xtensa: drop platform_restart

Instead of using xtensa-specific platform_restart callback use
do_kernel_restart in the machine_restart implementation and reimplement
existing platform_restart users with register_restart_handler.
Drop platform_restart declaration and default implementation.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>

1 files changed, 10 insertions, 2 deletions

diff --git a/arch/xtensa/platforms/iss/setup.c b/arch/xtensa/platforms/iss/setup.c
index d3433e1bb94e..a7009f223ef2 100644
--- a/arch/xtensa/platforms/iss/setup.c
+++ b/arch/xtensa/platforms/iss/setup.c
@@ -16,6 +16,7 @@
 #include <linux/notifier.h>
 #include <linux/panic_notifier.h>
 #include <linux/printk.h>
+#include <linux/reboot.h>
 #include <linux/string.h>
 
 #include <asm/platform.h>
@@ -36,14 +37,20 @@ void platform_power_off(void)
 	simc_exit(0);
 }
 
-void platform_restart(void)
+static int iss_restart(struct notifier_block *this,
+		       unsigned long event, void *ptr)
 {
 	/* Flush and reset the mmu, simulate a processor reset, and
 	 * jump to the reset vector. */
 	cpu_reset();
-	/* control never gets here */
+
+	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)
 {
@@ -82,4 +89,5 @@ void __init platform_setup(char **p_cmdline)
 	}
 
 	atomic_notifier_chain_register(&panic_notifier_list, &iss_panic_block);
+	register_restart_handler(&iss_restart_block);
 }