[patch] make hdrscheck.sh force __asm__ in exported headers

[Mike Frysinger <vapier@gentoo.org>]

This updates scripts/hdrschecks.sh by grepping for asm() constructs and
rejecting them in favor of __asm__() in exported headers.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
---
diff --git a/scripts/hdrcheck.sh b/scripts/hdrcheck.sh
index 3159858..33d17cc 100755
--- a/scripts/hdrcheck.sh
+++ b/scripts/hdrcheck.sh
@@ -6,5 +6,16 @@ for FILE in `grep '^[ \t]*#[ \t]*include[ \t]*<' $2 | cut -f2 -d\< | cut -f1 -d\
 	exit 1
     fi
 done
+
+# make sure we export __asm__(), not asm()
+lines=$(grep -n -E \
+	-e '\<asm[[:space:]]*(_{1,2}?volatile_{1,2}?[[:space:]]*)?\(' \
+	$2)
+if [ -n "$lines" ] ; then
+	echo "$2 should convert asm() usage to __asm__() in exported headers"
+	echo "$lines"
+	exit 1
+fi
+
 # FIXME: List dependencies into $3
 touch $3