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>
8 # Helper function to report failures and exit
11 if [ "$TMPFILE" != "" ]; then
18 echo "usage: gfp-translate [-h] [ --source DIRECTORY ] gfpmask"
22 # Parse command-line arguments
23 while [ $# -gt 0 ]; do
42 # Guess the kernel source directory if it's not set. Preference is in order of
45 if [ "$SOURCE" = "" ]; then
46 if [ -r "/usr/src/linux/Makefile" ]; then
49 if [ -r "`pwd`/Makefile" ]; then
54 # Confirm that a source directory exists
55 if [ ! -r "$SOURCE/Makefile" ]; then
56 die "Could not locate kernel source directory or it is invalid"
59 # Confirm that a GFP mask has been specified
60 if [ "$GFPMASK" = "none" ]; then
64 # Extract GFP flags from the kernel source
65 TMPFILE=`mktemp -t gfptranslate-XXXXXX` || exit 1
66 grep -q ___GFP $SOURCE/include/linux/gfp.h
68 grep "^#define ___GFP" $SOURCE/include/linux/gfp.h | sed -e 's/u$//' | grep -v GFP_BITS > $TMPFILE
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
77 echo Parsing: $GFPMASK
78 for LINE in `cat $TMPFILE`; do
79 MASK=`echo $LINE | awk '{print $3}'`
80 if [ $(($GFPMASK&$MASK)) -ne 0 ]; then