Merge pull request #1245 from antonio-nino-diaz-arm/an/checkpatch

Analyze coding style of patches individually

.checkpatch.conf

 #
-# Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
+# Copyright (c) 2016-2018, ARM Limited and Contributors. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are met:
@@ -48,6 +48,10 @@
 #      drivers/arm/gic/arm_gic.c:160:
 --showfile
 
+# Don't show some messages like the list of ignored types or the suggestion to
+# use "--fix" or report changes to the maintainers.
+--quiet
+
 #
 # Ignore the following message types, as they don't necessarily make sense in
 # the context of the Trusted Firmware.
@@ -78,6 +82,9 @@
 # We allow adding new typedefs in TF.
 --ignore NEW_TYPEDEFS
 
+# Avoid "Does not appear to be a unified-diff format patch" message
+--ignore NOT_UNIFIED_DIFF
+
 # VOLATILE reports this kind of messages:
 # "Use of volatile is usually wrong: see Documentation/volatile-considered-harmful.txt"
 # We allow the usage of the volatile keyword in TF.

Makefile

 #
-# Copyright (c) 2013-2017, ARM Limited and Contributors. All rights reserved.
+# Copyright (c) 2013-2018, ARM Limited and Contributors. All rights reserved.
 #
 # SPDX-License-Identifier: BSD-3-Clause
 #
@@ -680,7 +680,14 @@ checkcodebase:		locate-checkpatch
 
 checkpatch:		locate-checkpatch
 	@echo "  CHECKING STYLE"
-	${Q}git format-patch --stdout ${BASE_COMMIT}..HEAD -- ${CHECK_PATHS} | ${CHECKPATCH} - || true
+	${Q}COMMON_COMMIT=$$(git merge-base HEAD ${BASE_COMMIT});	\
+	for commit in `git rev-list $$COMMON_COMMIT..HEAD`; do		\
+		printf "\n[*] Checking style of '$$commit'\n\n";	\
+		git log --format=email "$$commit~..$$commit"		\
+			-- ${CHECK_PATHS} | ${CHECKPATCH} - || true;	\
+		git diff --format=email "$$commit~..$$commit"		\
+			-- ${CHECK_PATHS} | ${CHECKPATCH} - || true;	\
+	done
 
 certtool: ${CRTTOOL}