diff --git a/os-prober-btrfsfix.patch b/os-prober-btrfsfix.patch
deleted file mode 100644
index 1047d24..0000000
--- a/os-prober-btrfsfix.patch
+++ /dev/null
@@ -1,472 +0,0 @@
-diff --git a/common.sh b/common.sh
-index c2c5f46..8fb3c5f 100644
---- a/common.sh
-+++ b/common.sh
-@@ -155,6 +155,7 @@ parse_proc_mounts () {
- 	done
- }
- 
-+# add forth parameter to pickup btrfs subvol info
- parsefstab () {
- 	while read -r line; do
- 		case "$line" in
-@@ -165,12 +166,22 @@ parsefstab () {
- 				set -f
- 				set -- $line
- 				set +f
--				printf '%s %s %s\n' "$1" "$2" "$3"
-+				printf '%s %s %s %s\n' "$1" "$2" "$3" "$4"
- 			;;
- 		esac
- 	done
- }
- 
-+#check_btrfs_mounted $bootsv $bootuuid)
-+check_btrfs_mounted () {
-+	bootsv="$1"
-+	bootuuid="$2"
-+	bootdev=$(blkid | grep "$bootuuid" | cut -d ':' -f  1)
-+	bindfrom=$(grep " btrfs " /proc/self/mountinfo |
-+		   grep " $bootdev " | grep " /$bootsv " | cut -d ' ' -f 5)
-+	printf "%s" "$bindfrom"
-+}
-+
- unescape_mount () {
- 	printf %s "$1" | \
- 		sed 's/\\011/	/g; s/\\012/\n/g; s/\\040/ /g; s/\\134/\\/g'
-diff --git a/linux-boot-prober b/linux-boot-prober
-index e32dc84..2a60fa2 100755
---- a/linux-boot-prober
-+++ b/linux-boot-prober
-@@ -5,16 +5,143 @@ set -e
- 
- newns "$@"
- require_tmpdir
-+ERR="n"
-+
-+tmpmnt=/var/lib/os-prober/mount
-+if [ ! -d "$tmpmnt" ]; then
-+	mkdir "$tmpmnt"
-+fi
-+
-+mounted=
-+bootmnt=
-+bootsv=
-+bootuuid=
- 
- grep "^/dev/" /proc/mounts | parse_proc_mounts >"$OS_PROBER_TMP/mounted-map" || true
- 
--partition="$1"
-+if [ -z "$1" ]; then
-+	ERR=y
-+elif [ "$1" = btrfs -a -z "$2" ]; then
-+	ERR=y
-+elif [ "$1" = btrfs -a -z "$3" ]; then
-+	ERR=y
-+elif [ "$1" = btrfs ]; then
-+	type=btrfs
-+	echo "$2" | grep -q "^UUID=" || ERR=y
-+	echo "$3" | grep -q "^subvol=" || ERR=y
-+	export "$2"
-+	export "$3"
-+	partition=$(blkid | grep "$UUID" | cut -d ':' -f 1 | tr '\n' ' ' | cut -d ' ' -f 1)
-+	debug "btrfs: partition=$partition, UUID=$UUID, subvol=$subvol"
-+else
-+	partition="$1"
-+	type=other
-+fi
- 
--if [ -z "$partition" ]; then
-+if [ "x$ERR" != xn ]; then
- 	echo "usage: linux-boot-prober partition" >&2
-+	echo "       linux-boot-prober btrfs UUID=<> subvol=<>" >&2
- 	exit 1
- fi
- 
-+if [ "$type" = btrfs ]; then
-+	# handle all of the btrfs stuff here
-+	if [ ! -e "/proc/self/mountinfo" ]; then
-+		warn "/proc/self/mountinfo does not exist, exiting"
-+		umount "$tmpmnt" 2>/dev/null
-+		rmdir "$tmpmnt" 2>/dev/null
-+		exit 1
-+	fi
-+	mpoint=$(grep "btrfs" /proc/self/mountinfo | grep " /$subvol " | grep " $partition " | cut -d ' ' -f 5)
-+	if [ "$mpoint" = "/" ]; then
-+		warn "specifying active root not valid, exiting"
-+		umount "$tmpmnt" 2>/dev/null
-+		rmdir "$tmpmnt" 2>/dev/null
-+		exit 1
-+	fi
-+	if [ "$mpoint" = "$tmpmnt" ]; then
-+		warn "btrfs subvol=$subvool, UUID=$UUID, already mounted on $tmpmnt **ERROR**"
-+		umount "$tmpmnt" 2>/dev/null
-+		rmdir "$tmpmnt" 2>/dev/null
-+		exit 1
-+	fi
-+	if [ -z "$mpoint" ]; then
-+		# mount the btrfs root
-+		if ! mount -o subvol=$subvol -t btrfs -U $UUID "$tmpmnt" 2>/dev/null; then
-+			warn "error mounting btrfs subvol=$subvol UUID=$UUID"
-+			umount "$tmpmnt/boot" 2>/dev/null
-+			umount "$tmpmnt" 2>/dev/null
-+			rmdir "$tmpmnt" 2>/dev/null
-+			exit 1
-+		fi
-+	else
-+		# bind-mount
-+		if ! mount -o bind "$mpoint" "$tmpmnt" 2>/dev/null; then
-+			warn "error mounting btrfs bindfrom=$mpoint subvol=$subvol UUID=$UUID"
-+			umount "$tmpmnt/boot" 2>/dev/null
-+			umount "$tmpmnt" 2>/dev/null
-+			rmdir "$tmpmnt" 2>/dev/null
-+			exit 1
-+		fi
-+	fi
-+	debug "mounted btrfs $partition, subvol=$subvol on $tmpmnt"
-+	if [ ! -e "$tmpmnt/etc/fstab" ]; then
-+		warn "btrfs subvol=$subvol not root"
-+		umount "$tmpmnt" 2>/dev/null
-+		rmdir "$tmpmnt" 2>/dev/null
-+		exit 1
-+	fi
-+	bootmnt=$(parsefstab < "$tmpmnt/etc/fstab" | grep " /boot ") || true
-+	if [ -z "$bootmnt" ]; then
-+		# /boot is part of the root
-+		bootpart="$partition"
-+		bootsv="$subvol"
-+	elif echo "$bootmnt" | cut -d ' ' -f 3 | grep -q "btrfs"; then
-+		# separate btrfs /boot subvolume
-+		bootsv=$(echo "$bootmnt" | cut -d ' ' -f 4 | grep "^subvol=" | sed "s/subvol=//" )
-+		bootuuid=$(echo "$bootmnt" | cut -d ' ' -f 1 | grep "^UUID=" | sed "s/UUID=//" )
-+		debug "mounting btrfs $tmpmnt/boot UUID=$bootuuid subvol=$bootsv"
-+		bindfrom=$(check_btrfs_mounted $bootsv $bootuuid)
-+		if [ -n "$bindfrom" ]; then
-+			# already mounted some place
-+			if ! mount -o bind $bindfrom "$tmpmnt/boot" 2>/dev/null; then
-+				warn "error bind mounting btrfs boot subvol=$bootsv, from=$bindfrom"
-+				umount "$tmpmnt/boot" 2>/dev/null
-+				umount "$tmpmnt" 2>/dev/null
-+				rmdir "$tmpmnt" 2>/dev/null
-+				exit 1
-+			fi
-+		elif ! mount -o subvol=$bootsv -t btrfs -U $bootuuid "$tmpmnt/boot" 2>/dev/null; then
-+			warn "error mounting btrfs boot partition subvol=$bootsv, UUID=$bootuuid"
-+			umount "$tmpmnt/boot" 2>/dev/null
-+			umount "$tmpmnt" 2>/dev/null
-+			rmdir "$tmpmnt" 2>/dev/null
-+			exit 1
-+		fi
-+		bootpart=$(grep " btrfs " /proc/self/mountinfo | grep " /$bootsv " | cut -d ' ' -f 10)
-+	else
-+		# non-btrfs partition or logical volume
-+		linux_mount_boot $partition $tmpmnt
-+		bootpart="${mountboot%% *}"
-+		bootsv=
-+	fi
-+
-+	test="/usr/lib/linux-boot-probes/mounted/40grub2"
-+	if [ -f $test ] && [ -x $test ]; then
-+		debug "running $test $partition $bootpart $tmpmnt $type $subvol $bootsv"
-+		if $test "$partition" "$bootpart" "$tmpmnt" "$type" "$subvol" "$bootsv"; then
-+			debug "$test succeeded"
-+		fi
-+	fi
-+	umount "$tmpmnt/boot" 2>/dev/null || true
-+	if ! umount "$tmpmnt" 2>/dev/null; then
-+		warn "problem umount $tmpmnt"
-+	fi
-+	rmdir "$tmpmnt" 2>/dev/null || true
-+
-+	exit 0
-+fi
-+
- if ! mapped="$(mapdevfs "$partition")"; then
- 	log "Device '$partition' does not exist; skipping"
- 	continue
-@@ -22,8 +149,8 @@ fi
- 
- if ! grep -q "^$mapped " "$OS_PROBER_TMP/mounted-map"; then
- 	for test in /usr/lib/linux-boot-probes/*; do
--		debug "running $test"
- 		if [ -x $test ] && [ -f $test ]; then
-+			debug "running $test"
- 			if $test "$partition"; then
- 				debug "linux detected by $test"
- 				break
-diff --git a/linux-boot-probes/mounted/common/40grub2 b/linux-boot-probes/mounted/common/40grub2
-index 885614e..db5cbfd 100755
---- a/linux-boot-probes/mounted/common/40grub2
-+++ b/linux-boot-probes/mounted/common/40grub2
-@@ -2,17 +2,30 @@
- . /usr/share/os-prober/common.sh
- set -e
- 
-+# add support for btrfs with no separate /boot
-+# that is, rootsv = bootsv
- partition="$1"
- bootpart="$2"
- mpoint="$3"
- type="$4"
-+rootsv="$5"
-+bootsv="$6"
- 
- found_item=0
- 
- entry_result () {
-+	if [ "x$type" = "xbtrfs" -a "$partition" = "$bootpart" ]; then
-+		# trim off the leading subvol
-+		kernelfile=$(echo "$kernel" | cut -d '/' -f 2- | cut -d '/' -f 2-)
-+		if [ "x$rootsv" != "x$bootsv" ]; then
-+		   kernelfile="/boot/$kernelfile"
-+		fi
-+	else
-+		kernelfile=$kernel
-+	fi
- 	if [ "$ignore_item" = 0 ] && \
- 	   [ -n "$kernel" ] && \
--	   [ -e "$mpoint/$kernel" ]; then
-+	   [ -e "$mpoint/$kernelfile" ]; then
- 		result "$rootpart:$bootpart:$title:$kernel:$initrd:$parameters"
- 		found_item=1
- 	fi
-diff --git a/os-prober b/os-prober
-index 8852887..482c3c2 100755
---- a/os-prober
-+++ b/os-prober
-@@ -76,9 +76,12 @@ partitions () {
- 
- 	# Also detect OSes on LVM volumes (assumes LVM is active)
- 	if type lvs >/dev/null 2>&1; then
--		echo "$(LVM_SUPPRESS_FD_WARNINGS=1 log_output lvs --noheadings --separator : -o vg_name,lv_name |
-+		echo "$(LVM_SUPPRESS_FD_WARNINGS=1 log_output lvs --noheadings --separator : -o vg_name,lv_name 2>/dev/null |
- 			sed "s|-|--|g;s|^[[:space:]]*\(.*\):\(.*\)$|/dev/mapper/\1-\2|")"
- 	fi
-+
-+	# now lets make sure we got all of the btrfs partitions and disks
-+	blkid | grep 'TYPE="btrfs"' | cut -d ':' -f 1
- }
- 
- parse_proc_swaps () {
-@@ -136,6 +139,8 @@ if [ -f /proc/mdstat ] ; then
- 	grep "^md" /proc/mdstat | cut -d: -f2- | parse_proc_mdstat >"$OS_PROBER_TMP/raided-map" || true
- fi
- 
-+: >"$OS_PROBER_TMP/btrfs-vols"
-+
- for partition in $(partitions); do
- 	if ! mapped="$(mapdevfs "$partition")"; then
- 		log "Device '$partition' does not exist; skipping"
-@@ -154,7 +159,26 @@ for partition in $(partitions); do
- 		continue
- 	fi
- 
--	if ! grep -q "^$mapped " "$OS_PROBER_TMP/mounted-map" ; then
-+	# do btrfs processing here; both mounted and unmounted will
-+	# be handled by 50mounted-tests so we can do a subvol only once.
-+	type=$(blkid -o value -s TYPE $mapped || true)
-+	if [ "$type" = btrfs ]; then
-+		uuid=$(blkid -o value -s UUID $mapped)
-+		if grep -q "^$uuid" "$OS_PROBER_TMP/btrfs-vols" ; then
-+			continue
-+		fi
-+		debug "btrfs volume uuid=$uuid partition=$partition"
-+		echo "$uuid" >>"$OS_PROBER_TMP/btrfs-vols"
-+		test="/usr/lib/os-probes/50mounted-tests"
-+		if [ -f "$test" ] && [ -x "$test" ]; then
-+			debug "running $test on btrfs $partition"
-+			if "$test" btrfs "$uuid" "$partition"; then
-+				debug "os detected by $test"
-+				continue
-+			fi
-+		fi
-+
-+	elif ! grep -q "^$mapped " "$OS_PROBER_TMP/mounted-map" ; then
- 		for test in /usr/lib/os-probes/*; do
- 			if [ -f "$test" ] && [ -x "$test" ]; then
- 				debug "running $test on $partition"
-diff --git a/os-probes/common/50mounted-tests b/os-probes/common/50mounted-tests
-index 2951ef9..e33eb82 100755
---- a/os-probes/common/50mounted-tests
-+++ b/os-probes/common/50mounted-tests
-@@ -19,19 +19,31 @@ do_unmount() {
- 	rmdir "$tmpmnt" || true
- }
- 
--types="$(fs_type "$partition")"
-+if [ "x$1" = xbtrfs ]; then
-+	types=btrfs
-+	if [ -z "$2" -o -z "$3" ]; then
-+		debug "missing btrfs parameters, exiting"
-+		exit 1
-+	fi
-+	UUID="$2"
-+	BTRFSDEV="$3"
-+else
-+	partition="$1"
-+	types="$(fs_type "$partition")" || types=NOT-DETECTED
-+fi
-+
- if [ "$types" = NOT-DETECTED ]; then
- 	debug "$1 type not recognised; skipping"
--	exit 0
-+	exit 1
- elif [ "$types" = swap ]; then
- 	debug "$1 is a swap partition; skipping"
--	exit 0
-+	exit 1
- elif [ "$types" = crypto_LUKS ]; then
- 	debug "$1 is a LUKS partition; skipping"
--	exit 0
-+	exit 1
- elif [ "$types" = LVM2_member ]; then
- 	debug "$1 is an LVM member; skipping"
--	exit 0
-+	exit 1
- elif [ "$types" = ntfs ]; then
- 	if type ntfs-3g >/dev/null 2>&1; then
- 		types='ntfs-3g ntfs'
-@@ -40,7 +52,7 @@ elif [ -z "$types" ]; then
- 	if type cryptsetup >/dev/null 2>&1 && \
- 	   cryptsetup luksDump "$partition" >/dev/null 2>&1; then
- 		debug "$1 is a LUKS partition; skipping"
--		exit 0
-+		exit 1
- 	fi
- 	for type in $(grep -v nodev /proc/filesystems); do
- 		# hfsplus filesystems are mountable as hfs. Try hfs last so
-@@ -63,6 +75,108 @@ if [ ! -d "$tmpmnt" ]; then
- fi
- 
- mounted=
-+
-+# all btrfs processing here.  Handle both unmounted and
-+# mounted subvolumes.
-+if [ "$types" = btrfs ]; then
-+	partition="$BTRFSDEV"
-+	debug "begin btrfs processing for $UUID"
-+	# note that the btrfs volume must not be mounted ro
-+	if mount -t btrfs -U "$UUID" "$tmpmnt"  2>/dev/null; then
-+		debug "btrfs volume $UUID mounted"
-+	else
-+		warn "cannot mount btrfs volume $UUID, exiting"
-+		rmdir "$tmpmnt" || true
-+		exit 1
-+	fi
-+	# besides regular subvols, get ro and snapshot so thet can be excluded
-+        subvols=$(btrfs subvolume list "$tmpmnt" | cut -d ' ' -f 9)
-+        rosubvols=$(btrfs subvolume list -r "$tmpmnt" | cut -d ' ' -f 9)
-+        sssubvols=$(btrfs subvolume list -s "$tmpmnt" | cut -d ' ' -f 14)
-+        if ! umount "$tmpmnt"; then
-+            warn "failed to umount btrfs volume on $tmpmnt"
-+            rmdir "$tmpmnt" || true
-+            exit 1
-+        fi
-+
-+	found=
-+	mounted=
-+
-+	mpoint="$(grep btrfs /proc/self/mountinfo | grep "$partition " | cut -d ' ' -f 5)"
-+	if [ -n "$mpoint" -a "x$mpoint" = "x/" ]; then
-+		debug "This is the root for the running system" #running system must be done elsewhere
-+	else
-+	    #partition was not root of running system, so lets look for bootable subvols
-+	    if [ -n "$mpoint" ] ; then
-+		mounted=1  #partition was already mounted,so lets not unmount it when done
-+	    else
-+		# again, do not mount btrfs ro
-+		mount -t btrfs -U "$UUID" "$tmpmnt"
-+		mpoint="$tmpmnt"
-+	    fi
-+
-+	    test="/usr/lib/os-probes/mounted/90linux-distro"
-+	    if [ -f "$test" ] && [ -x "$test" ]; then
-+		debug "running subtest $test"
-+		if "$test" "$partition" "$mpoint" btrfs "UUID=$UUID"; then
-+		    debug "os found by subtest $test on $partition"
-+		    found=1
-+		fi
-+	    fi
-+	    if [ -z "$mounted" ]; then
-+		if ! umount "$tmpmnt"; then
-+		    warn "failed to umount $tmpmnt"
-+		fi
-+	    fi
-+	fi
-+
-+	if [ -z "$subvols" ]; then
-+	        debug "no subvols found on btrfs volume $UUID"
-+	else
-+		found=
-+                for subvol in $subvols; do
-+			debug "begin btrfs processing for $UUID subvol=$subvol"
-+			if echo "$rosubvols" | grep -q -x "$subvol"; then
-+				continue
-+			fi
-+			if echo "$sssubvols" | grep -q -x "$subvol"; then
-+				continue
-+			fi
-+			mounted=
-+			mpoint="$(grep btrfs /proc/self/mountinfo | grep "$partition " | grep "/$subvol " | cut -d ' ' -f 5)"
-+			if [ -n "$mpoint" ]; then
-+				if [ "x$mpoint" = "x/" ]; then
-+					continue # this is the root for the running system
-+				fi
-+				mounted=1
-+			else
-+				# again, do not mount btrfs ro
-+				mount -t btrfs -o subvol="$subvol" -U "$UUID" "$tmpmnt"
-+				mpoint="$tmpmnt"
-+			fi
-+			test="/usr/lib/os-probes/mounted/90linux-distro"
-+			if [ -f "$test" ] && [ -x "$test" ]; then
-+				debug "running subtest $test"
-+				if "$test" "$partition" "$mpoint" btrfs "UUID=$UUID" "subvol=$subvol"; then
-+					debug "os found by subtest $test on subvol $subvol"
-+					found=1
-+				fi
-+			fi
-+			if [ -z "$mounted" ]; then
-+				if ! umount "$tmpmnt"; then
-+				    warn "failed to umount $tmpmnt"
-+				fi
-+			fi
-+		done
-+	fi
-+	rmdir "$tmpmnt" || true
-+	if [ "$found" ]; then
-+		exit 0
-+	else
-+		exit 1
-+	fi
-+fi
-+
- if type grub-mount >/dev/null 2>&1 && \
-    type grub-probe >/dev/null 2>&1 && \
-    grub-mount "$partition" "$tmpmnt" 2>/dev/null; then
-diff --git a/os-probes/mounted/common/90linux-distro b/os-probes/mounted/common/90linux-distro
-index badfbb1..9bc5154 100755
---- a/os-probes/mounted/common/90linux-distro
-+++ b/os-probes/mounted/common/90linux-distro
-@@ -7,6 +7,8 @@ set -e
- partition="$1"
- dir="$2"
- type="$3"
-+uuid="$4"
-+subvol="$5"
- 
- # This test is inaccurate, but given separate / and /boot partitions and the
- # fact that only some architectures have ld-linux.so, I can't see anything
-@@ -143,7 +145,11 @@ if (ls "$dir"/lib*/ld*.so* && [ -d "$dir/boot" ] || ls "$dir"/usr/lib*/ld*.so*)
- 	fi
- 	
-         label="$(count_next_label "$short")"
--	result "$partition:$long:$label:linux"
-+	if [ "x$type" = "xbtrfs" -a "x$uuid" != "x" -a "x$subvol" != "x" ]; then
-+		result "$partition:$long:$label:linux:$type:$uuid:$subvol"
-+	else
-+		result "$partition:$long:$label:linux"
-+	fi
- 	exit 0
- else
- 	exit 1
diff --git a/os-prober-factor-out-logger.patch b/os-prober-factor-out-logger.patch
deleted file mode 100644
index 52cb7ce..0000000
--- a/os-prober-factor-out-logger.patch
+++ /dev/null
@@ -1,107 +0,0 @@
-Index: os-prober/common.sh
-===================================================================
---- os-prober.orig/common.sh
-+++ os-prober/common.sh
-@@ -62,10 +62,14 @@ cache_progname() {
-   esac
- }
- 
--log() {
--  cache_progname
--  logger -t "$progname" "$@"
--}
-+# fd_logger: bind value now, possibly after assigning default. 
-+eval '
-+  log() {
-+    cache_progname
-+    echo "$progname: $@"  1>&'${fd_logger:=9}'
-+  }
-+'
-+export fd_logger  # so subshells inherit current value by default
- 
- error() {
-   log "error: $@"
-@@ -81,10 +85,14 @@ debug() {
-   fi
- }
- 
--result () {
--  log "result:" "$@"
--  echo "$@"
--}
-+# fd_result: bind value now, possibly after assigning default.
-+eval '
-+  result() {
-+    log "result:" "$@"
-+    echo "$@"  1>&'${fd_result:=1}'
-+  }
-+'
-+export fd_result  # so subshells inherit current value by default
- 
- # shim to make it easier to use os-prober outside d-i
- if ! type mapdevfs >/dev/null 2>&1; then
-Index: os-prober/linux-boot-prober
-===================================================================
---- os-prober.orig/linux-boot-prober
-+++ os-prober/linux-boot-prober
-@@ -1,4 +1,12 @@
- #!/bin/sh
-+
-+# dash shell does not have "{varname}>&1" feature that bash shell has
-+# for auto-assignment of new filedescriptors.
-+# It is cumbersome to write the 'eval' to use our own variables in redirections.
-+# Therefore use fixed numbers.
-+export fd_result=3  # file descriptor for external results
-+export fd_logger=9  # file descriptor for input to logger
-+
- . /usr/share/os-prober/common.sh
- 
- set -e
-@@ -19,6 +27,7 @@ bootuuid=
- 
- grep "^/dev/" /proc/mounts | parse_proc_mounts >"$OS_PROBER_TMP/mounted-map" || true
- 
-+( (
- if [ -z "$1" ]; then
- 	ERR=y
- elif [ "$1" = btrfs -a -z "$2" ]; then
-@@ -186,3 +195,5 @@ else
- 		fi
- 	fi
- fi
-+) 9>&1 | logger 1>&-  # fd_logger
-+) 3>&1  # fd_result
-Index: os-prober/os-prober
-===================================================================
---- os-prober.orig/os-prober
-+++ os-prober/os-prober
-@@ -1,7 +1,14 @@
- #!/bin/sh
- set -e
- 
--. /usr/share/os-prober/common.sh
-+# dash shell does not have "{varname}>&1" feature that bash shell has
-+# for auto-assignment of new filedescriptors.
-+# It is cumbersome to write the 'eval' to use our own variables in redirections.
-+# Therefore use fixed numbers.
-+export fd_result=3  # file descriptor for external results
-+export fd_logger=9  # file descriptor for input to logger
-+
-+ . /usr/share/os-prober/common.sh
- 
- newns "$@"
- require_tmpdir
-@@ -136,6 +143,7 @@ fi
- 
- : >"$OS_PROBER_TMP/btrfs-vols"
- 
-+( (
- for partition in $(partitions); do
- 	if ! mapped="$(mapdevfs "$partition")"; then
- 		log "Device '$partition' does not exist; skipping"
-@@ -200,3 +208,5 @@ for partition in $(partitions); do
- 		fi
- 	fi
- done
-+) 9>&1 | logger 1>&-  # fd_logger
-+) 3>&1  # fd_result
diff --git a/os-prober-factored-logger-efi-fix.patch b/os-prober-factored-logger-efi-fix.patch
deleted file mode 100644
index 5c66fa0..0000000
--- a/os-prober-factored-logger-efi-fix.patch
+++ /dev/null
@@ -1,16 +0,0 @@
-Index: os-prober/os-probes/mounted/x86/05efi
-===================================================================
---- os-prober.orig/os-probes/mounted/x86/05efi
-+++ os-prober/os-probes/mounted/x86/05efi
-@@ -59,7 +59,11 @@ ret=1
- for test in /usr/lib/os-probes/mounted/efi/*; do
- 	debug "running subtest $test"
- 	if [ -f "$test" ] && [ -x "$test" ]; then
-+		# we need results of subtest in stdout
-+		orig_fd_res=$fd_result
-+		export fd_result=1
- 		entry=$("$test" "$mpoint/$efi")
-+		export fd_result=$orig_fd_res
- 		if [ -n "$entry" ]; then
- 			debug "bootloader $entry found by subtest $test"
- 			ret=0
diff --git a/os-prober-no-dummy-mach-kernel.patch b/os-prober-no-dummy-mach-kernel.patch
deleted file mode 100644
index b9e1254..0000000
--- a/os-prober-no-dummy-mach-kernel.patch
+++ /dev/null
@@ -1,22 +0,0 @@
-From f71f7eb5c492720c24033901ef8c6c420e188ff2 Mon Sep 17 00:00:00 2001
-From: Peter Jones <pjones@redhat.com>
-Date: Thu, 10 May 2012 14:47:35 -0400
-Subject: [PATCH] Don't count our dummy mach_kernel as real MacOS X.
-
----
- os-probes/mounted/powerpc/20macosx |    2 +-
- 1 file changed, 1 insertion(+), 1 deletion(-)
-
-Index: b/os-probes/mounted/powerpc/20macosx
-===================================================================
---- a/os-probes/mounted/powerpc/20macosx
-+++ b/os-probes/mounted/powerpc/20macosx
-@@ -21,7 +21,7 @@ esac
- # but I don't think it exists on Mac OS <= 9, and it's XML so parsing in
- # shell will be nasty.
- 
--if [ -e "$2/mach_kernel" ]; then
-+if [ -e "$2/mach_kernel" ] && ! dd if="$2/mach_kernel" count=1 bs=5 2>/dev/null | grep -aq Dummy ; then
-   label="$(count_next_label MacOSX)"
-   result "$1:Mac OS X:$label:macosx"
-   exit 0
diff --git a/os-prober.spec b/os-prober.spec
index b228c03..0ed2478 100644
--- a/os-prober.spec
+++ b/os-prober.spec
@@ -1,22 +1,19 @@
 Name:           os-prober
 Version:        1.74
-Release:        10
+Release:        11
 Summary:        Probe disks on the system for other operating systems
 License:        GPLv2+ and GPL+
 URL:            http://kitenet.net/~joey/code/os-prober/
 Source0:        https://salsa.debian.org/installer-team/os-prober/-/archive/%{version}/%{name}-%{version}.tar.gz
 
-Patch0:         os-prober-no-dummy-mach-kernel.patch
-Patch1:         os-prober-mdraidfix.patch
-Patch2:         os-prober-btrfsfix.patch
-Patch3:         os-prober-bootpart-name-fix.patch
-Patch4:         os-prober-mounted-partitions-fix.patch
-Patch5:         os-prober-factor-out-logger.patch
-Patch6:         os-prober-factored-logger-efi-fix.patch
-Patch7:         os-prober-umount-fix.patch
-Patch8:         os-prober-grub2-parsefix.patch
-Patch9:         os-prober-grepfix.patch
-Patch10:        os-prober-gentoo-fix.patch
+Patch0:         os-prober-mdraidfix.patch
+Patch1:         os-prober-bootpart-name-fix.patch
+Patch2:         os-prober-mounted-partitions-fix.patch
+Patch3:         os-prober-umount-fix.patch
+Patch4:         os-prober-grub2-parsefix.patch
+Patch5:         os-prober-grepfix.patch
+Patch6:         os-prober-gentoo-fix.patch
+
 Patch9000:      bugfix-wait-for-device-mapper-device-is-created.patch
 
 BuildRequires:  gcc git
@@ -87,6 +84,9 @@ fi
 %{_libexecdir}/*
 
 %changelog
+* Mon Jan 13 2020 openEuler Buildteam <buildteam@openeuler.org> - 1.74-11
+- Delete useless files.
+
 * Tue Dec 31 2019 openEuler Buildteam <buildteam@openeuler.org> - 1.74-10
 - Type:bugfix
 - ID:NA