6 files changed, 27 insertions, 25 deletions

diff --git a/arch/s390/kernel/audit.c b/arch/s390/kernel/audit.c
index d395c6c9944c..02051a596b87 100644
--- a/arch/s390/kernel/audit.c
+++ b/arch/s390/kernel/audit.c
@@ -47,15 +47,17 @@ int audit_classify_syscall(int abi, unsigned syscall)
 #endif
 	switch(syscall) {
 	case __NR_open:
-		return 2;
+		return AUDITSC_OPEN;
 	case __NR_openat:
-		return 3;
+		return AUDITSC_OPENAT;
 	case __NR_socketcall:
-		return 4;
+		return AUDITSC_SOCKETCALL;
 	case __NR_execve:
-		return 5;
+		return AUDITSC_EXECVE;
+	case __NR_openat2:
+		return AUDITSC_OPENAT2;
 	default:
-		return 0;
+		return AUDITSC_NATIVE;
 	}
 }
 
diff --git a/arch/s390/kernel/compat_audit.c b/arch/s390/kernel/compat_audit.c
index 444fb1f66944..a7c46e8310f0 100644
--- a/arch/s390/kernel/compat_audit.c
+++ b/arch/s390/kernel/compat_audit.c
@@ -1,5 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 #undef __s390x__
+#include <linux/audit_arch.h>
 #include <asm/unistd.h>
 #include "audit.h"
 
@@ -32,14 +33,16 @@ int s390_classify_syscall(unsigned syscall)
 {
 	switch(syscall) {
 	case __NR_open:
-		return 2;
+		return AUDITSC_OPEN;
 	case __NR_openat:
-		return 3;
+		return AUDITSC_OPENAT;
 	case __NR_socketcall:
-		return 4;
+		return AUDITSC_SOCKETCALL;
 	case __NR_execve:
-		return 5;
+		return AUDITSC_EXECVE;
+	case __NR_openat2:
+		return AUDITSC_OPENAT2;
 	default:
-		return 1;
+		return AUDITSC_COMPAT;
 	}
 }
diff --git a/arch/s390/kernel/ftrace.c b/arch/s390/kernel/ftrace.c
index 1d94ffdf347b..5165bf344f95 100644
--- a/arch/s390/kernel/ftrace.c
+++ b/arch/s390/kernel/ftrace.c
@@ -262,11 +262,6 @@ int ftrace_update_ftrace_func(ftrace_func_t func)
 	return 0;
 }
 
-int __init ftrace_dyn_arch_init(void)
-{
-	return 0;
-}
-
 void arch_ftrace_update_code(int command)
 {
 	if (ftrace_shared_hotpatch_trampoline(NULL))
diff --git a/arch/s390/kernel/kprobes.c b/arch/s390/kernel/kprobes.c
index 52d056a5f89f..c505c0ee5f47 100644
--- a/arch/s390/kernel/kprobes.c
+++ b/arch/s390/kernel/kprobes.c
@@ -7,6 +7,8 @@
  * s390 port, used ppc64 as template. Mike Grundy <grundym@us.ibm.com>
  */
 
+#define pr_fmt(fmt) "kprobes: " fmt
+
 #include <linux/moduleloader.h>
 #include <linux/kprobes.h>
 #include <linux/ptrace.h>
@@ -240,7 +242,7 @@ void arch_prepare_kretprobe(struct kretprobe_instance *ri, struct pt_regs *regs)
 	ri->fp = NULL;
 
 	/* Replace the return addr with trampoline addr */
-	regs->gprs[14] = (unsigned long) &kretprobe_trampoline;
+	regs->gprs[14] = (unsigned long) &__kretprobe_trampoline;
 }
 NOKPROBE_SYMBOL(arch_prepare_kretprobe);
 
@@ -259,7 +261,7 @@ static void kprobe_reenter_check(struct kprobe_ctlblk *kcb, struct kprobe *p)
 		 * is a BUG. The code path resides in the .kprobes.text
 		 * section and is executed with interrupts disabled.
 		 */
-		pr_err("Invalid kprobe detected.\n");
+		pr_err("Failed to recover from reentered kprobes.\n");
 		dump_kprobe(p);
 		BUG();
 	}
@@ -332,8 +334,8 @@ NOKPROBE_SYMBOL(kprobe_handler);
  */
 static void __used kretprobe_trampoline_holder(void)
 {
-	asm volatile(".global kretprobe_trampoline\n"
-		     "kretprobe_trampoline: bcr 0,0\n");
+	asm volatile(".global __kretprobe_trampoline\n"
+		     "__kretprobe_trampoline: bcr 0,0\n");
 }
 
 /*
@@ -341,7 +343,7 @@ static void __used kretprobe_trampoline_holder(void)
  */
 static int trampoline_probe_handler(struct kprobe *p, struct pt_regs *regs)
 {
-	regs->psw.addr = __kretprobe_trampoline_handler(regs, &kretprobe_trampoline, NULL);
+	regs->psw.addr = __kretprobe_trampoline_handler(regs, NULL);
 	/*
 	 * By returning a non-zero value, we are telling
 	 * kprobe_handler() that we don't want the post_handler
@@ -507,7 +509,7 @@ int kprobe_exceptions_notify(struct notifier_block *self,
 NOKPROBE_SYMBOL(kprobe_exceptions_notify);
 
 static struct kprobe trampoline = {
-	.addr = (kprobe_opcode_t *) &kretprobe_trampoline,
+	.addr = (kprobe_opcode_t *) &__kretprobe_trampoline,
 	.pre_handler = trampoline_probe_handler
 };
 
@@ -518,6 +520,6 @@ int __init arch_init_kprobes(void)
 
 int arch_trampoline_kprobe(struct kprobe *p)
 {
-	return p->addr == (kprobe_opcode_t *) &kretprobe_trampoline;
+	return p->addr == (kprobe_opcode_t *) &__kretprobe_trampoline;
 }
 NOKPROBE_SYMBOL(arch_trampoline_kprobe);
diff --git a/arch/s390/kernel/process.c b/arch/s390/kernel/process.c
index 350e94d0cac2..e5dd46b1bff8 100644
--- a/arch/s390/kernel/process.c
+++ b/arch/s390/kernel/process.c
@@ -181,12 +181,12 @@ void execve_tail(void)
 	asm volatile("sfpc %0" : : "d" (0));
 }
 
-unsigned long get_wchan(struct task_struct *p)
+unsigned long __get_wchan(struct task_struct *p)
 {
 	struct unwind_state state;
 	unsigned long ip = 0;
 
-	if (!p || p == current || task_is_running(p) || !task_stack_page(p))
+	if (!task_stack_page(p))
 		return 0;
 
 	if (!try_get_task_stack(p))
diff --git a/arch/s390/kernel/stacktrace.c b/arch/s390/kernel/stacktrace.c
index 101477b3e263..b7bb1981e9ee 100644
--- a/arch/s390/kernel/stacktrace.c
+++ b/arch/s390/kernel/stacktrace.c
@@ -46,7 +46,7 @@ int arch_stack_walk_reliable(stack_trace_consume_fn consume_entry,
 		 * Mark stacktraces with kretprobed functions on them
 		 * as unreliable.
 		 */
-		if (state.ip == (unsigned long)kretprobe_trampoline)
+		if (state.ip == (unsigned long)__kretprobe_trampoline)
 			return -EINVAL;
 #endif