[PATCH] xtensa: cleanups for errno and ipc.
I noticed this because I was doing some more ipc cleanups and I did the original errno and ipc cleanups for other architectures, so it stuck out. Signed-off-by: NStephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: NChris Zankel <chris@zankel.net> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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