1 files changed, 81 insertions, 0 deletions

diff --git a/scripts/gfp-translate b/scripts/gfp-translate
new file mode 100644
index 000000000000..073cb6d152a0
--- /dev/null
+++ b/scripts/gfp-translate
@@ -0,0 +1,81 @@
+#!/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 arguements
+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 "^#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
+
+# 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