checkpatch: ERROR: Does not appear to be a unified-diff format patch

[Geert Uytterhoeven <geert@linux-m68k.org>]

scripts/checkpatch.pl doesn't seem to like this patch:

$ scripts/checkpatch.pl m68k-export-asm-cachectl-h.diff 
ERROR: Does not appear to be a unified-diff format patch

Your patch has style problems, please review.  If any of these errors
are false positives report them to the maintainer, see
CHECKPATCH in MAINTAINERS.
$ cat m68k-export-asm-cachectl-h.diff 
Subject: m68k: Export cachectl.h

From: Matthew Wilcox <matthew@wil.cx>

libffi in GCC 4.2 needs cachectl.h to do its cache flushing.  But we
don't currently export it.  I believe this patch should do the trick.

Signed-off-by: Matthew Wilcox <matthew@wil.cx>
---
 include/asm-m68k/Kbuild |    1 +
 1 file changed, 1 insertion(+)

--- a/include/asm-m68k/Kbuild
+++ b/include/asm-m68k/Kbuild
@@ -1 +1,2 @@
 include include/asm-generic/Kbuild.asm
+header-y += cachectl.h
$ 

Gr{oetje,eeting}s,

						Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
							    -- Linus Torvalds
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