linux-yocto/scripts/gfp-translate

#!/bin/bash

Translate the bits making up a GFP mask

(c) 2009, Mel Gorman mel@csn.ul.ie

Licensed under the terms of the GNU GPL License version 2

SOURCE= GFPMASK=none

Helper function to report failures and exit

die() { echo ERROR: $@ if [ "$TMPFILE" != "" ]; then rm -f $TMPFILE fi exit -1 }

usage() { echo "usage: gfp-translate [-h] [ --source DIRECTORY ] gfpmask" exit 0 }

Parse command-line arguments

while [ $# -gt 0 ]; do case $1 in --source) SOURCE=$2 shift 2 ;; -h) usage ;; --help) usage ;; *) GFPMASK=$1 shift ;; esac done

Guess the kernel source directory if it's not set. Preference is in order of

o current directory

o /usr/src/linux

if [ "$SOURCE" = "" ]; then if [ -r "/usr/src/linux/Makefile" ]; then SOURCE=/usr/src/linux fi if [ -r "pwd/Makefile" ]; then SOURCE=pwd fi fi

Confirm that a source directory exists

if [ ! -r "$SOURCE/Makefile" ]; then die "Could not locate kernel source directory or it is invalid" fi

Confirm that a GFP mask has been specified

if [ "$GFPMASK" = "none" ]; then usage fi

Extract GFP flags from the kernel source

TMPFILE=mktemp -t gfptranslate-XXXXXX || exit 1 grep -q ___GFP $SOURCE/include/linux/gfp.h if [ $? -eq 0 ]; then grep "^#define ___GFP" $SOURCE/include/linux/gfp.h | sed -e 's/u$//' | grep -v GFP_BITS > $TMPFILE else 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 fi

Parse the flags

IFS=" " echo Source: $SOURCE echo Parsing: $GFPMASK for LINE in cat $TMPFILE; do MASK=echo $LINE | awk '{print $3}' if [ $(($GFPMASK&$MASK)) -ne 0 ]; then echo $LINE fi done

rm -f $TMPFILE exit 0