diff --git a/arch/alpha/kernel/syscalls/syscall.tbl b/arch/alpha/kernel/syscalls/syscall.tbl
index a17687e..7ac22e0 100644
--- a/arch/alpha/kernel/syscalls/syscall.tbl
+++ b/arch/alpha/kernel/syscalls/syscall.tbl
@@ -230,7 +230,7 @@
 259	common	osf_swapctl			sys_ni_syscall
 260	common	osf_memcntl			sys_ni_syscall
 261	common	osf_fdatasync			sys_ni_syscall
-300	common	bdflush				sys_bdflush
+300	common	bdflush				sys_ni_syscall
 301	common	sethae				sys_sethae
 302	common	mount				sys_mount
 303	common	old_adjtimex			sys_old_adjtimex
diff --git a/arch/arm/tools/syscall.tbl b/arch/arm/tools/syscall.tbl
index c5df117..f8a2d5a 100644
--- a/arch/arm/tools/syscall.tbl
+++ b/arch/arm/tools/syscall.tbl
@@ -147,7 +147,7 @@
 131	common	quotactl		sys_quotactl
 132	common	getpgid			sys_getpgid
 133	common	fchdir			sys_fchdir
-134	common	bdflush			sys_bdflush
+134	common	bdflush			sys_ni_syscall
 135	common	sysfs			sys_sysfs
 136	common	personality		sys_personality
 # 137 was sys_afs_syscall
diff --git a/arch/arm64/include/asm/unistd32.h b/arch/arm64/include/asm/unistd32.h
index 99ffcaf..03d4ca4 100644
--- a/arch/arm64/include/asm/unistd32.h
+++ b/arch/arm64/include/asm/unistd32.h
@@ -279,7 +279,7 @@ __SYSCALL(__NR_getpgid, sys_getpgid)
 #define __NR_fchdir 133
 __SYSCALL(__NR_fchdir, sys_fchdir)
 #define __NR_bdflush 134
-__SYSCALL(__NR_bdflush, sys_bdflush)
+__SYSCALL(__NR_bdflush, sys_ni_syscall)
 #define __NR_sysfs 135
 __SYSCALL(__NR_sysfs, sys_sysfs)
 #define __NR_personality 136
diff --git a/arch/ia64/kernel/syscalls/syscall.tbl b/arch/ia64/kernel/syscalls/syscall.tbl
index 6d07742..4b20224 100644
--- a/arch/ia64/kernel/syscalls/syscall.tbl
+++ b/arch/ia64/kernel/syscalls/syscall.tbl
@@ -123,7 +123,7 @@
 # 1135 was get_kernel_syms
 # 1136 was query_module
 113	common	quotactl			sys_quotactl
-114	common	bdflush				sys_bdflush
+114	common	bdflush				sys_ni_syscall
 115	common	sysfs				sys_sysfs
 116	common	personality			sys_personality
 117	common	afs_syscall			sys_ni_syscall
diff --git a/arch/m68k/fpsp040/skeleton.S b/arch/m68k/fpsp040/skeleton.S
index a8f4161..439395a 100644
--- a/arch/m68k/fpsp040/skeleton.S
+++ b/arch/m68k/fpsp040/skeleton.S
@@ -502,7 +502,8 @@ in_ea:
 	.section .fixup,#alloc,#execinstr
 	.even
 1:
-	jbra	fpsp040_die
+	jbsr	fpsp040_die
+	jbra	.Lnotkern
 
 	.section __ex_table,#alloc
 	.align	4
diff --git a/arch/m68k/kernel/syscalls/syscall.tbl b/arch/m68k/kernel/syscalls/syscall.tbl
index 541bc1b..3ec1291 100644
--- a/arch/m68k/kernel/syscalls/syscall.tbl
+++ b/arch/m68k/kernel/syscalls/syscall.tbl
@@ -141,7 +141,7 @@
 131	common	quotactl			sys_quotactl
 132	common	getpgid				sys_getpgid
 133	common	fchdir				sys_fchdir
-134	common	bdflush				sys_bdflush
+134	common	bdflush				sys_ni_syscall
 135	common	sysfs				sys_sysfs
 136	common	personality			sys_personality
 # 137 was afs_syscall
diff --git a/arch/m68k/kernel/traps.c b/arch/m68k/kernel/traps.c
index 9e12614..5b19fcd 100644
--- a/arch/m68k/kernel/traps.c
+++ b/arch/m68k/kernel/traps.c
@@ -1150,7 +1150,7 @@ asmlinkage void set_esp0(unsigned long ssp)
  */
 asmlinkage void fpsp040_die(void)
 {
-	do_exit(SIGSEGV);
+	force_sigsegv(SIGSEGV);
 }
 
 #ifdef CONFIG_M68KFPU_EMU
diff --git a/arch/microblaze/kernel/syscalls/syscall.tbl b/arch/microblaze/kernel/syscalls/syscall.tbl
index a176fac..9be3ace 100644
--- a/arch/microblaze/kernel/syscalls/syscall.tbl
+++ b/arch/microblaze/kernel/syscalls/syscall.tbl
@@ -141,7 +141,7 @@
 131	common	quotactl			sys_quotactl
 132	common	getpgid				sys_getpgid
 133	common	fchdir				sys_fchdir
-134	common	bdflush				sys_bdflush
+134	common	bdflush				sys_ni_syscall
 135	common	sysfs				sys_sysfs
 136	common	personality			sys_personality
 137	common	afs_syscall			sys_ni_syscall
diff --git a/arch/mips/kernel/syscalls/syscall_o32.tbl b/arch/mips/kernel/syscalls/syscall_o32.tbl
index 253f2cd..fae3588 100644
--- a/arch/mips/kernel/syscalls/syscall_o32.tbl
+++ b/arch/mips/kernel/syscalls/syscall_o32.tbl
@@ -145,7 +145,7 @@
 131	o32	quotactl			sys_quotactl
 132	o32	getpgid				sys_getpgid
 133	o32	fchdir				sys_fchdir
-134	o32	bdflush				sys_bdflush
+134	o32	bdflush				sys_ni_syscall
 135	o32	sysfs				sys_sysfs
 136	o32	personality			sys_personality			sys_32_personality
 137	o32	afs_syscall			sys_ni_syscall
diff --git a/arch/parisc/kernel/syscalls/syscall.tbl b/arch/parisc/kernel/syscalls/syscall.tbl
index e26187b..eaf0603 100644
--- a/arch/parisc/kernel/syscalls/syscall.tbl
+++ b/arch/parisc/kernel/syscalls/syscall.tbl
@@ -147,7 +147,7 @@
 131	common	quotactl		sys_quotactl
 132	common	getpgid			sys_getpgid
 133	common	fchdir			sys_fchdir
-134	common	bdflush			sys_bdflush
+134	common	bdflush			sys_ni_syscall
 135	common	sysfs			sys_sysfs
 136	32	personality		parisc_personality
 136	64	personality		sys_personality
diff --git a/arch/powerpc/kernel/syscalls/syscall.tbl b/arch/powerpc/kernel/syscalls/syscall.tbl
index aef2a29..6f3953f 100644
--- a/arch/powerpc/kernel/syscalls/syscall.tbl
+++ b/arch/powerpc/kernel/syscalls/syscall.tbl
@@ -176,7 +176,7 @@
 131	nospu	quotactl			sys_quotactl
 132	common	getpgid				sys_getpgid
 133	common	fchdir				sys_fchdir
-134	common	bdflush				sys_bdflush
+134	common	bdflush				sys_ni_syscall
 135	common	sysfs				sys_sysfs
 136	32	personality			sys_personality			ppc64_personality
 136	64	personality			ppc64_personality
diff --git a/arch/s390/kernel/syscalls/syscall.tbl b/arch/s390/kernel/syscalls/syscall.tbl
index 64d51ab..aa705e1 100644
--- a/arch/s390/kernel/syscalls/syscall.tbl
+++ b/arch/s390/kernel/syscalls/syscall.tbl
@@ -122,7 +122,7 @@
 131  common	quotactl		sys_quotactl			sys_quotactl
 132  common	getpgid			sys_getpgid			sys_getpgid
 133  common	fchdir			sys_fchdir			sys_fchdir
-134  common	bdflush			sys_bdflush			sys_bdflush
+134  common	bdflush			sys_ni_syscall			sys_ni_syscall
 135  common	sysfs			sys_sysfs			sys_sysfs
 136  common	personality		sys_s390_personality		sys_s390_personality
 137  common	afs_syscall		-				-
diff --git a/arch/sh/kernel/syscalls/syscall.tbl b/arch/sh/kernel/syscalls/syscall.tbl
index e0a70be..7bbd670 100644
--- a/arch/sh/kernel/syscalls/syscall.tbl
+++ b/arch/sh/kernel/syscalls/syscall.tbl
@@ -141,7 +141,7 @@
 131	common	quotactl			sys_quotactl
 132	common	getpgid				sys_getpgid
 133	common	fchdir				sys_fchdir
-134	common	bdflush				sys_bdflush
+134	common	bdflush				sys_ni_syscall
 135	common	sysfs				sys_sysfs
 136	common	personality			sys_personality
 # 137 was afs_syscall
diff --git a/arch/sparc/kernel/syscalls/syscall.tbl b/arch/sparc/kernel/syscalls/syscall.tbl
index 603f5a8..f520e9c 100644
--- a/arch/sparc/kernel/syscalls/syscall.tbl
+++ b/arch/sparc/kernel/syscalls/syscall.tbl
@@ -270,7 +270,7 @@
 222	common	delete_module		sys_delete_module
 223	common	get_kernel_syms		sys_ni_syscall
 224	common	getpgid			sys_getpgid
-225	common	bdflush			sys_bdflush
+225	common	bdflush			sys_ni_syscall
 226	common	sysfs			sys_sysfs
 227	common	afs_syscall		sys_nis_syscall
 228	common	setfsuid		sys_setfsuid16
diff --git a/arch/x86/entry/syscalls/syscall_32.tbl b/arch/x86/entry/syscalls/syscall_32.tbl
index ce763a1..a5beae6 100644
--- a/arch/x86/entry/syscalls/syscall_32.tbl
+++ b/arch/x86/entry/syscalls/syscall_32.tbl
@@ -145,7 +145,7 @@
 131	i386	quotactl		sys_quotactl
 132	i386	getpgid			sys_getpgid
 133	i386	fchdir			sys_fchdir
-134	i386	bdflush			sys_bdflush
+134	i386	bdflush			sys_ni_syscall
 135	i386	sysfs			sys_sysfs
 136	i386	personality		sys_personality
 137	i386	afs_syscall
diff --git a/arch/xtensa/kernel/syscalls/syscall.tbl b/arch/xtensa/kernel/syscalls/syscall.tbl
index 235d67d..b3d1bc8 100644
--- a/arch/xtensa/kernel/syscalls/syscall.tbl
+++ b/arch/xtensa/kernel/syscalls/syscall.tbl
@@ -223,7 +223,7 @@
 # 205 was old nfsservctl
 205	common	nfsservctl			sys_ni_syscall
 206	common	_sysctl				sys_ni_syscall
-207	common	bdflush				sys_bdflush
+207	common	bdflush				sys_ni_syscall
 208	common	uname				sys_newuname
 209	common	sysinfo				sys_sysinfo
 210	common	init_module			sys_init_module
diff --git a/fs/buffer.c b/fs/buffer.c
index bd6a9e9..ab7573d 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -3268,33 +3268,6 @@ out:
 EXPORT_SYMBOL(try_to_free_buffers);
 
 /*
- * There are no bdflush tunables left.  But distributions are
- * still running obsolete flush daemons, so we terminate them here.
- *
- * Use of bdflush() is deprecated and will be removed in a future kernel.
- * The `flush-X' kernel threads fully replace bdflush daemons and this call.
- */
-SYSCALL_DEFINE2(bdflush, int, func, long, data)
-{
-	static int msg_count;
-
-	if (!capable(CAP_SYS_ADMIN))
-		return -EPERM;
-
-	if (msg_count < 5) {
-		msg_count++;
-		printk(KERN_INFO
-			"warning: process `%s' used the obsolete bdflush"
-			" system call\n", current->comm);
-		printk(KERN_INFO "Fix your initscripts?\n");
-	}
-
-	if (func == 1)
-		do_exit(0);
-	return 0;
-}
-
-/*
  * Buffer-head allocation
  */
 static struct kmem_cache *bh_cachep __read_mostly;
diff --git a/include/linux/sched/signal.h b/include/linux/sched/signal.h
index 548986c..e5f4ce6 100644
--- a/include/linux/sched/signal.h
+++ b/include/linux/sched/signal.h
@@ -324,6 +324,7 @@ int force_sig_ptrace_errno_trap(int errno, void __user *addr);
 int force_sig_fault_trapno(int sig, int code, void __user *addr, int trapno);
 int send_sig_fault_trapno(int sig, int code, void __user *addr, int trapno,
 			struct task_struct *t);
+int force_sig_seccomp(int syscall, int reason, bool force_coredump);
 
 extern int send_sig_info(int, struct kernel_siginfo *, struct task_struct *);
 extern void force_sigsegv(int sig);
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index 69c9a70..2b47584 100644
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -1158,7 +1158,6 @@ asmlinkage long sys_ustat(unsigned dev, struct ustat __user *ubuf);
 asmlinkage long sys_vfork(void);
 asmlinkage long sys_recv(int, void __user *, size_t, unsigned);
 asmlinkage long sys_send(int, void __user *, size_t, unsigned);
-asmlinkage long sys_bdflush(int func, long data);
 asmlinkage long sys_oldumount(char __user *name);
 asmlinkage long sys_uselib(const char __user *library);
 asmlinkage long sys_sysfs(int option,
diff --git a/include/uapi/linux/capability.h b/include/uapi/linux/capability.h
index 2ddb422..463d1ba 100644
--- a/include/uapi/linux/capability.h
+++ b/include/uapi/linux/capability.h
@@ -243,7 +243,6 @@ struct vfs_ns_cap_data {
 /* Allow examination and configuration of disk quotas */
 /* Allow setting the domainname */
 /* Allow setting the hostname */
-/* Allow calling bdflush() */
 /* Allow mount() and umount(), setting up new smb connection */
 /* Allow some autofs root ioctls */
 /* Allow nfsservctl */
diff --git a/kernel/seccomp.c b/kernel/seccomp.c
index 6469eca..4d8f44a 100644
--- a/kernel/seccomp.c
+++ b/kernel/seccomp.c
@@ -922,30 +922,6 @@ void get_seccomp_filter(struct task_struct *tsk)
 	refcount_inc(&orig->users);
 }
 
-static void seccomp_init_siginfo(kernel_siginfo_t *info, int syscall, int reason)
-{
-	clear_siginfo(info);
-	info->si_signo = SIGSYS;
-	info->si_code = SYS_SECCOMP;
-	info->si_call_addr = (void __user *)KSTK_EIP(current);
-	info->si_errno = reason;
-	info->si_arch = syscall_get_arch(current);
-	info->si_syscall = syscall;
-}
-
-/**
- * seccomp_send_sigsys - signals the task to allow in-process syscall emulation
- * @syscall: syscall number to send to userland
- * @reason: filter-supplied reason code to send to userland (via si_errno)
- *
- * Forces a SIGSYS with a code of SYS_SECCOMP and related sigsys info.
- */
-static void seccomp_send_sigsys(int syscall, int reason)
-{
-	struct kernel_siginfo info;
-	seccomp_init_siginfo(&info, syscall, reason);
-	force_sig_info(&info);
-}
 #endif	/* CONFIG_SECCOMP_FILTER */
 
 /* For use with seccomp_actions_logged */
@@ -1218,7 +1194,7 @@ static int __seccomp_filter(int this_syscall, const struct seccomp_data *sd,
 		/* Show the handler the original registers. */
 		syscall_rollback(current, current_pt_regs());
 		/* Let the filter pass back 16 bits of data. */
-		seccomp_send_sigsys(this_syscall, data);
+		force_sig_seccomp(this_syscall, data, false);
 		goto skip;
 
 	case SECCOMP_RET_TRACE:
@@ -1288,19 +1264,15 @@ static int __seccomp_filter(int this_syscall, const struct seccomp_data *sd,
 		seccomp_log(this_syscall, SIGSYS, action, true);
 		/* Dump core only if this is the last remaining thread. */
 		if (action != SECCOMP_RET_KILL_THREAD ||
-		    get_nr_threads(current) == 1) {
-			kernel_siginfo_t info;
-
+		    (atomic_read(&current->signal->live) == 1)) {
 			/* Show the original registers in the dump. */
 			syscall_rollback(current, current_pt_regs());
-			/* Trigger a manual coredump since do_exit skips it. */
-			seccomp_init_siginfo(&info, this_syscall, data);
-			do_coredump(&info);
-		}
-		if (action == SECCOMP_RET_KILL_THREAD)
+			/* Trigger a coredump with SIGSYS */
+			force_sig_seccomp(this_syscall, data, true);
+		} else {
 			do_exit(SIGSYS);
-		else
-			do_group_exit(SIGSYS);
+		}
+		return -1; /* skip the syscall go directly to signal handling */
 	}
 
 	unreachable();
diff --git a/kernel/signal.c b/kernel/signal.c
index 65a5411..cf7e250 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -54,6 +54,7 @@
 #include <asm/unistd.h>
 #include <asm/siginfo.h>
 #include <asm/cacheflush.h>
+#include <asm/syscall.h>	/* for syscall_get_* */
 
 /*
  * SLAB caches for signal bits.
@@ -1322,7 +1323,7 @@ int do_send_sig_info(int sig, struct kernel_siginfo *info, struct task_struct *p
  * that is why we also clear SIGNAL_UNKILLABLE.
  */
 static int
-force_sig_info_to_task(struct kernel_siginfo *info, struct task_struct *t)
+force_sig_info_to_task(struct kernel_siginfo *info, struct task_struct *t, bool sigdfl)
 {
 	unsigned long int flags;
 	int ret, blocked, ignored;
@@ -1333,7 +1334,7 @@ force_sig_info_to_task(struct kernel_siginfo *info, struct task_struct *t)
 	action = &t->sighand->action[sig-1];
 	ignored = action->sa.sa_handler == SIG_IGN;
 	blocked = sigismember(&t->blocked, sig);
-	if (blocked || ignored) {
+	if (blocked || ignored || sigdfl) {
 		action->sa.sa_handler = SIG_DFL;
 		if (blocked) {
 			sigdelset(&t->blocked, sig);
@@ -1354,7 +1355,7 @@ force_sig_info_to_task(struct kernel_siginfo *info, struct task_struct *t)
 
 int force_sig_info(struct kernel_siginfo *info)
 {
-	return force_sig_info_to_task(info, current);
+	return force_sig_info_to_task(info, current, false);
 }
 
 /*
@@ -1696,7 +1697,7 @@ int force_sig_fault_to_task(int sig, int code, void __user *addr
 	info.si_flags = flags;
 	info.si_isr = isr;
 #endif
-	return force_sig_info_to_task(&info, t);
+	return force_sig_info_to_task(&info, t, false);
 }
 
 int force_sig_fault(int sig, int code, void __user *addr
@@ -1798,6 +1799,27 @@ int force_sig_perf(void __user *addr, u32 type, u64 sig_data)
 	return force_sig_info(&info);
 }
 
+/**
+ * force_sig_seccomp - signals the task to allow in-process syscall emulation
+ * @syscall: syscall number to send to userland
+ * @reason: filter-supplied reason code to send to userland (via si_errno)
+ *
+ * Forces a SIGSYS with a code of SYS_SECCOMP and related sigsys info.
+ */
+int force_sig_seccomp(int syscall, int reason, bool force_coredump)
+{
+	struct kernel_siginfo info;
+
+	clear_siginfo(&info);
+	info.si_signo = SIGSYS;
+	info.si_code = SYS_SECCOMP;
+	info.si_call_addr = (void __user *)KSTK_EIP(current);
+	info.si_errno = reason;
+	info.si_arch = syscall_get_arch(current);
+	info.si_syscall = syscall;
+	return force_sig_info_to_task(&info, current, force_coredump);
+}
+
 /* For the crazy architectures that include trap information in
  * the errno field, instead of an actual errno value.
  */
diff --git a/kernel/sys_ni.c b/kernel/sys_ni.c
index 30971b1..cb6f98f 100644
--- a/kernel/sys_ni.c
+++ b/kernel/sys_ni.c
@@ -416,7 +416,6 @@ COND_SYSCALL(epoll_wait);
 COND_SYSCALL(recv);
 COND_SYSCALL_COMPAT(recv);
 COND_SYSCALL(send);
-COND_SYSCALL(bdflush);
 COND_SYSCALL(uselib);
 
 /* optional: time32 */
diff --git a/tools/perf/arch/powerpc/entry/syscalls/syscall.tbl b/tools/perf/arch/powerpc/entry/syscalls/syscall.tbl
index aef2a29..6f3953f 100644
--- a/tools/perf/arch/powerpc/entry/syscalls/syscall.tbl
+++ b/tools/perf/arch/powerpc/entry/syscalls/syscall.tbl
@@ -176,7 +176,7 @@
 131	nospu	quotactl			sys_quotactl
 132	common	getpgid				sys_getpgid
 133	common	fchdir				sys_fchdir
-134	common	bdflush				sys_bdflush
+134	common	bdflush				sys_ni_syscall
 135	common	sysfs				sys_sysfs
 136	32	personality			sys_personality			ppc64_personality
 136	64	personality			ppc64_personality
diff --git a/tools/perf/arch/s390/entry/syscalls/syscall.tbl b/tools/perf/arch/s390/entry/syscalls/syscall.tbl
index 64d51ab..8d619ec 100644
--- a/tools/perf/arch/s390/entry/syscalls/syscall.tbl
+++ b/tools/perf/arch/s390/entry/syscalls/syscall.tbl
@@ -122,7 +122,7 @@
 131  common	quotactl		sys_quotactl			sys_quotactl
 132  common	getpgid			sys_getpgid			sys_getpgid
 133  common	fchdir			sys_fchdir			sys_fchdir
-134  common	bdflush			sys_bdflush			sys_bdflush
+134  common	bdflush			-				-
 135  common	sysfs			sys_sysfs			sys_sysfs
 136  common	personality		sys_s390_personality		sys_s390_personality
 137  common	afs_syscall		-				-