scripts/checkpatch.pl: warn about using __FUNCTION__

__FUNCTION__ is gcc specific, __func__ is C99

---
 scripts/checkpatch.pl |    5 +++++
 1 file changed, 5 insertions(+)

Index: b/scripts/checkpatch.pl
===================================================================
@@ -1557,6 +1557,11 @@ sub process {
 		if ($line =~ /\*\s*\)\s*k[czm]alloc\b/) {
 			WARN("unnecessary cast may hide bugs, see 

http://c-faq.com/malloc/mallocnocast.html\n" . $herecurr);
}
+
+# check for gcc specific __FUNCTION__
+ if ($line =~ /__FUNCTION__/) {
+ WARN("__func__ should be used instead of gcc specific __FUNCTION__\n" . $herecurr);
+ }
}

# In mailback mode only produce a report in the negative, for

Research seems to indicate this is indeed sensible as __FUNCTION__ can cause -Werror to trip. Have applied this for 0.14.

Thanks.

-apw