Merge tag 'xtensa-20260422' of https://github.com/jcmvbkbc/linux-xtensa

Pull Xtensa updates from Max Filippov:

 - use register_sys_off_handler(SYS_OFF_MODE_RESTART) instead of
   the deprecated register_restart_handler()

 - drop custom ucontext.h and reuse asm-generic ucontext.h

* tag 'xtensa-20260422' of https://github.com/jcmvbkbc/linux-xtensa:
  xtensa: uapi: Reuse asm-generic ucontext.h
  xtensa: xtfpga: Use register_sys_off_handler(SYS_OFF_MODE_RESTART)
  xtensa: xt2000: Use register_sys_off_handler(SYS_OFF_MODE_RESTART)
  xtensa: ISS: Use register_sys_off_handler(SYS_OFF_MODE_RESTART)

Author: torvalds

arch/xtensa/include/asm/ucontext.h

@@ -1,2 +1,3 @@
 # SPDX-License-Identifier: GPL-2.0
 generated-y += unistd_32.h
+generic-y += ucontext.h

arch/xtensa/include/uapi/asm/Kbuild

@@ -32,8 +32,7 @@ static int iss_power_off(struct sys_off_data *unused)
 	return NOTIFY_DONE;
 }
 
-static int iss_restart(struct notifier_block *this,
-		       unsigned long event, void *ptr)
+static int iss_restart(struct sys_off_data *unused)
 {
 	/* Flush and reset the mmu, simulate a processor reset, and
 	 * jump to the reset vector. */
@@ -42,10 +41,6 @@ static int iss_restart(struct notifier_block *this,
 	return NOTIFY_DONE;
 }
 
-static struct notifier_block iss_restart_block = {
-	.notifier_call = iss_restart,
-};
-
 static int
 iss_panic_event(struct notifier_block *this, unsigned long event, void *ptr)
 {
@@ -84,7 +79,9 @@ void __init platform_setup(char **p_cmdline)
 	}
 
 	atomic_notifier_chain_register(&panic_notifier_list, &iss_panic_block);
-	register_restart_handler(&iss_restart_block);
+	register_sys_off_handler(SYS_OFF_MODE_RESTART,
+				 SYS_OFF_PRIO_PLATFORM,
+				 iss_restart, NULL);
 	register_sys_off_handler(SYS_OFF_MODE_POWER_OFF,
 				 SYS_OFF_PRIO_PLATFORM,
 				 iss_power_off, NULL);

arch/xtensa/platforms/iss/setup.c

@@ -50,8 +50,7 @@ static int xt2000_power_off(struct sys_off_data *unused)
 	return NOTIFY_DONE;
 }
 
-static int xt2000_restart(struct notifier_block *this,
-			  unsigned long event, void *ptr)
+static int xt2000_restart(struct sys_off_data *unused)
 {
 	/* Flush and reset the mmu, simulate a processor reset, and
 	 * jump to the reset vector. */
@@ -60,10 +59,6 @@ static int xt2000_restart(struct notifier_block *this,
 	return NOTIFY_DONE;
 }
 
-static struct notifier_block xt2000_restart_block = {
-	.notifier_call = xt2000_restart,
-};
-
 void __init platform_setup(char** cmdline)
 {
 	led_print (0, "LINUX   ");
@@ -140,7 +135,9 @@ static int __init xt2000_setup_devinit(void)
 	platform_device_register(&xt2000_serial8250_device);
 	platform_device_register(&xt2000_sonic_device);
 	mod_timer(&heartbeat_timer, jiffies + HZ / 2);
-	register_restart_handler(&xt2000_restart_block);
+	register_sys_off_handler(SYS_OFF_MODE_RESTART,
+				 SYS_OFF_PRIO_PLATFORM,
+				 xt2000_restart, NULL);
 	register_sys_off_handler(SYS_OFF_MODE_POWER_OFF,
 				 SYS_OFF_PRIO_DEFAULT,
 				 xt2000_power_off, NULL);

arch/xtensa/platforms/xt2000/setup.c

@@ -42,8 +42,7 @@ static int xtfpga_power_off(struct sys_off_data *unused)
 	return NOTIFY_DONE;
 }
 
-static int xtfpga_restart(struct notifier_block *this,
-			  unsigned long event, void *ptr)
+static int xtfpga_restart(struct sys_off_data *unused)
 {
 	/* Try software reset first. */
 	WRITE_ONCE(*(u32 *)XTFPGA_SWRST_VADDR, 0xdead);
@@ -56,10 +55,6 @@ static int xtfpga_restart(struct notifier_block *this,
 	return NOTIFY_DONE;
 }
 
-static struct notifier_block xtfpga_restart_block = {
-	.notifier_call = xtfpga_restart,
-};
-
 #ifdef CONFIG_XTENSA_CALIBRATE_CCOUNT
 
 void __init platform_calibrate_ccount(void)
@@ -71,7 +66,9 @@ void __init platform_calibrate_ccount(void)
 
 static void __init xtfpga_register_handlers(void)
 {
-	register_restart_handler(&xtfpga_restart_block);
+	register_sys_off_handler(SYS_OFF_MODE_RESTART,
+				 SYS_OFF_PRIO_PLATFORM,
+				 xtfpga_restart, NULL);
 	register_sys_off_handler(SYS_OFF_MODE_POWER_OFF,
 				 SYS_OFF_PRIO_DEFAULT,
 				 xtfpga_power_off, NULL);