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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119#!/bin/bash# SPDX-License-Identifier: GPL-2.0-only# Translate the bits making up a GFP mask# (c) 2009, Mel Gorman <mel@csn.ul.ie>SOURCE=GFPMASK=none
# Helper function to report failures and exitdie() { 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 argumentswhile [ $# -gt 0 ]; do case $1 in --source) SOURCE=$2 shift 2 ;; -h) usage ;; --help) usage ;; *) GFPMASK=$1 shift ;; esacdone
# Guess the kernel source directory if it's not set. Preference is in order of# o current directory# o /usr/src/linuxif [ "$SOURCE" = "" ]; then if [ -r "/usr/src/linux/Makefile" ]; then SOURCE=/usr/src/linux fi if [ -r "`pwd`/Makefile" ]; then SOURCE=`pwd` fifi
# Confirm that a source directory existsif [ ! -r "$SOURCE/Makefile" ]; then die "Could not locate kernel source directory or it is invalid"fi
# Confirm that a GFP mask has been specifiedif [ "$GFPMASK" = "none" ]; then usagefi
# Extract GFP flags from the kernel sourceTMPFILE=`mktemp -t gfptranslate-XXXXXX.c` || exit 1
echo Source: $SOURCEecho Parsing: $GFPMASK
( cat <<EOF#include <stdint.h>#include <stdio.h>
// Try to fool compiler.h into not including extra stuff#define __ASSEMBLY__ 1
#include <generated/autoconf.h>#include <linux/gfp_types.h>
static const char *masks[] = {EOF
sed -nEe 's/^[[:space:]]+(___GFP_.*)_BIT,.*$/\1/p' $SOURCE/include/linux/gfp_types.h | while read b; do cat <<EOF#if defined($b) && ($b > 0) [${b}_BIT] = "$b",#endifEOF done
cat <<EOF};
int main(int argc, char *argv[]){ unsigned long long mask = $GFPMASK;
for (int i = 0; i < sizeof(mask) * 8; i++) { unsigned long long bit = 1ULL << i; if (mask & bit) printf("\t%-25s0x%llx\n", (i < ___GFP_LAST_BIT && masks[i]) ? masks[i] : "*** INVALID ***", bit); }
return 0;}EOF) > $TMPFILE
${CC:-gcc} -Wall -o ${TMPFILE}.bin -I $SOURCE/include $TMPFILE && ${TMPFILE}.bin
rm -f $TMPFILE ${TMPFILE}.bin
exit 0