diff --git a/qla2x00t-32gbit/extract-qla2xxx-orig b/qla2x00t-32gbit/extract-qla2xxx-orig
index 59aba4837..c969fbf49 100755
--- a/qla2x00t-32gbit/extract-qla2xxx-orig
+++ b/qla2x00t-32gbit/extract-qla2xxx-orig
@@ -1,6 +1,6 @@
 #!/bin/bash
 
-source ../scripts/kernel-functions
+source "$(dirname "$0")/../scripts/kernel-functions" || exit $?
 
 #########################
 # Argument verification #
@@ -15,7 +15,8 @@ fi
 
 mkdir -p qla2xxx-orig
 cd qla2xxx-orig || exit $?
-download_and_extract_kernel_tree "${kernel_version}"
+download_and_extract_kernel_tree "${kernel_version}" || exit $?
+kernel_version=${kernel_version/^*}
 touch "linux-${kernel_version}"/drivers/scsi/qla2xxx/*
 rm -rf "${kernel_version}"
 mkdir -p "${kernel_version}/include/trace/events"
diff --git a/qla2x00t-32gbit/generate-in-tree-patches b/qla2x00t-32gbit/generate-in-tree-patches
index 9b8c8d2ce..bcc5db2eb 100755
--- a/qla2x00t-32gbit/generate-in-tree-patches
+++ b/qla2x00t-32gbit/generate-in-tree-patches
@@ -2,15 +2,17 @@
 
 kernel_version="$1"
 
-if [ "$1" = "" ]; then
+if [ "$kernel_version" = "" ]; then
   echo "Error: missing kernel version argument."
   exit 1
 fi
 
-if [ ! -e qla2xxx-orig/$1 ]; then
-  ./extract-qla2xxx-orig "$1"
+if [ ! -e qla2xxx-orig/${kernel_version/^*} ]; then
+  "$(dirname "$0")/extract-qla2xxx-orig" "$kernel_version" || exit $?
 fi
 
+kernel_version=${kernel_version/^*}
+
 mkdir -p in-tree-patches/"${kernel_version}"
 
 for g in Kconfig *.[ch]; do
diff --git a/qla2x00t/extract-qla2xxx-orig b/qla2x00t/extract-qla2xxx-orig
index ac9d5f0b4..2f9e8c3cf 100755
--- a/qla2x00t/extract-qla2xxx-orig
+++ b/qla2x00t/extract-qla2xxx-orig
@@ -1,6 +1,6 @@
 #!/bin/bash
 
-source ../scripts/kernel-functions
+source "$(dirname "$0")/../scripts/kernel-functions" || exit $?
 
 #########################
 # Argument verification #
@@ -15,7 +15,8 @@ fi
 
 mkdir -p qla2xxx-orig
 cd qla2xxx-orig || exit $?
-download_and_extract_kernel_tree "${kernel_version}"
+download_and_extract_kernel_tree "${kernel_version}" || exit $?
+kernel_version=${kernel_version/^*}
 touch "linux-${kernel_version}"/drivers/scsi/qla2xxx/*
 rm -rf "${kernel_version}"
 mkdir -p "${kernel_version}"
diff --git a/qla2x00t/generate-in-tree-patches b/qla2x00t/generate-in-tree-patches
index 239484e8a..5d57317a1 100755
--- a/qla2x00t/generate-in-tree-patches
+++ b/qla2x00t/generate-in-tree-patches
@@ -2,15 +2,17 @@
 
 kernel_version="$1"
 
-if [ "$1" = "" ]; then
+if [ "$kernel_version" = "" ]; then
   echo "Error: missing kernel version argument."
   exit 1
 fi
 
-if [ ! -e qla2xxx-orig/$1 ]; then
-  ./extract-qla2xxx-orig "$1"
+if [ ! -e qla2xxx-orig/${kernel_version/^*} ]; then
+  "$(dirname "$0")/extract-qla2xxx-orig" "$kernel_version" || exit $?
 fi
 
+kernel_version=${kernel_version/^*}
+
 mkdir -p in-tree-patches/"${kernel_version}"
 
 for g in Kconfig *.[ch]; do
diff --git a/scripts/generate-kernel-patch b/scripts/generate-kernel-patch
index 1d44badf5..91bd9bc25 100755
--- a/scripts/generate-kernel-patch
+++ b/scripts/generate-kernel-patch
@@ -105,6 +105,21 @@ EOF
 # Run the script specialize_patch with appropriate options on the patch
 # passed via stdin and send the specialized patch to stdout.
 function specialize_patch {
+  local arr ao
+  readarray -d ^ -t arr <<<"$1^^^^"
+  local kver=${arr[0]}
+  local distro=${arr[1]}
+  local release=${arr[2]}
+  readarray -d . -t arr <<<"$release..."
+  local releasevermajor="${arr[0]}"
+  local releaseverminor="${arr[1]}"
+  if [ -n "$releasevermajor" ]; then
+      ao=(
+	  -v RHEL_MAJOR=$releasevermajor
+	  -v RHEL_MINOR=$releaseverminor
+	  -v RHEL_RELEASE_CODE=$((releasevermajor * 256 + releaseverminor))
+      )
+  fi
   if [ "${enable_specialize}" = "true" ]; then
     if [ "${generating_upstream_patch}" = "true" ]; then
       scripts/filter-trace-entry-exit
@@ -113,14 +128,14 @@ function specialize_patch {
     fi |
     "$(dirname "$0")/specialize-patch" \
          "${specialize_patch_options[@]}" \
-         -v kernel_version="${kver3}" \
-         -v SCST_IO_CONTEXT="${scst_io_context}"
+         -v kernel_version="${kver/-*}" \
+         -v SCST_IO_CONTEXT="${scst_io_context}" "${ao[@]}"
   else
     cat
   fi
 }
 
-# Read a patch from stdin, specialize it for kernel version ${kver}
+# Read a patch from stdin, specialize it for kernel version ${full_kver}
 # and write the output either to stdout or to the file $1 (if not empty),
 # depending on the value of the variable ${multiple_patches}.
 function process_patch {
@@ -132,7 +147,7 @@ function process_patch {
       fi
       tmppatch="$(/bin/mktemp)"
       (
-        specialize_patch
+        specialize_patch "${full_kver}"
       ) >"${tmppatch}"
       touch "${tmppatch}"
       {
@@ -151,7 +166,7 @@ function process_patch {
       true
     fi
   else
-    specialize_patch
+    specialize_patch "${full_kver}"
   fi
 }
 
@@ -208,6 +223,7 @@ if [ $# != 1 ]; then
 fi
 
 # Strip patch level from the kernel version number.
+full_kver="$1"
 kver="$(kernel_version "$1")"
 # kver3: first three components of the version number.
 if [ "${1#2.}" != "$1" ]; then
@@ -507,7 +523,7 @@ add_file "iscsi-scst/README_in-tree" "Documentation/scst/README.iscsi" \
 
 if [ "${qla2x00t}" = "true" ]; then
 
-  ( cd qla2x00t && ./generate-in-tree-patches "$1" )
+  ( cd qla2x00t && "$PWD/generate-in-tree-patches" "$1" ) || exit $?
 
   for f in qla2x00t/in-tree-patches/"$1"/*.patch; do
     [ -e "$f" ] || continue
@@ -533,7 +549,7 @@ if [ "${qla2x00t}" = "true" ]; then
 
 elif [ "${qla2x00t_32gbit}" = "true" ]; then
 
-  ( cd qla2x00t-32gbit && ./generate-in-tree-patches "$1" )
+  ( cd qla2x00t-32gbit && "$PWD/generate-in-tree-patches" "$1" ) || exit $?
 
   for f in qla2x00t-32gbit/in-tree-patches/"$1"/*.patch; do
     [ -e "$f" ] || continue
diff --git a/scripts/kernel-functions b/scripts/kernel-functions
index 87f75119e..704761339 100644
--- a/scripts/kernel-functions
+++ b/scripts/kernel-functions
@@ -2,6 +2,9 @@
 # Shell functions for parsing the Linux kernel version and for downloading
 # from kernel.org.
 
+# shellcheck source=./rhel-rpm-functions
+source "$(dirname "$0")/../scripts/rhel-rpm-functions" || return $?
+
 kernel_mirror="http://cdn.kernel.org/pub/linux/kernel"
 kernel_downloads="$HOME/software/downloads"
 kernel_tree="$HOME/software/linux-kernel"
@@ -435,10 +438,37 @@ EOF
     done
 }
 
+function download_and_extract_distro_rpm {
+    [ -n "$1" ] || return $?
+    local arr
+    readarray -d ^ -t arr <<<"$1^^^^"
+    local kver=${arr[0]}
+    local distro=${arr[1]}
+    local release=${arr[2]}
+    (
+	cd "${kernel_downloads}" || exit $?
+	urls=($(get_srpm_urls "$distro" "$release" x86_64))
+	for url in "${urls[@]}"; do
+	    wget -q -nc "${url}/kernel-${kver}.src.rpm" && break
+	done
+    )
+    local tmpdir=kernel-tree-tmp-$$
+    rm -rf "linux-$1" "${tmpdir}"
+    mkdir "${tmpdir}" || return $?
+    (
+	cd "${tmpdir}" &&
+	    rpm2cpio "${kernel_downloads}/kernel-${kver}.src.rpm" |
+		cpio -i --make-directories --quiet &&
+	    tar xaf linux-${kver}.tar.* &&
+	    mv "linux-${kver}" ".." &&
+	    cd "../linux-${kver}"
+    ) || return $?
+    rm -rf "${tmpdir}"
+}
+
 function download_and_extract_kernel_tree {
     if [ -e "${kernel_tree}" ]; then
-	rm -rf "linux-$1"
-	mkdir "linux-$1"
+	{ [ "${1/^}" = "$1" ] &&
 	(
 	    cd "${kernel_tree}" &&
 		{
@@ -450,12 +480,17 @@ function download_and_extract_kernel_tree {
 			    git fetch stable
 			}
 		} &&
+		{ git tag -l "v$1" | grep -q '^v'; } &&
 		git archive "v$1"
-	) | tar -C "linux-$1" -xf-
+	) | {
+	    rm -rf "linux-$1" &&
+		mkdir "linux-$1" &&
+		tar -C "linux-$1" -xf- 2>/dev/null
+	}; } || download_and_extract_distro_rpm "$1"
     else
 	download_kernel "$1" && extract_kernel_tree "$1"
     fi &&
-	(cd "linux-$1" && patch_kernel "$1")
+	(cd "linux-${1/^*}" && patch_kernel "${1/^*}")
 }
 
 # For shellcheck
diff --git a/scripts/rhel-rpm-functions b/scripts/rhel-rpm-functions
new file mode 100644
index 000000000..ffccee089
--- /dev/null
+++ b/scripts/rhel-rpm-functions
@@ -0,0 +1,112 @@
+# -*- mode: shell-script -*-
+# Shell functions for downloading and extracting a RHEL or RHEL clone RPM
+
+# Arguments:
+# $1: Linux distribution name
+# $2: Linux distribution version (major.minor)
+# $3: architecture
+function get_srpm_urls() {
+    local arch distro releasever releasevermajor releaseverminor
+
+    distro="$1"
+    releasever="$2"
+    arch="$3"
+    IFS=.
+    set -- "$2"
+    unset IFS
+    releasevermajor="$1"
+    releaseverminor="$2"
+
+    case "$distro" in
+	"CentOS"*)
+	    case $releasever in
+		5.*|6.[01])
+		    echo "http://vault.centos.org/${releasever}/os/SRPMS"
+		    echo "http://vault.centos.org/${releasever}/updates/SRPMS";;
+		[67]*)
+		    echo "http://vault.centos.org/${releasever}/os/Source/SPackages"
+		    echo "http://vault.centos.org/${releasever}/updates/Source/SPackages";;
+		8*)
+		    echo "http://vault.centos.org/${releasever}/BaseOS/Source/SPackages/";;
+	    esac
+	    ;;
+	"Red Hat Enterprise Linux"*)
+	    case $releasever in
+		[56].*)
+		    echo "http://ftp.redhat.com/pub/redhat/linux/enterprise/${releasevermajor}Server/en/os/SRPMS"
+		    echo "http://ftp.redhat.com/redhat/rhel/rc/7/Server/source/tree/Packages";;
+	    esac
+	    ;;
+	"Oracle Linux Server")
+	    echo "http://public-yum.oracle.com/repo/OracleLinux/OL${releasevermajor}/${releaseverminor}/base/${arch}/getPackageSource"
+	    echo "http://public-yum.oracle.com/repo/OracleLinux/OL${releasevermajor}/latest/${arch}/getPackageSource"
+	    echo "http://public-yum.oracle.com/repo/OracleLinux/OL${releasevermajor}/UEK/latest/${arch}/getPackageSource"
+	    ;;
+	"Scientific Linux")
+	    case $releasever in
+		5.*)
+		    echo "http://ftp.scientificlinux.org/linux/scientific/$releasevermajor$releaseverminor/SRPMS/vendor";;
+		6.*)
+		    echo "http://ftp.scientificlinux.org/linux/scientific/$releasever/SRPMS/vendor";;
+	    esac
+	    ;;
+	*)
+	    echo "Unknown type of distribution: $distro" >&2
+	    return 1
+	    ;;
+    esac
+}
+
+# Arguments:
+# $1: Linux distribution name
+# $2: Linux distribution version (major.minor)
+# $3: architecture
+function get_rpm_urls() {
+    local arch distro releasever releasevermajor releaseverminor
+
+    distro="$1"
+    releasever="$2"
+    arch="$3"
+    IFS=.
+    set -- "$2"
+    unset IFS
+    releasevermajor="$1"
+    releaseverminor="$2"
+
+    case "$distro" in
+	"CentOS"*)
+	    case $releasever in
+		5.*)
+		    echo "http://vault.centos.org/${releasever}/os/${arch}/CentOS http://vault.centos.org/${releasever}/updates/${arch}/RPMS";;
+		6.[01])
+		    echo "http://vault.centos.org/${releasever}/os/${arch}/Packages"
+		    echo "http://vault.centos.org/${releasever}/updates/${arch}/Packages";;
+		[67]*)
+		    echo "https://mirrors.edge.kernel.org/centos/${releasever}/updates/${arch}/Packages"
+		    echo "http://vault.centos.org/${releasever}/updates/${arch}/Packages"
+		    echo "http://vault.centos.org/${releasever}/os/${arch}/Packages http://vault.centos.org/${releasever}/updates/${arch}/Packages";;
+		8*)
+		    echo "https://mirrors.edge.kernel.org/centos/8-stream/BaseOS/${arch}/os/Packages";;
+	    esac
+	    ;;
+	"Red Hat Enterprise Linux"*)
+	    echo "";;
+	"Oracle Linux Server")
+	    echo "http://public-yum.oracle.com/repo/OracleLinux/OL${releasevermajor}/${releaseverminor}/base/${arch}/getPackageSource"
+	    echo "http://public-yum.oracle.com/repo/OracleLinux/OL${releasevermajor}/latest/${arch}/getPackageSource"
+	    echo "http://public-yum.oracle.com/repo/OracleLinux/OL${releasevermajor}/UEK/latest/${arch}/getPackageSource"
+	    ;;
+	"Scientific Linux")
+	    case $releasever in
+		5.*)
+		    echo "http://ftp.scientificlinux.org/linux/scientific/$releasevermajor$releaseverminor/SRPMS/vendor";;
+		6.*)
+		    echo "http://ftp.scientificlinux.org/linux/scientific/$releasever/SRPMS/vendor";;
+	    esac
+	    ;;
+	*)
+	    echo "Unknown distribution type: $distro" >&2
+	    return 1
+	    ;;
+    esac
+}
diff --git a/scripts/run-regression-tests b/scripts/run-regression-tests
index fa669dc4c..cb9a4362d 100755
--- a/scripts/run-regression-tests
+++ b/scripts/run-regression-tests
@@ -4,7 +4,7 @@
 #
 # Script for running those SCST regression tests that can be run automatically.
 #
-# Copyright (C) 2008-2009 Bart Van Assche <bvanassche@acm.org>
+# Copyright (C) 2008-2020 Bart Van Assche <bvanassche@acm.org>
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License
@@ -199,22 +199,23 @@ function compile_scst_patched {
 }
 
 # Generate a kernel patch from the SCST source tree for kernel version $1
-# and with generate-kernel-patch options $2.
+# and with generate-kernel-patch options $2. $1 may be a
+# ${kver}^${distro}^${release} triplet.
 function generate_kernel_patch {
   local kver
-  local patchfile="${outputdir}/scst-$1-kernel.patch"
-  local patchfile_m="${outputdir}/scst-$1-kernel-matching-line-numbers.patch"
+  local patchfile="${outputdir}/scst-${1/^*}-kernel.patch"
+  local patchfile_m="${outputdir}/scst-${1/^*}-kernel-matching-line-numbers.patch"
   local driver_options=""
 
-  kver="$(kernel_version "$1")"
+  kver="$(kernel_version "${1/^*}")"
   driver_options=(-l)
   [ "${mpt_scst}" = "true" ] && driver_options+=("-m")
 
-  "${scriptsdir}"/generate-kernel-patch "${driver_options[@]}" "$2" "$1" > "${patchfile}"
+  "${scriptsdir}"/generate-kernel-patch "${driver_options[@]}" $2 "$1" > "${patchfile}"
 
-  "${scriptsdir}"/generate-kernel-patch "${driver_options[@]}" -n "$2" "$1" > "${patchfile_m}"
+  "${scriptsdir}"/generate-kernel-patch "${driver_options[@]}" -n $2 "$1" > "${patchfile_m}"
 
-  "${scriptsdir}"/generate-kernel-patch "${driver_options[@]}" -p "${outputdir}/${patchdir}" "$2" "$1"
+  "${scriptsdir}"/generate-kernel-patch "${driver_options[@]}" -p "${outputdir}/${patchdir}" $2 "$1"
 }
 
 # Run checkpatch on the generated kernel patch. Assumes that there is a
@@ -267,6 +268,7 @@ CONFIG_BINARY_PRINTF				\
 CONFIG_BLK_DEV_IO_TRACE				\
 CONFIG_BRANCH_PROFILE_NONE			\
 CONFIG_CONTEXT_SWITCH_TRACER			\
+CONFIG_DEBUG_SECTION_MISMATCH			\
 CONFIG_DEBUG_STRICT_USER_COPY_CHECKS		\
 CONFIG_DYNAMIC_FTRACE				\
 CONFIG_EVENT_TRACE_TEST_SYSCALLS		\
@@ -292,6 +294,7 @@ CONFIG_MMIOTRACE				\
 CONFIG_NET_DROP_MONITOR				\
 CONFIG_NOP_TRACER				\
 CONFIG_RETPOLINE				\
+CONFIG_RH_KABI_SIZE_ALIGN_CHECKS		\
 CONFIG_SCHED_TRACER				\
 CONFIG_SECURITY_SELINUX				\
 CONFIG_STACK_TRACER				\
@@ -630,7 +633,7 @@ do
   run_smatch="true"
   ipv6="true"
   global_multiple_patches="${multiple_patches}"
-  while [ "${kv%-?}" != "${kv}" ] || [ "${kv%-??}" != "${kv}" ]; do
+  while true; do
     kv_without_opt="${kv%-?}"
     if [ "${kv_without_opt}" = "${kv}" ]; then
       kv_without_opt="${kv%-??}"
@@ -645,7 +648,7 @@ do
       '-nm') run_smatch="false";;
       '-u')  generate_kernel_patch_options="-u";;
       '-p')  multiple_patches="true";;
-      *)     echo "Error: unknown option ${kopt}."; exit 1;;
+      *)     break;;
     esac
     kv="${kv_without_opt}"
   done
@@ -656,6 +659,7 @@ do
   (
       cd "${outputdir}" &&
 	  download_and_extract_kernel_tree "$k" &&
+	  k="${k/^*}" &&
 	  cd "linux-$k/include/linux" &&
 	  if [ ! -e compiler-gcc6.h ]; then
 	      for f in compiler-gcc5.h compiler-gcc4.h; do
@@ -667,6 +671,7 @@ do
 	  fi
   ) ||
       continue
+  k="${k/^*}"
   if [ "${run_checkpatch}" = "true" ]; then
     run_checkpatch "$k"
   fi
diff --git a/scripts/specialize-patch b/scripts/specialize-patch
index eb28570a4..19a43ec22 100755
--- a/scripts/specialize-patch
+++ b/scripts/specialize-patch
@@ -72,18 +72,23 @@ function evaluate(stmnt, pattern, arg, op, result) {
        "(LINUX_VERSION_CODE < KERNEL_VERSION(4, 7, 0))", stmnt)
 
   gsub("defined\\(USE_PRE_440_WR_STRUCTURE\\)",
-       "(LINUX_VERSION_CODE < KERNEL_VERSION(4, 4, 0))", stmnt)
+       "(LINUX_VERSION_CODE < KERNEL_VERSION(4, 4, 0) \\&\\& " \
+       "RHEL_RELEASE_CODE -0 < 7 * 256 + 5)", stmnt)
 
   gsub("defined\\(IB_CREATE_CQ_HAS_INIT_ATTR\\)",
        "(LINUX_VERSION_CODE >= KERNEL_VERSION(4, 2, 0) || " \
-       "RHEL_RELEASE_CODE -0 >= 7 * 256 + 6)", stmnt)
+       "RHEL_RELEASE_CODE -0 >= 7 * 256 + 5)", stmnt)
+
+  gsub("defined\\(CREATE_SEND_MAD_HAS_AH_ARG\\)",
+       "(LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 16))", stmnt)
 
   gsub("defined\\(CREATE_SEND_MAD_HAS_BASE_ARG\\)",
        "(LINUX_VERSION_CODE >= KERNEL_VERSION(4, 2, 0) || " \
-       "RHEL_RELEASE_CODE -0 >= 7 * 256 + 6)", stmnt)
+       "RHEL_RELEASE_CODE -0 >= 7 * 256 + 5)", stmnt)
 
   gsub("defined\\(IB_CM_LISTEN_TAKES_FOURTH_ARG\\)",
-       "(LINUX_VERSION_CODE < KERNEL_VERSION(4, 3, 0))", stmnt)
+       "(LINUX_VERSION_CODE < KERNEL_VERSION(4, 3, 0) \\&\\& " \
+       "RHEL_RELEASE_CODE -0 < 7 * 256 + 5)", stmnt)
 
   gsub("defined\\(IB_CLIENT_REMOVE_TAKES_TWO_ARGS\\)",
        "(LINUX_VERSION_CODE >= KERNEL_VERSION(4, 3, 0) || " \
@@ -91,47 +96,46 @@ function evaluate(stmnt, pattern, arg, op, result) {
   
   gsub("defined\\(IB_QUERY_GID_HAS_ATTR_ARG\\)",
        "(LINUX_VERSION_CODE >= KERNEL_VERSION(4, 4, 0) || " \
-       "RHEL_RELEASE_CODE -0 >= 7 * 256 + 6)", stmnt)
+       "RHEL_RELEASE_CODE -0 >= 7 * 256 + 5)", stmnt)
 
   gsub("RDMA_CREATE_ID_TAKES_NET_ARG",
        "(LINUX_VERSION_CODE >= KERNEL_VERSION(4, 4, 0) || " \
-       "RHEL_RELEASE_CODE -0 >= 7 * 256 + 6)", stmnt)
+       "RHEL_RELEASE_CODE -0 >= 7 * 256 + 5)", stmnt)
 
   gsub("defined\\(HAVE_DEV_ATTR_MAX_RECV_SGE\\)",
-       "(LINUX_VERSION_CODE >= KERNEL_VERSION(4, 19, 0))", stmnt)
+       "(LINUX_VERSION_CODE >= KERNEL_VERSION(4, 19, 0) || " \
+       "RHEL_RELEASE_CODE -0 >= 7 * 256 + 7)", stmnt)
 
   gsub("HAVE_DEV_ATTR_MAX_SEND_SGE",
        "(LINUX_VERSION_CODE >= KERNEL_VERSION(4, 19, 0) || " \
-       "RHEL_RELEASE_CODE -0 >= 8 * 256 + 0)", stmnt)
-
-  gsub("defined\\(HAVE_DEV_ATTR_MAX_RECV_SGE\\)",
-       "(LINUX_VERSION_CODE >= KERNEL_VERSION(4, 19, 0) || " \
-       "RHEL_RELEASE_CODE -0 >= 8 * 256 + 0)", stmnt)
+       "RHEL_RELEASE_CODE -0 >= 7 * 256 + 7)", stmnt)
 
   gsub("HAVE_RDMA_DESTROY_AH_WITH_FLAGS",
-       "(LINUX_VERSION_CODE >= KERNEL_VERSION(4, 21, 0))", stmnt)
+       "(LINUX_VERSION_CODE >= KERNEL_VERSION(4, 21, 0) || " \
+       "RHEL_RELEASE_CODE -0 >= 8 * 256 + 1)", stmnt)
   
   gsub("HAVE_RDMA_DESTROY_AH",
-       "(LINUX_VERSION_CODE >= KERNEL_VERSION(4, 12, 0))", stmnt)
+       "(LINUX_VERSION_CODE >= KERNEL_VERSION(4, 12, 0) || " \
+       "RHEL_RELEASE_CODE -0 >= 7 * 256 + 5)", stmnt)
   
   gsub("HAVE_RDMA_QUERY_GID",
-       "(LINUX_VERSION_CODE >= KERNEL_VERSION(4, 19, 0))", stmnt)
+       "(LINUX_VERSION_CODE >= KERNEL_VERSION(4, 19, 0) || " \
+       "RHEL_RELEASE_CODE -0 >= 8 * 256 + 1)", stmnt)
 
   gsub("HAVE_SRP_DATA_DESC_IMM",
-       "(LINUX_VERSION_CODE >= KERNEL_VERSION(4, 21, 0))", stmnt)
+       "(LINUX_VERSION_CODE >= KERNEL_VERSION(4, 21, 0) || " \
+       "RHEL_RELEASE_CODE -0 >= 8 * 256 + 1)", stmnt)
 
   gsub("HAVE_STRUCT_SRP_LOGIN_REQ_RDMA",
        "(LINUX_VERSION_CODE >= KERNEL_VERSION(4, 16, 0))", stmnt)
 
-  gsub("defined\\(USE_PRE_440_WR_STRUCTURE\\)",
-       "(LINUX_VERSION_CODE < KERNEL_VERSION(4, 4, 0))", stmnt)
-
   gsub("defined\\(HAVE_IB_EVENT_GID_CHANGE\\)",
        "(LINUX_VERSION_CODE >= KERNEL_VERSION(3, 1, 0) || " \
        "RHEL_RELEASE_CODE -0 >= 6 * 256 + 10)", stmnt)
 
   gsub("defined\\(HAVE_IB_QUERY_DEVICE\\)",
-       "(LINUX_VERSION_CODE < KERNEL_VERSION(4, 5, 0))", stmnt)
+       "(LINUX_VERSION_CODE < KERNEL_VERSION(4, 5, 0) \\&\\& " \
+       "RHEL_RELEASE_CODE -0 < 7 * 256 + 5)", stmnt)
 
   gsub("defined\\(MAD_HANDLER_TAKES_SEND_BUF\\)",
        "(LINUX_VERSION_CODE >= KERNEL_VERSION(4, 5, 0) || " \
@@ -139,11 +143,11 @@ function evaluate(stmnt, pattern, arg, op, result) {
 
   gsub("defined\\(HAVE_IB_SET_CPI_RESP_TIME\\)",
        "(LINUX_VERSION_CODE >= KERNEL_VERSION(4, 7, 0) || " \
-       "RHEL_RELEASE_CODE -0 >= 7 * 256 + 6)", stmnt)
+       "RHEL_RELEASE_CODE -0 >= 7 * 256 + 5)", stmnt)
 
   gsub("defined\\(IB_PD_HAS_LOCAL_DMA_LKEY\\)",
        "(LINUX_VERSION_CODE >= KERNEL_VERSION(4, 9, 0) || " \
-       "RHEL_RELEASE_CODE -0 >= 7 * 256 + 6)", stmnt)
+       "RHEL_RELEASE_CODE -0 >= 7 * 256 + 5)", stmnt)
 
   gsub("defined\\(HAVE_IB_DMA_MAP_OPS\\)",
        "(LINUX_VERSION_CODE >= KERNEL_VERSION(0, 0, 0))", stmnt)
@@ -267,6 +271,12 @@ function evaluate(stmnt, pattern, arg, op, result) {
       sub(pattern, op[1] == 0, stmnt)
     }
     
+    pattern = "\\([[:blank:]]*(-*[0-9]+)[[:blank:]]*\\)"
+    while (match(stmnt, pattern, op) != 0)
+    {
+      sub(pattern, op[1], stmnt)
+    }
+    
     pattern="(-*[0-9]+)[[:blank:]]*(\\*|/)[[:blank:]]*(-*[0-9]+)"
     while (match(stmnt, pattern, op) != 0)
     {
@@ -385,6 +395,7 @@ function handle_if(evaluated)
   if ($0 ~ "LINUX_VERSION_CODE"						\
       || $0 ~ "CONFIG_SCST_PROC"					\
       || $0 ~ "CONFIG_SCST_STRICT_SERIALIZING"				\
+      || $0 ~ "CREATE_SEND_MAD_HAS_AH_ARG"				\
       || $0 ~ "CREATE_SEND_MAD_HAS_BASE_ARG"				\
       || $0 ~ "ENABLE_NPIV"						\
       || $0 ~ "FC_VPORT_CREATE_DEFINED"					\
@@ -595,10 +606,12 @@ function dump_lines() {
     if (h[0] != "")
       printf "@@ -%d,%d +%d,%d @@%s\n",h[1],h[2]-lines_less_deleted,h[3],h[4]-lines_less_added,h[5]
     for (i = 0; i < lines; i++) {
-      gsub("BAD_WR_MODIFIER",
-           LINUX_VERSION_CODE < version_code("4.19.0") ? "" : "const", line[i])
-      gsub("CM_HANDLER_EVENT_MODIFIER",
-           LINUX_VERSION_CODE < version_code("4.19.0") ? "" : "const", line[i])
+      modifier = (LINUX_VERSION_CODE < version_code("4.19.0") &&
+                  (RHEL_MAJOR == "" ||
+                   RHEL_MAJOR * 256 + RHEL_MINOR < 7 * 256 + 8) ?
+                  "" : "const");
+      gsub("BAD_WR_MODIFIER", modifier, line[i])
+      gsub("CM_HANDLER_EVENT_MODIFIER", modifier, line[i])
       print line[i]
     }
   }
diff --git a/scst/include/scst.h b/scst/include/scst.h
index d85f47d4c..9dafd7bd8 100644
--- a/scst/include/scst.h
+++ b/scst/include/scst.h
@@ -4885,7 +4885,9 @@ static inline struct scatterlist *sg_next_inline(struct scatterlist *sg)
 static inline void sg_clear(struct scatterlist *sg)
 {
 	memset(sg, 0, sizeof(*sg));
-#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 18, 0) && defined(CONFIG_DEBUG_SG)
+#if defined(CONFIG_DEBUG_SG) &&					\
+	LINUX_VERSION_CODE < KERNEL_VERSION(4, 18, 0) &&	\
+	(!defined(RHEL_MAJOR) && RHEL_MAJOR -0 < 8)
 	sg->sg_magic = SG_MAGIC;
 #endif
 }
diff --git a/scst/src/scst_lib.c b/scst/src/scst_lib.c
index 9675cea8c..d9378c4a4 100644
--- a/scst/src/scst_lib.c
+++ b/scst/src/scst_lib.c
@@ -8561,7 +8561,8 @@ static void scsi_end_async(struct request *req, blk_status_t error)
 
 #if LINUX_VERSION_CODE < KERNEL_VERSION(3, 17, 0)
 	lockdep_assert_held(req->q->queue_lock);
-#elif LINUX_VERSION_CODE < KERNEL_VERSION(4, 21, 0)
+#elif LINUX_VERSION_CODE < KERNEL_VERSION(4, 21, 0) &&	\
+	(!defined(RHEL_MAJOR) || RHEL_MAJOR -0 < 8)
 	if (!req->q->mq_ops)
 		lockdep_assert_held(req->q->queue_lock);
 #endif
diff --git a/scstadmin/init.d/scst b/scstadmin/init.d/scst
index e2703409c..7c7972e24 100755
--- a/scstadmin/init.d/scst
+++ b/scstadmin/init.d/scst
@@ -102,8 +102,8 @@ start_daemon() {
     "$@" >/dev/null 2>&1 &
 }
 killproc() {
-    local exe="`basename "$1"`"
-    killall $exe
+    exe=$(basename "$1")
+    killall "$exe"
     rm -f "/var/run/$exe.pid"
 }
 fi
@@ -111,7 +111,7 @@ fi
 # Whether or not there is a "TARGET_DRIVER iscsi" section in scst.conf.
 using_iscsi() {
     for m in $SCST_MODULES; do
-        if [ $m = "iscsi_scst" ]; then
+        if [ "$m" = "iscsi_scst" ]; then
             return 0
         fi
     done
@@ -127,12 +127,12 @@ parse_scst_conf() {
     if [ ! -e $SCST_CFG ]; then
         return 0
     fi
-    local nonblanks="[^[:blank:]]\{1,\}"
-    local blanks="[[:blank:]]\{1,\}"
-    local optblanks="[[:blank:]]*"
-    SCST_MODULES="$SCST_MODULES `sed -n -e 's/^HANDLER'"$blanks"'\('"$nonblanks"'\)'"$blanks"'{'"$optblanks"'$/\1/p' \
-                         -e 's/^\[HANDLER'"$blanks"'\('"$nonblanks"'\)\]$/\1/p' $SCST_CFG \
-        | while read h; do
+    nonblanks="[^[:blank:]]\{1,\}"
+    blanks="[[:blank:]]\{1,\}"
+    optblanks="[[:blank:]]*"
+    SCST_MODULES="$SCST_MODULES $(sed -n -e "s/^HANDLER$blanks\($nonblanks\)$blanks{$optblanks\$/\1/p" \
+                    -e "s/^\[HANDLER$blanks\($nonblanks\)\]\$/\1/p" $SCST_CFG \
+        | while read -r h; do
             case "$h" in
                 dev_cdrom)      echo scst_cdrom;;
                 dev_changer)    echo scst_changer;;
@@ -145,18 +145,18 @@ parse_scst_conf() {
                 vdisk*|vcdrom)  echo scst_vdisk;;
                 *)              echo "$h";;
             esac
-        done | sort -u` \
-        `sed -n 's/^TARGET_DRIVER'"$blanks"'\('"$nonblanks"'\)'"$blanks"'{'"$optblanks"'$/\1/p' $SCST_CFG | while read d; do
+        done | sort -u) \
+        $(sed -n "s/^TARGET_DRIVER$blanks\($nonblanks\)$blanks{$optblanks\$/\1/p" $SCST_CFG | while read -r d; do
             case "$d" in
                 iscsi)    echo iscsi_scst;;
                 qla2x00t) echo qla2x00tgt;;
                 copy_manager) ;;
                 *)        echo "$d";;
             esac
-        done | sort -u` \
+        done | sort -u) \
         $SCST_TARGET_MODULES"
     if using_iscsi; then
-        case "`uname -m`" in
+        case "$(uname -m)" in
             x86_64|i686)
                 SCST_OPT_MODULES="crc32c-intel $SCST_OPT_MODULES";;
         esac
@@ -168,8 +168,6 @@ parse_scst_conf() {
 # Keep trying to unload kernel module $1 for up to $2 seconds. Return true
 # if and only if the kernel module was unloaded before the timeout expired.
 unload_kmod() {
-    local i m t
-
     m="$1"
     t="$2"
     i=0
@@ -185,7 +183,7 @@ unload_kmod() {
 # Unload SCST. parse_scst_conf must already have been invoked.
 unload_scst() {
     for d in $SCST_DAEMONS; do
-        killproc $d
+        killproc "$d"
     done
 
     # isert_scst must be unloaded before iscsi_scst. Note that unloading
@@ -199,14 +197,14 @@ unload_scst() {
         reverse_list="$m $reverse_list"
     done
     for m in $reverse_list; do
-        refcnt="`cat /sys/module/$m/refcnt 2>/dev/null`"
-        if [ ! -z "$refcnt" ] && [ "$refcnt" -gt 0 ]; then
+        refcnt=$(cat "/sys/module/$m/refcnt" 2>/dev/null)
+        if [ -n "$refcnt" ] && [ "$refcnt" -gt 0 ]; then
             # Apparently it can happen that the iscsi_scst refcnt is only
             # decremented a short time after killproc finished. If that
             # occurs, sleep for a short time.
             sleep 1
         fi
-        unload_kmod $m 30 || return 1
+        unload_kmod "$m" 30 || return 1
     done
     # Loading qla2x00tgt causes qla2xxx_scst to be loaded but removing
     # qla2x00tgt does not cause qla2xxx_scst to be unloaded. Hence unload it
@@ -216,7 +214,7 @@ unload_scst() {
         reverse_list="$m $reverse_list"
     done
     for m in $reverse_list; do
-        rmmod $m >/dev/null 2>&1
+        rmmod "$m" >/dev/null 2>&1
     done
 
     # Clear the config in case unloading failed or SCST has been built into the
@@ -229,7 +227,7 @@ unload_scst() {
 }
 
 start_scst() {
-        if [ -e /sys/module/scst -a -e /sys/module/scst/refcnt ]; then
+        if [ -e /sys/module/scst ] && [ -e /sys/module/scst/refcnt ]; then
             echo Already started
             return 0
         fi
@@ -237,13 +235,13 @@ start_scst() {
         parse_scst_conf
 
         for m in $SCST_OPT_MODULES; do
-            modprobe $m >/dev/null 2>&1
+            modprobe "$m" >/dev/null 2>&1
         done
 
         for m in $SCST_MODULES; do
-            if [ ! -e /sys/module/$m ]; then
-                if ! modprobe $m; then
-                    echo modprobe $m failed.
+            if [ ! -e "/sys/module/$m" ]; then
+                if ! modprobe "$m"; then
+                    echo "modprobe $m failed."
                     unload_scst
                     return 5
                 fi
@@ -253,9 +251,9 @@ start_scst() {
         for d in $SCST_DAEMONS; do
             options=""
             if [ "$(basename "$d")" = "iscsi-scstd" ]; then
-                options="${ISCSID_OPTIONS}"
+                options=${ISCSID_OPTIONS}
             fi
-            if ! start_daemon $d $options; then
+            if ! start_daemon "$d" $options; then
                 echo "Starting $d failed"
                 unload_scst
                 return 1
@@ -298,16 +296,15 @@ scst_status() {
         parse_scst_conf
 
         for m in $SCST_MODULES; do
-            if [ ! -e /sys/module/$m ]; then
+            if [ ! -e "/sys/module/$m" ]; then
                 echo "$m: not loaded"
                 return 3
             fi
         done
 
         for d in $SCST_DAEMONS; do
-            daemon_name=`basename ${d}`
-            pgrep ${daemon_name} > /dev/null 2>&1
-            if [ $? -ne 0 ]; then
+            daemon_name=$(basename "${d}")
+            if ! pgrep "${daemon_name}" > /dev/null 2>&1; then
                 echo "${daemon_name}: not running"
                 return 3
             fi