diff --git a/disable-Werror.patch b/disable-Werror.patch
new file mode 100644
index 0000000..2d52c67
--- /dev/null
+++ b/disable-Werror.patch
@@ -0,0 +1,11 @@
+--- mdadm/Makefile.orig	2021-07-28 21:39:23.887433859 +0800
++++ mdadm/Makefile	2021-07-28 21:39:37.989432841 +0800
+@@ -50,7 +50,7 @@
+ CC := $(CROSS_COMPILE)gcc
+ endif
+ CXFLAGS ?= -ggdb
+-CWFLAGS = -Wall -Werror -Wstrict-prototypes -Wextra -Wno-unused-parameter
++CWFLAGS = -Wall -Wstrict-prototypes -Wextra -Wno-unused-parameter
+ ifdef WARN_UNUSED
+ CWFLAGS += -Wp,-D_FORTIFY_SOURCE=2 -O3
+ endif
diff --git a/mdadm-2.5.2-static.patch b/mdadm-2.5.2-static.patch
index 1eb335a..188b478 100644
--- a/mdadm-2.5.2-static.patch
+++ b/mdadm-2.5.2-static.patch
@@ -1,7 +1,7 @@
---- mdadm-3.2.1/Makefile.static	2011-03-27 22:31:20.000000000 -0400
-+++ mdadm-3.2.1/Makefile	2011-03-28 10:16:55.277900184 -0400
-@@ -238,16 +238,16 @@ install : mdadm mdmon install-man instal
- 	$(INSTALL) -D $(STRIP) -m 755 mdmon $(DESTDIR)$(BINDIR)/mdmon
+--- mdadm-3.2.1/Makefile.static	2021-01-11 15:46:47.292126848 +0800
++++ mdadm-3.2.1/Makefile	2021-01-11 15:46:10.720192519 +0800
+@@ -248,16 +248,16 @@
+ install : install-bin install-man install-udev
  
  install-static : mdadm.static install-man
 -	$(INSTALL) -D $(STRIP) -m 755 mdadm.static $(DESTDIR)$(BINDIR)/mdadm
diff --git a/mdadm.spec b/mdadm.spec
index f1c612d..5490bcd 100644
--- a/mdadm.spec
+++ b/mdadm.spec
@@ -1,12 +1,12 @@
 Name:        mdadm
-Version:     4.1
-#define subversion rc2
-Release:     8%{?subversion:.%{subversion}}%{?dist}
+Version:     4.2
+%define subversion rc2
+Release:     rc2%{?dist}
 Summary:     The mdadm program controls Linux md devices (software RAID arrays)
 URL:         http://www.kernel.org/pub/linux/utils/raid/mdadm/
 License:     GPLv2+
 
-Source:      http://www.kernel.org/pub/linux/utils/raid/mdadm/%{name}-%{version}%{?subversion:-%{subversion}}.tar.xz
+Source:      http://www.kernel.org/pub/linux/utils/raid/mdadm/mdadm-%{version}%{?subversion:-%{subversion}}.tar.xz
 Source1:     raid-check
 Source2:     mdadm.rules
 Source3:     mdadm-raid-check-sysconfig
@@ -16,15 +16,15 @@ Source6:     mdadm_event.conf
 Source7:     raid-check.timer
 Source8:     raid-check.service
 
-# Build without -Werror.  From Debian.
-Patch00:     https://sources.debian.org/data/main/m/mdadm/4.1-2/debian/patches/debian-no-Werror.diff#/mdadm-4.1-no-Werror.patch
+# Build without -Werror.
+Patch00:    disable-Werror.patch
 
 # Fedora customization patches
-Patch97:     mdadm-3.3-udev.patch
-Patch98:     mdadm-2.5.2-static.patch
+Patch97:    mdadm-3.3-udev.patch
+Patch98:    mdadm-2.5.2-static.patch
 
 BuildRequires: make
-BuildRequires: systemd-rpm-macros binutils-devel gcc
+BuildRequires: systemd-rpm-macros binutils-devel gcc systemd-devel
 Requires: libreport-filesystem
 Requires(post): systemd coreutils
 Requires(preun): systemd
@@ -90,6 +90,10 @@ install -m644 %{SOURCE6} %{buildroot}/etc/libreport/events.d
 /etc/libreport/events.d/*
 
 %changelog
+* Tue Aug 03 2021 Xiao Ni <xni@redhat.com> - 4.2-rc2
+- Update to mdadm-4.2-rc2
+- Resolves rhbz#1870487, rhbz#1880529
+
 * Fri Apr 16 2021 Mohan Boddu <mboddu@redhat.com> - 4.1-8
 - Rebuilt for RHEL 9 BETA on Apr 15th 2021. Related: rhbz#1947937
 
diff --git a/sources b/sources
index 8f50f97..a190524 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (mdadm-4.1.tar.xz) = 0859c5d3e786345d93ff2c3b291ca8866ba60f1375479e5b4d343124f6824140a8268d42b8ae603b069edba761aa30aaf20d49e9ec54dfcbad34bad3bea0e433
+SHA512 (mdadm-4.2-rc2.tar.xz) = 09a3657284c7f98892f5be663d5e034252ff319d8ff1d235597efc373c156188d450e12f64a9a0fb9266b00035c1602133e487ce1961db1a12db05f7f9829249