1 files changed, 20 insertions, 13 deletions
diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c
index 9b681f74dccc..31a763e05287 100644
--- a/arch/s390/mm/fault.c
+++ b/arch/s390/mm/fault.c
@@ -11,11 +11,11 @@
 
 #include <linux/kernel_stat.h>
 #include <linux/mmu_context.h>
+#include <linux/cpufeature.h>
 #include <linux/perf_event.h>
 #include <linux/signal.h>
 #include <linux/sched.h>
 #include <linux/sched/debug.h>
-#include <linux/jump_label.h>
 #include <linux/kernel.h>
 #include <linux/errno.h>
 #include <linux/string.h>
@@ -46,16 +46,6 @@
 #include <asm/uv.h>
 #include "../kernel/entry.h"
 
-static DEFINE_STATIC_KEY_FALSE(have_store_indication);
-
-static int __init fault_init(void)
-{
-	if (test_facility(75))
-		static_branch_enable(&have_store_indication);
-	return 0;
-}
-early_initcall(fault_init);
-
 /*
  * Find out which address space caused the exception.
  */
@@ -81,7 +71,7 @@ static __always_inline bool fault_is_write(struct pt_regs *regs)
 {
 	union teid teid = { .val = regs->int_parm_long };
 
-	if (static_branch_likely(&have_store_indication))
+	if (test_facility(75))
 		return teid.fsi == TEID_FSI_STORE;
 	return false;
 }
@@ -175,6 +165,23 @@ static void dump_fault_info(struct pt_regs *regs)
 
 int show_unhandled_signals = 1;
 
+static const struct ctl_table s390_fault_sysctl_table[] = {
+	{
+		.procname	= "userprocess_debug",
+		.data		= &show_unhandled_signals,
+		.maxlen		= sizeof(int),
+		.mode		= 0644,
+		.proc_handler	= proc_dointvec,
+	},
+};
+
+static int __init init_s390_fault_sysctls(void)
+{
+	register_sysctl_init("kernel", s390_fault_sysctl_table);
+	return 0;
+}
+arch_initcall(init_s390_fault_sysctls);
+
 void report_user_fault(struct pt_regs *regs, long signr, int is_mm_fault)
 {
 	static DEFINE_RATELIMIT_STATE(rs, DEFAULT_RATELIMIT_INTERVAL, DEFAULT_RATELIMIT_BURST);
@@ -377,7 +384,7 @@ void do_protection_exception(struct pt_regs *regs)
 		 */
 		return handle_fault_error_nolock(regs, 0);
 	}
-	if (unlikely(MACHINE_HAS_NX && teid.b56)) {
+	if (unlikely(cpu_has_nx() && teid.b56)) {
 		regs->int_parm_long = (teid.addr * PAGE_SIZE) | (regs->psw.addr & PAGE_MASK);
 		return handle_fault_error_nolock(regs, SEGV_ACCERR);
 	}