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Date:	Fri, 11 Jul 2014 18:53:27 -0700
From:	Greg KH <gregkh@...uxfoundation.org>
To:	Joe Perches <joe@...ches.com>
Cc:	devel@...verdev.osuosl.org,
	kernel-janitors <kernel-janitors@...r.kernel.org>,
	kernelnewbies@...nelnewbies.org,
	LKML <linux-kernel@...r.kernel.org>,
	Dan Carpenter <dan.carpenter@...cle.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] reformat_with_checkpatch: Add automation to checkpatch

On Fri, Jul 11, 2014 at 06:21:27PM -0700, Joe Perches wrote:
> A simple script to run checkpatch --fix for various types of
> of cleanups.
> 
> This script is useful primarily for staging.
> 
> This reformats code to a more CodingStyle conforming style,
> compiles it, verifies that the object code hasn't changed,
> and git commits it too.
> 
> You must have the necessary development tools, git, and a
> recent git tree.  Ideally use Greg KH's staging-next, which
> can be retrieved via these commands:
> 
> git clone git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git
> git checkout staging-next
> 
> To use this script try a sequence of commands like:
> 
> 	cd <linux_repository>
> 	git checkout -b <your_branch>
> 	make allyesconfig
> 	mkdir patches
> 	./scripts/reformat_with_checkpatch.sh drivers/staging/<dir>/*.[ch]
> 	git format-patch --cover-letter -o patches/<your_branch> staging-next
> 	git send-email patches/<your_branch>
> 
> Signed-off-by: Joe Perches <joe@...ches.com>
> ---
>  scripts/reformat_with_checkpatch.sh | 141 ++++++++++++++++++++++++++++++++++++
>  1 file changed, 141 insertions(+)
>  create mode 100755 scripts/reformat_with_checkpatch.sh
> 
> diff --git a/scripts/reformat_with_checkpatch.sh b/scripts/reformat_with_checkpatch.sh
> new file mode 100755
> index 0000000..5415a8e
> --- /dev/null
> +++ b/scripts/reformat_with_checkpatch.sh
> @@ -0,0 +1,141 @@
> +#!/bin/bash
> +# (c) 2014, Joe Perches <joe@...ches.com>
> +#
> +# Automate checkpatch modifications and git commits to
> +# neaten code that doesn't conform to CodingStyle.
> +# Useful primarily for files in drivers/staging
> +#
> +# Licensed under the terms of the GNU GPL License version 2
> +
> +declare -ar whitespace_types=(	\
> +    'whitespace_neatening:spacing,space_before_tab,pointer_location,trailing_whitespace,bracket_space'	\
> +    'remove_spaces_before_tabs:space_before_tab'		\
> +    'fix_label_positions:indented_label'		\
> +    'align_arguments_to_parenthesis:parenthesis_alignment'	\
> +)
> +
> +declare -ar changecode_types=(	\
> +    'fix_brace_positions:open_brace,braces,else_after_brace,while_after_brace'		\
> +    'fix_blank_lines:line_spacing'		\
> +    'use_standard_attributes:prefer_packed,prefer_aligned'		\
> +    'remove_unnecessary_externs:avoid_externs'		\
> +    'update_c90_comment_style:c99_comments'		\
> +)
> +
> +checkpatch_update ()
> +{
> +    file=$1
> +
> +    desc=$(echo $2 | cut -f1 -d: | sed 's/_/ /g')
> +    types=$(echo $2 | cut -f2- -d:)
> +
> +    echo "file: <$file> description: <$desc> types:<$types>"
> +
> +    ./scripts/checkpatch.pl --file --fix-inplace --strict --types="$types" $file
> +
> +    checkpatch_fixes=$file.diff
> +    git diff --stat -p --exit-code $file > $checkpatch_fixes
> +    if [ $? == 0 ] ; then
> +	rm -f $checkpatch_fixes
> +	return
> +    fi
> +
> +    basename=$(basename $file)
> +    if [ "${basename##*.}" == "c" ] ; then
> +
> +	git checkout $file
> +	obj="$(echo $file | sed 's/\.c$/\.o/')"
> +	if [ -e $obj ] ; then
> +	    rm -f $obj
> +	fi
> +
> +	echo "Compiling original version..."
> +
> +	${CROSS_COMPILE}make $obj

This fails for when a cflags option is set (like an include path).  Now,
I could argue that having an include path override in a kernel Makefile
is a bug, but well, it's staging...

Anyway, try running this script on
drivers/staging/lustre/lnet/lnet/acceptor.c to see how this build fails.

thanks,

greg k-h
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