1#!/bin/bash 2# SPDX-License-Identifier: GPL-2.0-only 3# Translate the bits making up a GFP mask 4# (c) 2009, Mel Gorman <mel@csn.ul.ie> 5SOURCE= 6GFPMASK=none 7 8# Helper function to report failures and exit 9die() { 10 echo ERROR: $@ 11 if [ "$TMPFILE" != "" ]; then 12 rm -f $TMPFILE 13 fi 14 exit -1 15} 16 17usage() { 18 echo "usage: gfp-translate [-h] [ --source DIRECTORY ] gfpmask" 19 exit 0 20} 21 22# Parse command-line arguments 23while [ $# -gt 0 ]; do 24 case $1 in 25 --source) 26 SOURCE=$2 27 shift 2 28 ;; 29 -h) 30 usage 31 ;; 32 --help) 33 usage 34 ;; 35 *) 36 GFPMASK=$1 37 shift 38 ;; 39 esac 40done 41 42# Guess the kernel source directory if it's not set. Preference is in order of 43# o current directory 44# o /usr/src/linux 45if [ "$SOURCE" = "" ]; then 46 if [ -r "/usr/src/linux/Makefile" ]; then 47 SOURCE=/usr/src/linux 48 fi 49 if [ -r "`pwd`/Makefile" ]; then 50 SOURCE=`pwd` 51 fi 52fi 53 54# Confirm that a source directory exists 55if [ ! -r "$SOURCE/Makefile" ]; then 56 die "Could not locate kernel source directory or it is invalid" 57fi 58 59# Confirm that a GFP mask has been specified 60if [ "$GFPMASK" = "none" ]; then 61 usage 62fi 63 64# Extract GFP flags from the kernel source 65TMPFILE=`mktemp -t gfptranslate-XXXXXX` || exit 1 66grep -q ___GFP $SOURCE/include/linux/gfp.h 67if [ $? -eq 0 ]; then 68 grep "^#define ___GFP" $SOURCE/include/linux/gfp.h | sed -e 's/u$//' | grep -v GFP_BITS > $TMPFILE 69else 70 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 71fi 72 73# Parse the flags 74IFS=" 75" 76echo Source: $SOURCE 77echo Parsing: $GFPMASK 78for LINE in `cat $TMPFILE`; do 79 MASK=`echo $LINE | awk '{print $3}'` 80 if [ $(($GFPMASK&$MASK)) -ne 0 ]; then 81 echo $LINE 82 fi 83done 84 85rm -f $TMPFILE 86exit 0 87