Hi,

On Tue, Aug 31, 2010 at 02:58:56PM +0100, Catalin Marinas wrote:

From: Leif Lindholm <redacted>

The SWP instruction was deprecated in the ARMv6 architecture, superseded
by the LDREX/STREX family of instructions for
load-linked/store-conditional operations. The ARMv7 multiprocessing
extensions mandate that SWP/SWPB instructions are treated as undefined
from reset, with the ability to enable them through the System Control
Register SW bit.

This patch adds the alternative solution to emulate the SWP and SWPB
instructions using LDREX/STREX sequences, and log statistics to
/proc/cpu/swp_emulation. To correctly deal with copy-on-write, it also

Sounds like debugfs would be a better place to export this through?
That's what PPC does.


-Olof