diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 318fce77601d..de575af02ffe 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -568,8 +568,7 @@ config EXPOLINE_FULL
 endchoice
 
 config RELOCATABLE
-	bool "Build a relocatable kernel"
-	default y
+	def_bool y
 	help
 	  This builds a kernel image that retains relocation information
 	  so it can be loaded at an arbitrary address.
@@ -578,10 +577,11 @@ config RELOCATABLE
 	  bootup process.
 	  The relocations make the kernel image about 15% larger (compressed
 	  10%), but are discarded at runtime.
+	  Note: this option exists only for documentation purposes, please do
+	  not remove it.
 
 config RANDOMIZE_BASE
 	bool "Randomize the address of the kernel image (KASLR)"
-	depends on RELOCATABLE
 	default y
 	help
 	  In support of Kernel Address Space Layout Randomization (KASLR),
diff --git a/arch/s390/Makefile b/arch/s390/Makefile
index de6d8b2ea4d8..b3235ab0ace8 100644
--- a/arch/s390/Makefile
+++ b/arch/s390/Makefile
@@ -14,10 +14,8 @@ KBUILD_AFLAGS_MODULE += -fPIC
 KBUILD_CFLAGS_MODULE += -fPIC
 KBUILD_AFLAGS	+= -m64
 KBUILD_CFLAGS	+= -m64
-ifeq ($(CONFIG_RELOCATABLE),y)
 KBUILD_CFLAGS	+= -fPIE
 LDFLAGS_vmlinux	:= -pie
-endif
 aflags_dwarf	:= -Wa,-gdwarf-2
 KBUILD_AFLAGS_DECOMPRESSOR := $(CLANG_FLAGS) -m64 -D__ASSEMBLY__
 ifndef CONFIG_AS_IS_LLVM
diff --git a/arch/s390/boot/Makefile b/arch/s390/boot/Makefile
index 883357a211a3..d52c3e2e16bc 100644
--- a/arch/s390/boot/Makefile
+++ b/arch/s390/boot/Makefile
@@ -37,9 +37,8 @@ CFLAGS_sclp_early_core.o += -I$(srctree)/drivers/s390/char
 
 obj-y	:= head.o als.o startup.o mem_detect.o ipl_parm.o ipl_report.o
 obj-y	+= string.o ebcdic.o sclp_early_core.o mem.o ipl_vmparm.o cmdline.o
-obj-y	+= version.o pgm_check_info.o ctype.o ipl_data.o
+obj-y	+= version.o pgm_check_info.o ctype.o ipl_data.o machine_kexec_reloc.o
 obj-$(findstring y, $(CONFIG_PROTECTED_VIRTUALIZATION_GUEST) $(CONFIG_PGSTE))	+= uv.o
-obj-$(CONFIG_RELOCATABLE)	+= machine_kexec_reloc.o
 obj-$(CONFIG_RANDOMIZE_BASE)	+= kaslr.o
 obj-y	+= $(if $(CONFIG_KERNEL_UNCOMPRESSED),,decompressor.o) info.o
 obj-$(CONFIG_KERNEL_ZSTD) += clz_ctz.o
diff --git a/arch/s390/boot/startup.c b/arch/s390/boot/startup.c
index 6e7f01ca53e6..47ca3264c023 100644
--- a/arch/s390/boot/startup.c
+++ b/arch/s390/boot/startup.c
@@ -291,8 +291,7 @@ void startup_kernel(void)
 
 	clear_bss_section();
 	copy_bootdata();
-	if (IS_ENABLED(CONFIG_RELOCATABLE))
-		handle_relocs(__kaslr_offset);
+	handle_relocs(__kaslr_offset);
 
 	if (__kaslr_offset) {
 		/*
diff --git a/arch/s390/configs/btf.config b/arch/s390/configs/btf.config
new file mode 100644
index 000000000000..39227b4511af
--- /dev/null
+++ b/arch/s390/configs/btf.config
@@ -0,0 +1 @@
+CONFIG_DEBUG_INFO_BTF=y
diff --git a/arch/s390/configs/debug_defconfig b/arch/s390/configs/debug_defconfig
index 2a827002934b..63807bd0b536 100644
--- a/arch/s390/configs/debug_defconfig
+++ b/arch/s390/configs/debug_defconfig
@@ -723,52 +723,42 @@ CONFIG_CRYPTO_ECDSA=m
 CONFIG_CRYPTO_ECRDSA=m
 CONFIG_CRYPTO_SM2=m
 CONFIG_CRYPTO_CURVE25519=m
-CONFIG_CRYPTO_GCM=y
-CONFIG_CRYPTO_CHACHA20POLY1305=m
-CONFIG_CRYPTO_AEGIS128=m
-CONFIG_CRYPTO_SEQIV=y
-CONFIG_CRYPTO_CFB=m
-CONFIG_CRYPTO_LRW=m
-CONFIG_CRYPTO_PCBC=m
-CONFIG_CRYPTO_KEYWRAP=m
-CONFIG_CRYPTO_ADIANTUM=m
-CONFIG_CRYPTO_HCTR2=m
-CONFIG_CRYPTO_XCBC=m
-CONFIG_CRYPTO_VMAC=m
-CONFIG_CRYPTO_CRC32=m
-CONFIG_CRYPTO_CRC32_S390=y
-CONFIG_CRYPTO_MD4=m
-CONFIG_CRYPTO_MD5=y
-CONFIG_CRYPTO_MICHAEL_MIC=m
-CONFIG_CRYPTO_RMD160=m
-CONFIG_CRYPTO_SHA512_S390=m
-CONFIG_CRYPTO_SHA1_S390=m
-CONFIG_CRYPTO_SHA256_S390=m
-CONFIG_CRYPTO_SHA3=m
-CONFIG_CRYPTO_SHA3_256_S390=m
-CONFIG_CRYPTO_SHA3_512_S390=m
-CONFIG_CRYPTO_SM3_GENERIC=m
-CONFIG_CRYPTO_WP512=m
-CONFIG_CRYPTO_GHASH_S390=m
 CONFIG_CRYPTO_AES_TI=m
-CONFIG_CRYPTO_AES_S390=m
 CONFIG_CRYPTO_ANUBIS=m
-CONFIG_CRYPTO_ARC4=m
+CONFIG_CRYPTO_ARIA=m
 CONFIG_CRYPTO_BLOWFISH=m
 CONFIG_CRYPTO_CAMELLIA=m
 CONFIG_CRYPTO_CAST5=m
 CONFIG_CRYPTO_CAST6=m
 CONFIG_CRYPTO_DES=m
-CONFIG_CRYPTO_DES_S390=m
 CONFIG_CRYPTO_FCRYPT=m
 CONFIG_CRYPTO_KHAZAD=m
-CONFIG_CRYPTO_CHACHA_S390=m
 CONFIG_CRYPTO_SEED=m
-CONFIG_CRYPTO_ARIA=m
 CONFIG_CRYPTO_SERPENT=m
 CONFIG_CRYPTO_SM4_GENERIC=m
 CONFIG_CRYPTO_TEA=m
 CONFIG_CRYPTO_TWOFISH=m
+CONFIG_CRYPTO_ADIANTUM=m
+CONFIG_CRYPTO_ARC4=m
+CONFIG_CRYPTO_CFB=m
+CONFIG_CRYPTO_HCTR2=m
+CONFIG_CRYPTO_KEYWRAP=m
+CONFIG_CRYPTO_LRW=m
+CONFIG_CRYPTO_PCBC=m
+CONFIG_CRYPTO_AEGIS128=m
+CONFIG_CRYPTO_CHACHA20POLY1305=m
+CONFIG_CRYPTO_GCM=y
+CONFIG_CRYPTO_SEQIV=y
+CONFIG_CRYPTO_MD4=m
+CONFIG_CRYPTO_MD5=y
+CONFIG_CRYPTO_MICHAEL_MIC=m
+CONFIG_CRYPTO_RMD160=m
+CONFIG_CRYPTO_SHA3=m
+CONFIG_CRYPTO_SM3_GENERIC=m
+CONFIG_CRYPTO_VMAC=m
+CONFIG_CRYPTO_WP512=m
+CONFIG_CRYPTO_XCBC=m
+CONFIG_CRYPTO_CRC32=m
 CONFIG_CRYPTO_842=m
 CONFIG_CRYPTO_LZ4=m
 CONFIG_CRYPTO_LZ4HC=m
@@ -779,6 +769,16 @@ CONFIG_CRYPTO_USER_API_SKCIPHER=m
 CONFIG_CRYPTO_USER_API_RNG=m
 CONFIG_CRYPTO_USER_API_AEAD=m
 CONFIG_CRYPTO_STATS=y
+CONFIG_CRYPTO_CRC32_S390=y
+CONFIG_CRYPTO_SHA512_S390=m
+CONFIG_CRYPTO_SHA1_S390=m
+CONFIG_CRYPTO_SHA256_S390=m
+CONFIG_CRYPTO_SHA3_256_S390=m
+CONFIG_CRYPTO_SHA3_512_S390=m
+CONFIG_CRYPTO_GHASH_S390=m
+CONFIG_CRYPTO_AES_S390=m
+CONFIG_CRYPTO_DES_S390=m
+CONFIG_CRYPTO_CHACHA_S390=m
 CONFIG_ZCRYPT=m
 CONFIG_PKEY=m
 CONFIG_CRYPTO_PAES_S390=m
@@ -797,7 +797,6 @@ CONFIG_CMA_SIZE_MBYTES=0
 CONFIG_PRINTK_TIME=y
 CONFIG_DYNAMIC_DEBUG=y
 CONFIG_DEBUG_INFO_DWARF4=y
-CONFIG_DEBUG_INFO_BTF=y
 CONFIG_GDB_SCRIPTS=y
 CONFIG_HEADERS_INSTALL=y
 CONFIG_DEBUG_SECTION_MISMATCH=y
diff --git a/arch/s390/configs/defconfig b/arch/s390/configs/defconfig
index fb780e80e4c8..4f9a98247442 100644
--- a/arch/s390/configs/defconfig
+++ b/arch/s390/configs/defconfig
@@ -707,53 +707,43 @@ CONFIG_CRYPTO_ECDSA=m
 CONFIG_CRYPTO_ECRDSA=m
 CONFIG_CRYPTO_SM2=m
 CONFIG_CRYPTO_CURVE25519=m
-CONFIG_CRYPTO_GCM=y
-CONFIG_CRYPTO_CHACHA20POLY1305=m
-CONFIG_CRYPTO_AEGIS128=m
-CONFIG_CRYPTO_SEQIV=y
-CONFIG_CRYPTO_CFB=m
-CONFIG_CRYPTO_LRW=m
-CONFIG_CRYPTO_OFB=m
-CONFIG_CRYPTO_PCBC=m
-CONFIG_CRYPTO_KEYWRAP=m
-CONFIG_CRYPTO_ADIANTUM=m
-CONFIG_CRYPTO_HCTR2=m
-CONFIG_CRYPTO_XCBC=m
-CONFIG_CRYPTO_VMAC=m
-CONFIG_CRYPTO_CRC32=m
-CONFIG_CRYPTO_CRC32_S390=y
-CONFIG_CRYPTO_MD4=m
-CONFIG_CRYPTO_MD5=y
-CONFIG_CRYPTO_MICHAEL_MIC=m
-CONFIG_CRYPTO_RMD160=m
-CONFIG_CRYPTO_SHA512_S390=m
-CONFIG_CRYPTO_SHA1_S390=m
-CONFIG_CRYPTO_SHA256_S390=m
-CONFIG_CRYPTO_SHA3=m
-CONFIG_CRYPTO_SHA3_256_S390=m
-CONFIG_CRYPTO_SHA3_512_S390=m
-CONFIG_CRYPTO_SM3_GENERIC=m
-CONFIG_CRYPTO_WP512=m
-CONFIG_CRYPTO_GHASH_S390=m
 CONFIG_CRYPTO_AES_TI=m
-CONFIG_CRYPTO_AES_S390=m
 CONFIG_CRYPTO_ANUBIS=m
-CONFIG_CRYPTO_ARC4=m
+CONFIG_CRYPTO_ARIA=m
 CONFIG_CRYPTO_BLOWFISH=m
 CONFIG_CRYPTO_CAMELLIA=m
 CONFIG_CRYPTO_CAST5=m
 CONFIG_CRYPTO_CAST6=m
 CONFIG_CRYPTO_DES=m
-CONFIG_CRYPTO_DES_S390=m
 CONFIG_CRYPTO_FCRYPT=m
 CONFIG_CRYPTO_KHAZAD=m
-CONFIG_CRYPTO_CHACHA_S390=m
 CONFIG_CRYPTO_SEED=m
-CONFIG_CRYPTO_ARIA=m
 CONFIG_CRYPTO_SERPENT=m
 CONFIG_CRYPTO_SM4_GENERIC=m
 CONFIG_CRYPTO_TEA=m
 CONFIG_CRYPTO_TWOFISH=m
+CONFIG_CRYPTO_ADIANTUM=m
+CONFIG_CRYPTO_ARC4=m
+CONFIG_CRYPTO_CFB=m
+CONFIG_CRYPTO_HCTR2=m
+CONFIG_CRYPTO_KEYWRAP=m
+CONFIG_CRYPTO_LRW=m
+CONFIG_CRYPTO_OFB=m
+CONFIG_CRYPTO_PCBC=m
+CONFIG_CRYPTO_AEGIS128=m
+CONFIG_CRYPTO_CHACHA20POLY1305=m
+CONFIG_CRYPTO_GCM=y
+CONFIG_CRYPTO_SEQIV=y
+CONFIG_CRYPTO_MD4=m
+CONFIG_CRYPTO_MD5=y
+CONFIG_CRYPTO_MICHAEL_MIC=m
+CONFIG_CRYPTO_RMD160=m
+CONFIG_CRYPTO_SHA3=m
+CONFIG_CRYPTO_SM3_GENERIC=m
+CONFIG_CRYPTO_VMAC=m
+CONFIG_CRYPTO_WP512=m
+CONFIG_CRYPTO_XCBC=m
+CONFIG_CRYPTO_CRC32=m
 CONFIG_CRYPTO_842=m
 CONFIG_CRYPTO_LZ4=m
 CONFIG_CRYPTO_LZ4HC=m
@@ -764,6 +754,16 @@ CONFIG_CRYPTO_USER_API_SKCIPHER=m
 CONFIG_CRYPTO_USER_API_RNG=m
 CONFIG_CRYPTO_USER_API_AEAD=m
 CONFIG_CRYPTO_STATS=y
+CONFIG_CRYPTO_CRC32_S390=y
+CONFIG_CRYPTO_SHA512_S390=m
+CONFIG_CRYPTO_SHA1_S390=m
+CONFIG_CRYPTO_SHA256_S390=m
+CONFIG_CRYPTO_SHA3_256_S390=m
+CONFIG_CRYPTO_SHA3_512_S390=m
+CONFIG_CRYPTO_GHASH_S390=m
+CONFIG_CRYPTO_AES_S390=m
+CONFIG_CRYPTO_DES_S390=m
+CONFIG_CRYPTO_CHACHA_S390=m
 CONFIG_ZCRYPT=m
 CONFIG_PKEY=m
 CONFIG_CRYPTO_PAES_S390=m
@@ -781,7 +781,6 @@ CONFIG_CMA_SIZE_MBYTES=0
 CONFIG_PRINTK_TIME=y
 CONFIG_DYNAMIC_DEBUG=y
 CONFIG_DEBUG_INFO_DWARF4=y
-CONFIG_DEBUG_INFO_BTF=y
 CONFIG_GDB_SCRIPTS=y
 CONFIG_DEBUG_SECTION_MISMATCH=y
 CONFIG_MAGIC_SYSRQ=y
diff --git a/arch/s390/configs/kasan.config b/arch/s390/configs/kasan.config
new file mode 100644
index 000000000000..700a8b25c3ff
--- /dev/null
+++ b/arch/s390/configs/kasan.config
@@ -0,0 +1,3 @@
+CONFIG_KASAN=y
+CONFIG_KASAN_INLINE=y
+CONFIG_KASAN_VMALLOC=y
diff --git a/arch/s390/configs/zfcpdump_defconfig b/arch/s390/configs/zfcpdump_defconfig
index a5576b8d4081..5fe9948be644 100644
--- a/arch/s390/configs/zfcpdump_defconfig
+++ b/arch/s390/configs/zfcpdump_defconfig
@@ -74,7 +74,6 @@ CONFIG_PRINTK_TIME=y
 # CONFIG_SYMBOLIC_ERRNAME is not set
 CONFIG_DEBUG_KERNEL=y
 CONFIG_DEBUG_INFO_DWARF4=y
-CONFIG_DEBUG_INFO_BTF=y
 CONFIG_DEBUG_FS=y
 CONFIG_PANIC_ON_OOPS=y
 # CONFIG_SCHED_DEBUG is not set
diff --git a/drivers/s390/crypto/zcrypt_msgtype6.c b/drivers/s390/crypto/zcrypt_msgtype6.c
index 8fb34b8eeb18..5ad251477593 100644
--- a/drivers/s390/crypto/zcrypt_msgtype6.c
+++ b/drivers/s390/crypto/zcrypt_msgtype6.c
@@ -342,7 +342,10 @@ static int xcrb_msg_to_type6cprb_msgx(bool userspace, struct ap_message *ap_msg,
 	};
 	struct {
 		struct type6_hdr hdr;
-		struct CPRBX cprbx;
+		union {
+			struct CPRBX cprbx;
+			DECLARE_FLEX_ARRAY(u8, userdata);
+		};
 	} __packed * msg = ap_msg->msg;
 
 	int rcblen = CEIL4(xcrb->request_control_blk_length);
@@ -403,7 +406,8 @@ static int xcrb_msg_to_type6cprb_msgx(bool userspace, struct ap_message *ap_msg,
 	msg->hdr.fromcardlen2 = xcrb->reply_data_length;
 
 	/* prepare CPRB */
-	if (z_copy_from_user(userspace, &msg->cprbx, xcrb->request_control_blk_addr,
+	if (z_copy_from_user(userspace, msg->userdata,
+			     xcrb->request_control_blk_addr,
 			     xcrb->request_control_blk_length))
 		return -EFAULT;
 	if (msg->cprbx.cprb_len + sizeof(msg->hdr.function_code) >
@@ -469,9 +473,14 @@ static int xcrb_msg_to_type6_ep11cprb_msgx(bool userspace, struct ap_message *ap
 
 	struct {
 		struct type6_hdr hdr;
-		struct ep11_cprb cprbx;
-		unsigned char	pld_tag;	/* fixed value 0x30 */
-		unsigned char	pld_lenfmt;	/* payload length format */
+		union {
+			struct {
+				struct ep11_cprb cprbx;
+				unsigned char pld_tag;    /* fixed value 0x30 */
+				unsigned char pld_lenfmt; /* length format */
+			} __packed;
+			DECLARE_FLEX_ARRAY(u8, userdata);
+		};
 	} __packed * msg = ap_msg->msg;
 
 	struct pld_hdr {
@@ -500,7 +509,7 @@ static int xcrb_msg_to_type6_ep11cprb_msgx(bool userspace, struct ap_message *ap
 	msg->hdr.fromcardlen1 = xcrb->resp_len;
 
 	/* Import CPRB data from the ioctl input parameter */
-	if (z_copy_from_user(userspace, &msg->cprbx.cprb_len,
+	if (z_copy_from_user(userspace, msg->userdata,
 			     (char __force __user *)xcrb->req, xcrb->req_len)) {
 		return -EFAULT;
 	}
diff --git a/scripts/min-tool-version.sh b/scripts/min-tool-version.sh
index b6593eac5003..201bccfbc678 100755
--- a/scripts/min-tool-version.sh
+++ b/scripts/min-tool-version.sh
@@ -25,7 +25,7 @@ icc)
 	;;
 llvm)
 	if [ "$SRCARCH" = s390 ]; then
-		echo 14.0.0
+		echo 15.0.0
 	else
 		echo 11.0.0
 	fi