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author | Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> | 2007-08-25 09:45:28 +0200 |
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committer | Sam Ravnborg <sam@neptun.(none)> | 2007-10-12 21:13:50 +0200 |
commit | 0bce67352b580e9025059ecc71e13e0ffd281254 (patch) | |
tree | 1528e7fbeed10b04b3013a9dffb26acf28c1aee4 /scripts/checkkconfigsymbols.sh | |
parent | aa1e5ef5c1d95e7ebf0821d9ba27debe43a87a22 (diff) | |
download | kernel_samsung_aries-0bce67352b580e9025059ecc71e13e0ffd281254.zip kernel_samsung_aries-0bce67352b580e9025059ecc71e13e0ffd281254.tar.gz kernel_samsung_aries-0bce67352b580e9025059ecc71e13e0ffd281254.tar.bz2 |
kbuild: script to check for undefined Kconfig symbols
To avoid having to look manually for used but undefined Kconfig variables,
I've written a script which tries do this efficiently, in case all other
attention fail. It accounts for _MODULE suffix and for UML_ prefixes to
Kconfig variable, but otherwise looks for exact matches (i.e. \<CONFIG_;
this is done to exclude macros like MMCONFIG_).
Undefined Kconfig variables should be not be removed without care, but for
instance arch/i386/boot/ uses a bunch of undefined Kconfig vars:
$ scripts/checkunknowndefines.sh arch/i386/boot/
arch/i386/boot/video.h uses undefined symbol VIDEO_400_HACK
arch/i386/boot/video-vga.c uses undefined symbol VIDEO_400_HACK
arch/i386/boot/video.c uses undefined symbol VIDEO_RETAIN
arch/i386/boot/video.h uses undefined symbol VIDEO_RETAIN
arch/i386/boot/video.h uses undefined symbol VIDEO_SVGA
arch/i386/boot/video.h uses undefined symbol VIDEO_VESA
arch/i386/boot/video-vesa.c uses undefined symbol VIDEO_VESA
It should also be mentioned in SubmittingPatches and SubmitChecklist.
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Cc: Roman Zippel <zippel@linux-m68k.org>
Cc: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Diffstat (limited to 'scripts/checkkconfigsymbols.sh')
-rwxr-xr-x | scripts/checkkconfigsymbols.sh | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/scripts/checkkconfigsymbols.sh b/scripts/checkkconfigsymbols.sh new file mode 100755 index 0000000..39677c8 --- /dev/null +++ b/scripts/checkkconfigsymbols.sh @@ -0,0 +1,59 @@ +#!/bin/sh +# Find Kconfig variables used in source code but never defined in Kconfig +# Copyright (C) 2007, Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> + +# Tested with dash. +paths="$@" +[ -z "$paths" ] && paths=. + +# Doing this once at the beginning saves a lot of time, on a cache-hot tree. +Kconfigs="`find . -name 'Kconfig' -o -name 'Kconfig*[^~]'`" + +echo -e "File list \tundefined symbol used" +find $paths -name '*.[chS]' -o -name 'Makefile' -o -name 'Makefile*[^~]'| while read i +do + # Output the bare Kconfig variable and the filename; the _MODULE part at + # the end is not removed here (would need perl an not-hungry regexp for that). + sed -ne 's!^.*\<\(UML_\)\?CONFIG_\([0-9A-Z_]\+\).*!\2 '$i'!p' < $i +done | \ +# Smart "sort|uniq" implemented in awk and tuned to collect the names of all +# files which use a given symbol +awk '{map[$1, count[$1]++] = $2; } +END { + for (combIdx in map) { + split(combIdx, separate, SUBSEP); + # The value may have been removed. + if (! ( (separate[1], separate[2]) in map ) ) + continue; + symb=separate[1]; + printf "%s ", symb; + #Use gawk extension to delete the names vector + delete names; + #Portably delete the names vector + #split("", names); + for (i=0; i < count[symb]; i++) { + names[map[symb, i]] = 1; + # Unfortunately, we may still encounter symb, i in the + # outside iteration. + delete map[symb, i]; + } + i=0; + for (name in names) { + if (i > 0) + printf ", %s", name; + else + printf "%s", name; + i++; + } + printf "\n"; + } +}' | +while read symb files; do + # Remove the _MODULE suffix when checking the variable name. This should + # be done only on tristate symbols, actually, but Kconfig parsing is + # beyond the purpose of this script. + symb_bare=`echo $symb | sed -e 's/_MODULE//'` + if ! grep -q "\<$symb_bare\>" $Kconfigs; then + echo -e "$files: \t$symb" + fi +done|sort |