5 files changed, 43 insertions, 19 deletions

diff --git a/arch/m68k/kernel/entry.S b/arch/m68k/kernel/entry.S
index 97cd3ea5f10b..9dd76fbb7c6b 100644
--- a/arch/m68k/kernel/entry.S
+++ b/arch/m68k/kernel/entry.S
@@ -69,6 +69,13 @@ ENTRY(__sys_vfork)
 	lea     %sp@(24),%sp
 	rts
 
+ENTRY(__sys_clone3)
+	SAVE_SWITCH_STACK
+	pea	%sp@(SWITCH_STACK_SIZE)
+	jbsr	m68k_clone3
+	lea	%sp@(28),%sp
+	rts
+
 ENTRY(sys_sigreturn)
 	SAVE_SWITCH_STACK
 	movel	%sp,%sp@-		  | switch_stack pointer
diff --git a/arch/m68k/kernel/process.c b/arch/m68k/kernel/process.c
index 4e77a06735c1..8f0d9140700f 100644
--- a/arch/m68k/kernel/process.c
+++ b/arch/m68k/kernel/process.c
@@ -30,8 +30,9 @@
 #include <linux/init_task.h>
 #include <linux/mqueue.h>
 #include <linux/rcupdate.h>
-
+#include <linux/syscalls.h>
 #include <linux/uaccess.h>
+
 #include <asm/traps.h>
 #include <asm/machdep.h>
 #include <asm/setup.h>
@@ -107,20 +108,43 @@ void flush_thread(void)
  * on top of pt_regs, which means that sys_clone() arguments would be
  * buried.  We could, of course, copy them, but it's too costly for no
  * good reason - generic clone() would have to copy them *again* for
- * do_fork() anyway.  So in this case it's actually better to pass pt_regs *
- * and extract arguments for do_fork() from there.  Eventually we might
- * go for calling do_fork() directly from the wrapper, but only after we
- * are finished with do_fork() prototype conversion.
+ * _do_fork() anyway.  So in this case it's actually better to pass pt_regs *
+ * and extract arguments for _do_fork() from there.  Eventually we might
+ * go for calling _do_fork() directly from the wrapper, but only after we
+ * are finished with _do_fork() prototype conversion.
  */
 asmlinkage int m68k_clone(struct pt_regs *regs)
 {
 	/* regs will be equal to current_pt_regs() */
-	return do_fork(regs->d1, regs->d2, 0,
-		       (int __user *)regs->d3, (int __user *)regs->d4);
+	struct kernel_clone_args args = {
+		.flags		= regs->d1 & ~CSIGNAL,
+		.pidfd		= (int __user *)regs->d3,
+		.child_tid	= (int __user *)regs->d4,
+		.parent_tid	= (int __user *)regs->d3,
+		.exit_signal	= regs->d1 & CSIGNAL,
+		.stack		= regs->d2,
+		.tls		= regs->d5,
+	};
+
+	if (!legacy_clone_args_valid(&args))
+		return -EINVAL;
+
+	return _do_fork(&args);
+}
+
+/*
+ * Because extra registers are saved on the stack after the sys_clone3()
+ * arguments, this C wrapper extracts them from pt_regs * and then calls the
+ * generic sys_clone3() implementation.
+ */
+asmlinkage int m68k_clone3(struct pt_regs *regs)
+{
+	return sys_clone3((struct clone_args __user *)regs->d1, regs->d2);
 }
 
-int copy_thread(unsigned long clone_flags, unsigned long usp,
-		 unsigned long arg, struct task_struct *p)
+int copy_thread_tls(unsigned long clone_flags, unsigned long usp,
+		    unsigned long arg, struct task_struct *p,
+		    unsigned long tls)
 {
 	struct fork_frame {
 		struct switch_stack sw;
@@ -155,7 +179,7 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
 	p->thread.usp = usp ?: rdusp();
 
 	if (clone_flags & CLONE_SETTLS)
-		task_thread_info(p)->tp_value = frame->regs.d5;
+		task_thread_info(p)->tp_value = tls;
 
 #ifdef CONFIG_FPU
 	if (!FPU_IS_EMU) {
diff --git a/arch/m68k/kernel/setup_mm.c b/arch/m68k/kernel/setup_mm.c
index 528484feff80..ab8aa7be260f 100644
--- a/arch/m68k/kernel/setup_mm.c
+++ b/arch/m68k/kernel/setup_mm.c
@@ -274,10 +274,6 @@ void __init setup_arch(char **cmdline_p)
 
 	parse_early_param();
 
-#ifdef CONFIG_DUMMY_CONSOLE
-	conswitchp = &dummy_con;
-#endif
-
 	switch (m68k_machtype) {
 #ifdef CONFIG_AMIGA
 	case MACH_AMIGA:
diff --git a/arch/m68k/kernel/setup_no.c b/arch/m68k/kernel/setup_no.c
index 3c5def10d486..a63483de7a42 100644
--- a/arch/m68k/kernel/setup_no.c
+++ b/arch/m68k/kernel/setup_no.c
@@ -146,10 +146,6 @@ void __init setup_arch(char **cmdline_p)
 	memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
 	boot_command_line[COMMAND_LINE_SIZE-1] = 0;
 
-#if defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_DUMMY_CONSOLE)
-	conswitchp = &dummy_con;
-#endif
-
 	/*
 	 * Give all the memory to the bootmap allocator, tell it to put the
 	 * boot mem_map at the start of memory.
diff --git a/arch/m68k/kernel/syscalls/syscall.tbl b/arch/m68k/kernel/syscalls/syscall.tbl
index a88a285a0e5f..b911e0f50a71 100644
--- a/arch/m68k/kernel/syscalls/syscall.tbl
+++ b/arch/m68k/kernel/syscalls/syscall.tbl
@@ -434,4 +434,5 @@
 432	common	fsmount				sys_fsmount
 433	common	fspick				sys_fspick
 434	common	pidfd_open			sys_pidfd_open
-# 435 reserved for clone3
+435	common	clone3				__sys_clone3
+437	common	openat2				sys_openat2