[ARM] pass reboot command line to arch_reset()

OMAP wishes to pass state to the boot loader upon reboot in order to
instruct it whether to wait for USB-based reflashing or not.  There is
already a facility to do this via the reboot() syscall, except we ignore
the string passed to machine_restart().

This patch fixes things to pass this string to arch_reset().  This means
that we keep the reboot mode limited to telling the kernel _how_ to
perform the reboot which should be independent of what we request the
boot loader to do.

Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/include/asm/system.h

@@ -97,8 +97,8 @@ extern void __show_regs(struct pt_regs *);
 extern int cpu_architecture(void);
 extern void cpu_init(void);
 
-void arm_machine_restart(char mode);
-extern void (*arm_pm_restart)(char str);
+void arm_machine_restart(char mode, const char *cmd);
+extern void (*arm_pm_restart)(char str, const char *cmd);
 
 #define UDBG_UNDEFINED	(1 << 0)
 #define UDBG_SYSCALL	(1 << 1)

arch/arm/kernel/process.c

@@ -83,7 +83,7 @@ static int __init hlt_setup(char *__unused)
 __setup("nohlt", nohlt_setup);
 __setup("hlt", hlt_setup);
 
-void arm_machine_restart(char mode)
+void arm_machine_restart(char mode, const char *cmd)
 {
 	/*
 	 * Clean and disable cache, and turn off interrupts
@@ -100,7 +100,7 @@ void arm_machine_restart(char mode)
 	/*
 	 * Now call the architecture specific reboot code.
 	 */
-	arch_reset(mode);
+	arch_reset(mode, cmd);
 
 	/*
 	 * Whoops - the architecture was unable to reboot.
@@ -120,7 +120,7 @@ EXPORT_SYMBOL(pm_idle);
 void (*pm_power_off)(void);
 EXPORT_SYMBOL(pm_power_off);
 
-void (*arm_pm_restart)(char str) = arm_machine_restart;
+void (*arm_pm_restart)(char str, const char *cmd) = arm_machine_restart;
 EXPORT_SYMBOL_GPL(arm_pm_restart);
 
 
@@ -195,9 +195,9 @@ void machine_power_off(void)
 		pm_power_off();
 }
 
-void machine_restart(char * __unused)
+void machine_restart(char *cmd)
 {
-	arm_pm_restart(reboot_mode);
+	arm_pm_restart(reboot_mode, cmd);
 }
 
 void __show_regs(struct pt_regs *regs)

arch/arm/mach-aaec2000/include/mach/system.h

@@ -16,7 +16,7 @@ static inline void arch_idle(void)
 	cpu_do_idle();
 }
 
-static inline void arch_reset(char mode)
+static inline void arch_reset(char mode, const char *cmd)
 {
 	cpu_reset(0);
 }

arch/arm/mach-at91/include/mach/system.h

@@ -43,7 +43,7 @@ static inline void arch_idle(void)
 
 void (*at91_arch_reset)(void);
 
-static inline void arch_reset(char mode)
+static inline void arch_reset(char mode, const char *cmd)
 {
 	/* call the CPU-specific reset function */
 	if (at91_arch_reset)

arch/arm/mach-clps711x/include/mach/system.h

@@ -32,7 +32,7 @@ static inline void arch_idle(void)
 	mov	r0, r0");
 }
 
-static inline void arch_reset(char mode)
+static inline void arch_reset(char mode, const char *cmd)
 {
 	cpu_reset(0);
 }

arch/arm/mach-davinci/include/mach/system.h

@@ -21,7 +21,7 @@ static void arch_idle(void)
 	cpu_do_idle();
 }
 
-static void arch_reset(char mode)
+static void arch_reset(char mode, const char *cmd)
 {
 	davinci_watchdog_reset();
 }

arch/arm/mach-ebsa110/include/mach/system.h

@@ -34,6 +34,6 @@ static inline void arch_idle(void)
 	asm volatile ("mcr p15, 0, ip, c15, c1, 2" : : : "cc");
 }
 
-#define arch_reset(mode)	cpu_reset(0x80000000)
+#define arch_reset(mode, cmd)	cpu_reset(0x80000000)
 
 #endif

arch/arm/mach-ep93xx/include/mach/system.h

@@ -9,7 +9,7 @@ static inline void arch_idle(void)
 	cpu_do_idle();
 }
 
-static inline void arch_reset(char mode)
+static inline void arch_reset(char mode, const char *cmd)
 {
 	u32 devicecfg;
 

arch/arm/mach-footbridge/include/mach/system.h

@@ -18,7 +18,7 @@ static inline void arch_idle(void)
 	cpu_do_idle();
 }
 
-static inline void arch_reset(char mode)
+static inline void arch_reset(char mode, const char *cmd)
 {
 	if (mode == 's') {
 		/*

arch/arm/mach-h720x/include/mach/system.h

@@ -25,7 +25,7 @@ static void arch_idle(void)
 }
 
 
-static __inline__ void arch_reset(char mode)
+static __inline__ void arch_reset(char mode, const char *cmd)
 {
 	CPU_REG (PMU_BASE, PMU_STAT) |= PMU_WARMRESET;
 }

arch/arm/mach-imx/include/mach/system.h

@@ -32,7 +32,7 @@ arch_idle(void)
 }
 
 static inline void
-arch_reset(char mode)
+arch_reset(char mode, const char *cmd)
 {
 	cpu_reset(0);
 }

arch/arm/mach-integrator/include/mach/system.h

@@ -32,7 +32,7 @@ static inline void arch_idle(void)
 	cpu_do_idle();
 }
 
-static inline void arch_reset(char mode)
+static inline void arch_reset(char mode, const char *cmd)
 {
 	/*
 	 * To reset, we hit the on-board reset register

arch/arm/mach-iop13xx/include/mach/system.h

@@ -13,7 +13,7 @@ static inline void arch_idle(void)
 	cpu_do_idle();
 }
 
-static inline void arch_reset(char mode)
+static inline void arch_reset(char mode, const char *cmd)
 {
 	/*
 	 * Reset the internal bus (warning both cores are reset)

arch/arm/mach-iop32x/include/mach/system.h

@@ -16,7 +16,7 @@ static inline void arch_idle(void)
 	cpu_do_idle();
 }
 
-static inline void arch_reset(char mode)
+static inline void arch_reset(char mode, const char *cmd)
 {
 	local_irq_disable();
 

arch/arm/mach-iop33x/include/mach/system.h

@@ -14,7 +14,7 @@ static inline void arch_idle(void)
 	cpu_do_idle();
 }
 
-static inline void arch_reset(char mode)
+static inline void arch_reset(char mode, const char *cmd)
 {
 	*IOP3XX_PCSR = 0x30;
 

arch/arm/mach-ixp2000/include/mach/system.h

@@ -17,7 +17,7 @@ static inline void arch_idle(void)
 	cpu_do_idle();
 }
 
-static inline void arch_reset(char mode)
+static inline void arch_reset(char mode, const char *cmd)
 {
 	local_irq_disable();
 

arch/arm/mach-ixp23xx/include/mach/system.h

@@ -19,7 +19,7 @@ static inline void arch_idle(void)
 #endif
 }
 
-static inline void arch_reset(char mode)
+static inline void arch_reset(char mode, const char *cmd)
 {
 	/* First try machine specific support */
 	if (machine_is_ixdp2351()) {

arch/arm/mach-ixp4xx/include/mach/system.h

@@ -20,7 +20,7 @@ static inline void arch_idle(void)
 }
 
 
-static inline void arch_reset(char mode)
+static inline void arch_reset(char mode, const char *cmd)
 {
 	if ( 1 && mode == 's') {
 		/* Jump into ROM at address 0 */

arch/arm/mach-kirkwood/include/mach/system.h

@@ -17,7 +17,7 @@ static inline void arch_idle(void)
 	cpu_do_idle();
 }
 
-static inline void arch_reset(char mode)
+static inline void arch_reset(char mode, const char *cmd)
 {
 	/*
 	 * Enable soft reset to assert RSTOUTn.

arch/arm/mach-ks8695/include/mach/system.h

@@ -27,7 +27,7 @@ static void arch_idle(void)
 
 }
 
-static void arch_reset(char mode)
+static void arch_reset(char mode, const char *cmd)
 {
 	unsigned int reg;