diff --git a/scripts/blockdev-perftest b/scripts/blockdev-perftest
index db240ef36..a00212cc3 100755
--- a/scripts/blockdev-perftest
+++ b/scripts/blockdev-perftest
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 ############################################################################
 #
diff --git a/scripts/generate-patched-kernel b/scripts/generate-patched-kernel
index a42990bcc..f24fc534d 100755
--- a/scripts/generate-patched-kernel
+++ b/scripts/generate-patched-kernel
@@ -24,13 +24,14 @@ function usage {
 }
 
 
-script_dir="$(dirname $0)"
+script_dir="$(dirname "$0")"
 if [ "${script_dir#/}" = "${script_dir}" ]; then
   script_dir="$PWD/$script_dir"
 fi
 scriptdir="${scriptdir%/.}"
 scst_dir="$(dirname "${script_dir}")"
 
+# shellcheck source=./kernel-functions
 source "${script_dir}/kernel-functions"
 
 if [ "$1" = "" ]; then
@@ -49,9 +50,9 @@ cd "${target}" || exit $?
 "${script_dir}/list-source-files" "${scst_dir}" |
   grep -- "-${kernel_version}.*.patch$" |
   grep -v /in-tree/ |
-  while read p; do
-    if [ "${p/readahead-2.6.32.below11.patch//}" = "$p" \
-         -o "${patchlevel:-0}" -lt 11 ]; then
+  while read -r p; do
+    if [ "${p/readahead-2.6.32.below11.patch//}" = "$p" ] ||
+       [ "${patchlevel:-0}" -lt 11 ]; then
       echo "==== $p"
       patch -p1 <"${scst_dir}/$p"
     fi
diff --git a/scripts/kernel-functions b/scripts/kernel-functions
index 0d19ae115..979b2f20f 100644
--- a/scripts/kernel-functions
+++ b/scripts/kernel-functions
@@ -1,4 +1,4 @@
-# -*- mode: shell-script -*-
+#!/bin/bash
 # Shell functions for parsing the Linux kernel version and for downloading
 # from kernel.org.
 
@@ -45,8 +45,8 @@ function download_file {
 # Make sure the kernel tarball and patch file are present in directory
 # ${kernel_downloads}. Download any missing files from ${kernel_mirror}.
 function download_kernel {
-  local kver="$(kernel_version $1)"
-  local plevel="$(patchlevel $1)"
+  local kver="$(kernel_version "$1")"
+  local plevel="$(patchlevel "$1")"
   local series="$1"
 
   case "${series:0:2}" in
@@ -57,7 +57,7 @@ function download_kernel {
   test -w "${kernel_downloads}" || return $?
   (
     cd "${kernel_downloads}" || return $?
-    if [ "$plevel" = "" -o "$plevel" = "0" ] ||
+    if [ "$plevel" = "" ] || [ "$plevel" = "0" ] ||
       download_file "${kernel_mirror}/v$series/patch-$1.xz"
     then
       download_file "${kernel_mirror}/v$series/linux-${kver}.tar.xz" ||
@@ -70,20 +70,20 @@ function download_kernel {
 }
 
 function extract_kernel_archive {
-  local kver="$(kernel_version $1)"
-  local plevel="$(patchlevel $1)"
+  local kver="$(kernel_version "$1")"
+  local plevel="$(patchlevel "$1")"
   local series="$1"
 
   if [ -e "${kernel_downloads}/linux-$1.tar.xz" ]; then
     xz -cd "${kernel_downloads}/linux-$1.tar.xz" | tar xf -
   elif [ -e "${kernel_downloads}/linux-$kver.tar.xz" ]; then
     xz -cd "${kernel_downloads}/linux-$kver.tar.xz" | tar xf - &&
-      mv linux-$kver linux-$1
+      mv "linux-$kver" "linux-$1"
   elif [ -e "${kernel_downloads}/linux-$1.tar.bz2" ]; then
     tar xjf "${kernel_downloads}/linux-$1.tar.bz2"
   elif [ -e "${kernel_downloads}/linux-$kver.tar.bz2" ]; then
     tar xjf "${kernel_downloads}/linux-$kver.tar.bz2" &&
-      mv linux-$kver linux-$1
+      mv "linux-$kver" "linux-$1"
   else
     return 1
   fi
@@ -92,24 +92,24 @@ function extract_kernel_archive {
 # Create a linux-$1 tree in the current directory, where $1 is a kernel
 # version number with either three or four components.
 function extract_kernel_tree {
-  local kver="$(kernel_version $1)"
-  local plevel="$(patchlevel $1)"
+  local kver="$(kernel_version "$1")"
+  local plevel="$(patchlevel "$1")"
   local tmpdir=kernel-tree-tmp-$$
 
   rm -rf "linux-$1" "${tmpdir}"
   mkdir "${tmpdir}" || return $?
   (
     cd "${tmpdir}" || return $?
-    if [ "$plevel" != "" -a "$plevel" != "0" -a \
-         -e "${kernel_downloads}/patch-$1.xz" ]; then
-      extract_kernel_archive $kver || return $?
-      mv linux-$kver linux-$1
-      ( cd linux-$1 && xz -cd "${kernel_downloads}/patch-$1.xz" \
+    if [ "$plevel" != "" ] && [ "$plevel" != "0" ] &&
+       [ -e "${kernel_downloads}/patch-$1.xz" ]; then
+      extract_kernel_archive "$kver" || return $?
+      mv "linux-$kver" "linux-$1"
+      ( cd "linux-$1" && xz -cd "${kernel_downloads}/patch-$1.xz" \
         | patch -p1 -f -s; ) \
         || return $?
     else
-	extract_kernel_archive $1 ||
-	{ extract_kernel_archive $kver && mv linux-$kver linux-$1; } ||
+	extract_kernel_archive "$1" ||
+	{ extract_kernel_archive "$kver" && mv "linux-$kver" "linux-$1"; } ||
 	return $?
     fi
     mv "linux-$1" ".." || return $?
@@ -120,7 +120,7 @@ function extract_kernel_tree {
 
 # Patch a kernel tree where $1 is the kernel version.
 function patch_kernel {
-    if [ "$1" = "2.6.29" -o "$1" = "2.6.29.1" -o "$1" = "2.6.29.2" -o "$1" = "2.6.29.3" ]
+    if [ "$1" = "2.6.29" ] || [ "$1" = "2.6.29.1" ] || [ "$1" = "2.6.29.2" ] || [ "$1" = "2.6.29.3" ]
     then
       patch -f -s -p1 <<'EOF'
 Make sure that branch profiling does not trigger sparse warnings.
@@ -177,7 +177,7 @@ See also http://lkml.org/lkml/2009/9/26/51
  	do {								\
 EOF
     fi
-    if [ "${1#2.6.32}" != "$1" -o "${1#2.6.33}" != "$1" ]
+    if [ "${1#2.6.32}" != "$1" ] || [ "${1#2.6.33}" != "$1" ]
     then
       patch -f -s -p1 <<'EOF'
 Get rid of sparse errors on sk_buff.protocol.
@@ -451,5 +451,10 @@ function download_and_extract_kernel_tree {
     else
 	download_kernel "$1" && extract_kernel_tree "$1"
     fi &&
-	(cd linux-$1 && patch_kernel "$1")
+	(cd "linux-$1" && patch_kernel "$1")
 }
+
+# For shellcheck
+if false; then
+    quiet_download=true
+fi
diff --git a/scripts/list-source-files b/scripts/list-source-files
index f4f00f80d..09550eed8 100755
--- a/scripts/list-source-files
+++ b/scripts/list-source-files
@@ -17,7 +17,7 @@ list_source_files() {
       grep -vE '^[D?]|^Performing|^$' | \
       cut -c3- | \
       while read -r a b c f; do
-        if [ -f "$f" -o -h "$f" ]; then
+        if [ -f "$f" ] || [ -h "$f" ]; then
 	  echo "$a $b $c" >/dev/null
 	  echo "$f"
         fi
@@ -39,7 +39,7 @@ list_source_files() {
       hg manifest
     fi
   else
-    ( cd "$d" && find -type f -o -type l | sed 's|^\./||' )
+    ( cd "$d" && find . -type f -o -type l | sed 's|^\./||' )
   fi
 }
 
diff --git a/scripts/monitor-interrupt-rate b/scripts/monitor-interrupt-rate
index cd47a181f..7e81ed9a5 100755
--- a/scripts/monitor-interrupt-rate
+++ b/scripts/monitor-interrupt-rate
@@ -6,11 +6,11 @@ echo "Interrupts per second:"
 while true
 do
   sum=0
-  while read line
+  while read -r line
   do
     for word in $line
     do
-      if [ "${word#[0-9]}" != "$word" -a "${word%[0-9]}" != "$word" ]; then
+      if [ "${word#[0-9]}" != "$word" ] && [ "${word%[0-9]}" != "$word" ]; then
         sum="$((sum + word))"
       fi
     done
diff --git a/scripts/monitor-memory-usage b/scripts/monitor-memory-usage
index e43cd6b12..eabb74dba 100755
--- a/scripts/monitor-memory-usage
+++ b/scripts/monitor-memory-usage
@@ -50,7 +50,7 @@ do
   esac
 done
 
-if [ "$#" != 0 -o "${interval}" -le 0 ]; then
+if [ "$#" != 0 ] || [ "${interval}" -le 0 ]; then
   usage
   exit 1
 fi
@@ -61,20 +61,20 @@ fi
 ####################
 
 printf "%-10s " "Time"
-cat /proc/meminfo \
-| while read label number unit
+cat /proc/meminfo |
+  while read -r label number unit
   do
-    printf " %10s" ${label%:}
+    printf " %10s" "${label%:}"
   done
 echo
 
 while true
 do
-  printf "%-10d" $(date +%s)
-  cat /proc/meminfo \
-  | while read label number unit
+  printf "%-10d" "$(date +%s)"
+  cat /proc/meminfo |
+    while read -r label number unit
     do
-      printf " %10d" ${number}
+      printf " %10d" "${number}"
     done
   echo
   sleep "${interval}"
diff --git a/scripts/run-regression-tests b/scripts/run-regression-tests
index 5b1f34452..0ba6ce7e2 100755
--- a/scripts/run-regression-tests
+++ b/scripts/run-regression-tests
@@ -55,7 +55,7 @@
 ########################
 
 # shellcheck source=./kernel-functions
-source $(dirname $0)/kernel-functions
+source "$(dirname "$0")/kernel-functions"
 
 function usage {
   echo "Usage: $0 [-c <dir>] [-d <dir>] [-f] [-h] [-j <jobs>] [-p <patchdir>] [-q] <kver1> <kver2> ..."
@@ -697,7 +697,7 @@ do
   if [ "${run_smatch}" = "true" ]; then
     run_smatch "$k" "${subdirs[@]}"
   fi
-  if [ "${qla2x00t}" = "true" ] && $(kernel_version_le 2.6.37 $k); then
+  if [ "${qla2x00t}" = "true" ] && kernel_version_le 2.6.37 "$k"; then
     subdirs+=(drivers/scsi/qla2xxx)
   fi
   compile_kernel "$k" "${subdirs[@]}"
diff --git a/scripts/update-version b/scripts/update-version
index 7735be978..ab2310ccc 100755
--- a/scripts/update-version
+++ b/scripts/update-version
@@ -2,11 +2,11 @@
 # Update the version number in SCST source files.
 
 usage() {
-    echo "Usage: $(basename $0) <major> <minor> <release> [<suffix>]"
+    echo "Usage: $(basename "$0") <major> <minor> <release> [<suffix>]"
     exit 1
 }
 
-if [ $# != 3 -a $# != 4 ]; then
+if [ $# != 3 ] && [ $# != 4 ]; then
    usage
 fi