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86 lines
1.7 KiB
86 lines
1.7 KiB
#!/bin/bash |
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# SPDX-License-Identifier: GPL-2.0-only |
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# Translate the bits making up a GFP mask |
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# (c) 2009, Mel Gorman <[email protected]> |
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SOURCE= |
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GFPMASK=none |
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# Helper function to report failures and exit |
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die() { |
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echo ERROR: $@ |
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if [ "$TMPFILE" != "" ]; then |
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rm -f $TMPFILE |
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fi |
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exit -1 |
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} |
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usage() { |
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echo "usage: gfp-translate [-h] [ --source DIRECTORY ] gfpmask" |
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exit 0 |
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} |
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# Parse command-line arguments |
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while [ $# -gt 0 ]; do |
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case $1 in |
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--source) |
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SOURCE=$2 |
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shift 2 |
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;; |
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-h) |
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usage |
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;; |
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--help) |
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usage |
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;; |
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*) |
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GFPMASK=$1 |
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shift |
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;; |
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esac |
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done |
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# Guess the kernel source directory if it's not set. Preference is in order of |
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# o current directory |
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# o /usr/src/linux |
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if [ "$SOURCE" = "" ]; then |
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if [ -r "/usr/src/linux/Makefile" ]; then |
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SOURCE=/usr/src/linux |
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fi |
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if [ -r "`pwd`/Makefile" ]; then |
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SOURCE=`pwd` |
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fi |
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fi |
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# Confirm that a source directory exists |
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if [ ! -r "$SOURCE/Makefile" ]; then |
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die "Could not locate kernel source directory or it is invalid" |
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fi |
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# Confirm that a GFP mask has been specified |
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if [ "$GFPMASK" = "none" ]; then |
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usage |
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fi |
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# Extract GFP flags from the kernel source |
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TMPFILE=`mktemp -t gfptranslate-XXXXXX` || exit 1 |
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grep -q ___GFP $SOURCE/include/linux/gfp.h |
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if [ $? -eq 0 ]; then |
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grep "^#define ___GFP" $SOURCE/include/linux/gfp.h | sed -e 's/u$//' | grep -v GFP_BITS > $TMPFILE |
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else |
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grep "^#define __GFP" $SOURCE/include/linux/gfp.h | sed -e 's/(__force gfp_t)//' | sed -e 's/u)/)/' | grep -v GFP_BITS | sed -e 's/)\//) \//' > $TMPFILE |
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fi |
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# Parse the flags |
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IFS=" |
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" |
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echo Source: $SOURCE |
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echo Parsing: $GFPMASK |
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for LINE in `cat $TMPFILE`; do |
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MASK=`echo $LINE | awk '{print $3}'` |
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if [ $(($GFPMASK&$MASK)) -ne 0 ]; then |
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echo $LINE |
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fi |
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done |
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rm -f $TMPFILE |
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exit 0
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