017 16:11:07 +0530
"Naveen N. Rao" <naveen.n.rao at linux.vnet.ibm.com> wrote:

> It is common to get a PMU interrupt right after the mtmsr instruction that
> enables interrupts. Due to this, the stack trace profile gets needlessly split
> across system_call_common() and system_call().
> 
> Previously, system_call() symbol was at the current place to hide a few
> earlier symbols which have since been made private or removed entirely.
> 
> So, let's move system_call() slightly higher up, right after the mtmsr
> instruction that enables interrupts. Convert existing references to
> system_call to a local syscall symbol.
> 
> Suggested-by: Nicholas Piggin <npiggin at gmail.com>
> Signed-off-by: Naveen N. Rao <naveen.n.rao at linux.vnet.ibm.com>

Ah, I didn't realize the label is actually used. Still, I like the
patch myself.

Reviewed-by: Nicholas Piggin <npiggin at gmail.com>