Fix shellcheck warning such as
"Double quote to prevent globbing and word splitting." and
Use $(...) notation instead of legacy backticks `...`.

Signed-off-by: Madhavan Srinivasan <ma...@linux.ibm.com>
---
 arch/powerpc/boot/install.sh | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/arch/powerpc/boot/install.sh b/arch/powerpc/boot/install.sh
index 101fcb397a0f..c3df6c27ce75 100755
--- a/arch/powerpc/boot/install.sh
+++ b/arch/powerpc/boot/install.sh
@@ -19,19 +19,19 @@
 set -e
 
 # this should work for both the pSeries zImage and the iSeries vmlinux.sm
-image_name=`basename $2`
+image_name=$(basename "$2")
 
 
 echo "Warning: '${INSTALLKERNEL}' command not available... Copying" \
      "directly to $4/$image_name-$1" >&2
 
-if [ -f $4/$image_name-$1 ]; then
-       mv $4/$image_name-$1 $4/$image_name-$1.old
+if [ -f "$4"/"$image_name"-"$1" ]; then
+       mv "$4"/"$image_name"-"$1" "$4"/"$image_name"-"$1".old
 fi
 
-if [ -f $4/System.map-$1 ]; then
-       mv $4/System.map-$1 $4/System-$1.old
+if [ -f "$4"/System.map-"$1" ]; then
+       mv "$4"/System.map-"$1" "$4"/System-"$1".old
 fi
 
-cat $2 > $4/$image_name-$1
-cp $3 $4/System.map-$1
+cat "$2" > "$4"/"$image_name"-"$1"
+cp "$3" "$4"/System.map-"$1"
-- 
2.49.0


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