diff --git a/Makefile b/Makefile
index 6c6664d9a3..0095c72229 100644
--- a/Makefile
+++ b/Makefile
@@ -351,7 +351,7 @@ $(call set-vpath, $(SRC_PATH))
 
 LIBS+=-lz $(LIBS_TOOLS)
 
-HELPERS-$(CONFIG_LINUX) = qemu-bridge-helper$(EXESUF)
+HELPERS-$(call land,$(CONFIG_SOFTMMU),$(CONFIG_LINUX)) = qemu-bridge-helper$(EXESUF)
 
 ifdef BUILD_DOCS
 DOCS=qemu-doc.html qemu-doc.txt qemu.1 qemu-img.1 qemu-nbd.8 qemu-ga.8
diff --git a/linux-user/alpha/syscall_nr.h b/linux-user/alpha/syscall_nr.h
index 00e14bb6b3..fbb1ed288b 100644
--- a/linux-user/alpha/syscall_nr.h
+++ b/linux-user/alpha/syscall_nr.h
@@ -343,9 +343,9 @@
 #define TARGET_NR_io_cancel			402
 #define TARGET_NR_exit_group			405
 #define TARGET_NR_lookup_dcookie		406
-#define TARGET_NR_sys_epoll_create		407
-#define TARGET_NR_sys_epoll_ctl		408
-#define TARGET_NR_sys_epoll_wait		409
+#define TARGET_NR_epoll_create          407
+#define TARGET_NR_epoll_ctl             408
+#define TARGET_NR_epoll_wait            409
 #define TARGET_NR_remap_file_pages		410
 #define TARGET_NR_set_tid_address		411
 #define TARGET_NR_restart_syscall		412
diff --git a/linux-user/flatload.c b/linux-user/flatload.c
index a35a560904..10c529910f 100644
--- a/linux-user/flatload.c
+++ b/linux-user/flatload.c
@@ -224,8 +224,9 @@ static int decompress_exec(
 		ret = bprm->file->f_op->read(bprm->file, buf, LBUFSIZE, &fpos);
 		if (ret <= 0)
 			break;
-		if (ret >= (unsigned long) -4096)
+                if (is_error(ret)) {
 			break;
+                }
 		len -= ret;
 
 		strm.next_in = buf;
@@ -283,8 +284,7 @@ calc_reloc(abi_ulong r, struct lib_info *p, int curid, int internalp)
                     "in same module (%d != %d)\n",
                     (unsigned) r, curid, id);
             goto failed;
-        } else if ( ! p[id].loaded &&
-                    load_flat_shared_library(id, p) > (unsigned long) -4096) {
+        } else if (!p[id].loaded && is_error(load_flat_shared_library(id, p))) {
             fprintf(stderr, "BINFMT_FLAT: failed to load library %d\n", id);
             goto failed;
         }
@@ -523,9 +523,10 @@ static int load_flat_file(struct linux_binprm * bprm,
                 fpos = 0;
                 result = bprm->file->f_op->read(bprm->file,
                                 (char *) textpos, text_len, &fpos);
-                if (result < (unsigned long) -4096)
+                if (!is_error(result)) {
                         result = decompress_exec(bprm, text_len, (char *) datapos,
                                          data_len + (relocs * sizeof(unsigned long)), 0);
+                }
         }
         else
 #endif
@@ -693,8 +694,9 @@ static int load_flat_shared_library(int id, struct lib_info *libs)
 
 	res = prepare_binprm(&bprm);
 
-	if (res <= (unsigned long)-4096)
+        if (!is_error(res)) {
 		res = load_flat_file(&bprm, libs, id, NULL);
+        }
 	if (bprm.file) {
 		allow_write_access(bprm.file);
 		fput(bprm.file);
@@ -737,8 +739,9 @@ int load_flt_binary(struct linux_binprm *bprm, struct image_info *info)
 
 
     res = load_flat_file(bprm, libinfo, 0, &stack_len);
-    if (res > (unsigned long)-4096)
+    if (is_error(res)) {
             return res;
+    }
 
     /* Update data segment pointers for all libraries */
     for (i=0; i<MAX_SHARED_LIBS; i++) {
diff --git a/linux-user/hppa/syscall_nr.h b/linux-user/hppa/syscall_nr.h
index 55bdf71d50..9c1d0a195d 100644
--- a/linux-user/hppa/syscall_nr.h
+++ b/linux-user/hppa/syscall_nr.h
@@ -279,7 +279,7 @@
 #define TARGET_NR_ppoll             274
 #define TARGET_NR_openat            275
 #define TARGET_NR_mkdirat           276
-#define TARGET_NR_mknotat           277
+#define TARGET_NR_mknodat           277
 #define TARGET_NR_fchownat          278
 #define TARGET_NR_futimesat         279
 #define TARGET_NR_fstatat64         280
diff --git a/linux-user/microblaze/syscall_nr.h b/linux-user/microblaze/syscall_nr.h
index 0704449bae..5d1a47a9a9 100644
--- a/linux-user/microblaze/syscall_nr.h
+++ b/linux-user/microblaze/syscall_nr.h
@@ -363,7 +363,7 @@
 #define TARGET_NR_shutdown		359 /* new */
 #define TARGET_NR_sendmsg		360 /* new */
 #define TARGET_NR_recvmsg		361 /* new */
-#define TARGET_NR_accept04		362 /* new */
+#define TARGET_NR_accept4               362 /* new */
 #define TARGET_NR_preadv                363 /* new */
 #define TARGET_NR_pwritev               364 /* new */
 #define TARGET_NR_rt_tgsigqueueinfo     365 /* new */
diff --git a/linux-user/qemu.h b/linux-user/qemu.h
index 6fa1e968db..793cd4df04 100644
--- a/linux-user/qemu.h
+++ b/linux-user/qemu.h
@@ -618,6 +618,11 @@ static inline void *lock_user_string(abi_ulong guest_addr)
 
 #include <pthread.h>
 
+static inline int is_error(abi_long ret)
+{
+    return (abi_ulong)ret >= (abi_ulong)(-4096);
+}
+
 /* Include target-specific struct and function definitions;
  * they may need access to the target-independent structures
  * above, so include them last.
diff --git a/linux-user/sparc64/syscall_nr.h b/linux-user/sparc64/syscall_nr.h
index 9391645598..0b91b896da 100644
--- a/linux-user/sparc64/syscall_nr.h
+++ b/linux-user/sparc64/syscall_nr.h
@@ -154,7 +154,7 @@
 #define TARGET_NR_poll               153 /* Common                                      */
 #define TARGET_NR_getdents64		154 /* Linux specific				   */
 #define TARGET_NR_fcntl64            155 /* Linux sparc32 Specific                      */
-/* #define TARGET_NR_getdirentries   156    SunOS Specific                              */
+#define TARGET_NR_inotify_rm_watch   156 /* Linux specific                              */
 #define TARGET_NR_statfs             157 /* Common                                      */
 #define TARGET_NR_fstatfs            158 /* Common                                      */
 #define TARGET_NR_umount             159 /* Common                                      */
@@ -278,7 +278,7 @@
 #define TARGET_NR_mq_notify		277
 #define TARGET_NR_mq_getsetattr	278
 #define TARGET_NR_waitid		279
-/*#define TARGET_NR_sys_setaltroot	280 available (was setaltroot) */
+#define TARGET_NR_tee                   280
 #define TARGET_NR_add_key		281
 #define TARGET_NR_request_key	282
 #define TARGET_NR_keyctl		283
diff --git a/linux-user/strace.list b/linux-user/strace.list
index a91e33f7e5..2bc5ba04d4 100644
--- a/linux-user/strace.list
+++ b/linux-user/strace.list
@@ -1467,15 +1467,6 @@
 #ifdef TARGET_NR__sysctl
 { TARGET_NR__sysctl, "_sysctl" , NULL, NULL, NULL },
 #endif
-#ifdef TARGET_NR_sys_epoll_create
-{ TARGET_NR_sys_epoll_create, "sys_epoll_create" , NULL, NULL, NULL },
-#endif
-#ifdef TARGET_NR_sys_epoll_ctl
-{ TARGET_NR_sys_epoll_ctl, "sys_epoll_ctl" , NULL, NULL, NULL },
-#endif
-#ifdef TARGET_NR_sys_epoll_wait
-{ TARGET_NR_sys_epoll_wait, "sys_epoll_wait" , NULL, NULL, NULL },
-#endif
 #ifdef TARGET_NR_sysfs
 { TARGET_NR_sysfs, "sysfs" , NULL, NULL, NULL },
 #endif
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 7b9ac3b408..2117fb13b4 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -906,11 +906,6 @@ static inline abi_long get_errno(abi_long ret)
         return ret;
 }
 
-static inline int is_error(abi_long ret)
-{
-    return (abi_ulong)ret >= (abi_ulong)(-4096);
-}
-
 const char *target_strerror(int err)
 {
     if (err == TARGET_ERESTARTSYS) {
diff --git a/scripts/qemu-binfmt-conf.sh b/scripts/qemu-binfmt-conf.sh
index 7ab7435fbd..d7eefda0b8 100755
--- a/scripts/qemu-binfmt-conf.sh
+++ b/scripts/qemu-binfmt-conf.sh
@@ -7,15 +7,15 @@ mips mipsel mipsn32 mipsn32el mips64 mips64el \
 sh4 sh4eb s390x aarch64 aarch64_be hppa riscv32 riscv64 xtensa xtensaeb microblaze microblazeel"
 
 i386_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x03\x00'
-i386_mask='\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
+i386_mask='\xff\xff\xff\xff\xff\xfe\xfe\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
 i386_family=i386
 
 i486_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x06\x00'
-i486_mask='\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
+i486_mask='\xff\xff\xff\xff\xff\xfe\xfe\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
 i486_family=i386
 
 alpha_magic='\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x26\x90'
-alpha_mask='\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
+alpha_mask='\xff\xff\xff\xff\xff\xfe\xfe\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
 alpha_family=alpha
 
 arm_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x28\x00'
@@ -27,11 +27,11 @@ armeb_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff
 armeb_family=armeb
 
 sparc_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x02'
-sparc_mask='\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
+sparc_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
 sparc_family=sparc
 
 sparc32plus_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x12'
-sparc32plus_mask='\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
+sparc32plus_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
 sparc32plus_family=sparc
 
 ppc_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x14'
@@ -47,7 +47,7 @@ ppc64le_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\x
 ppc64le_family=ppcle
 
 m68k_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x04'
-m68k_mask='\xff\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
+m68k_mask='\xff\xff\xff\xff\xff\xff\xfe\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
 m68k_family=m68k
 
 # FIXME: We could use the other endianness on a MIPS host.
@@ -77,15 +77,15 @@ mips64el_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\
 mips64el_family=mips
 
 sh4_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x2a\x00'
-sh4_mask='\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
+sh4_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
 sh4_family=sh4
 
 sh4eb_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x2a'
-sh4eb_mask='\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
+sh4eb_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
 sh4eb_family=sh4
 
 s390x_magic='\x7fELF\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x16'
-s390x_mask='\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
+s390x_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
 s390x_family=s390x
 
 aarch64_magic='\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\xb7\x00'
diff --git a/tests/Makefile.include b/tests/Makefile.include
index bb08e37b9d..607afe5bed 100644
--- a/tests/Makefile.include
+++ b/tests/Makefile.include
@@ -929,7 +929,7 @@ check-report.html: check-report.xml
 
 # Other tests
 
-QEMU_IOTESTS_HELPERS-$(CONFIG_LINUX) = tests/qemu-iotests/socket_scm_helper$(EXESUF)
+QEMU_IOTESTS_HELPERS-$(call land,$(CONFIG_SOFTMMU),$(CONFIG_LINUX)) = tests/qemu-iotests/socket_scm_helper$(EXESUF)
 
 .PHONY: check-tests/qemu-iotests-quick.sh
 check-tests/qemu-iotests-quick.sh: tests/qemu-iotests-quick.sh qemu-img$(EXESUF) qemu-io$(EXESUF) $(QEMU_IOTESTS_HELPERS-y)