x86: constify data in reboot.c

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

diff --git a/arch/x86/kernel/reboot.c b/arch/x86/kernel/reboot.c
index f6be7d5f82f81d726bf3545732c1d78ad778b0f3..f8a62160e1513221a379a400cfd30dc6e3eaaf0b 100644 (file)
--- a/arch/x86/kernel/reboot.c
+++ b/arch/x86/kernel/reboot.c
@@ -27,7 +27,7 @@
 void (*pm_power_off)(void);
 EXPORT_SYMBOL(pm_power_off);
 
-static long no_idt[3];
+static const struct desc_ptr no_idt = {};
 static int reboot_mode;
 enum reboot_type reboot_type = BOOT_KBD;
 int reboot_force;
@@ -201,15 +201,15 @@ core_initcall(reboot_init);
    controller to pulse the CPU reset line, which is more thorough, but
    doesn't work with at least one type of 486 motherboard.  It is easy
    to stop this code working; hence the copious comments. */
-static unsigned long long
+static const unsigned long long
 real_mode_gdt_entries [3] =
 {
        0x0000000000000000ULL,  /* Null descriptor */
-       0x00009a000000ffffULL,  /* 16-bit real-mode 64k code at 0x00000000 */
-       0x000092000100ffffULL   /* 16-bit real-mode 64k data at 0x00000100 */
+       0x00009b000000ffffULL,  /* 16-bit real-mode 64k code at 0x00000000 */
+       0x000093000100ffffULL   /* 16-bit real-mode 64k data at 0x00000100 */
 };
 
-static struct desc_ptr
+static const struct desc_ptr
 real_mode_gdt = { sizeof (real_mode_gdt_entries) - 1, (long)real_mode_gdt_entries },
 real_mode_idt = { 0x3ff, 0 };
 
@@ -231,7 +231,7 @@ real_mode_idt = { 0x3ff, 0 };
 
    More could be done here to set up the registers as if a CPU reset had
    occurred; hopefully real BIOSs don't assume much. */
-static unsigned char real_mode_switch [] =
+static const unsigned char real_mode_switch [] =
 {
        0x66, 0x0f, 0x20, 0xc0,                 /*    movl  %cr0,%eax        */
        0x66, 0x83, 0xe0, 0x11,                 /*    andl  $0x00000011,%eax */
@@ -245,7 +245,7 @@ static unsigned char real_mode_switch [] =
        0x24, 0x10,                             /* f: andb  $0x10,al         */
        0x66, 0x0f, 0x22, 0xc0                  /*    movl  %eax,%cr0        */
 };
-static unsigned char jump_to_bios [] =
+static const unsigned char jump_to_bios [] =
 {
        0xea, 0x00, 0x00, 0xff, 0xff            /*    ljmp  $0xffff,$0x0000  */
 };
@@ -255,7 +255,7 @@ static unsigned char jump_to_bios [] =
  * specified by the code and length parameters.
  * We assume that length will aways be less that 100!
  */
-void machine_real_restart(unsigned char *code, int length)
+void machine_real_restart(const unsigned char *code, int length)
 {
        local_irq_disable();
 
@@ -368,7 +368,7 @@ static void native_machine_emergency_restart(void)
                        }
 
                case BOOT_TRIPLE:
-                       load_idt((const struct desc_ptr *)&no_idt);
+                       load_idt(&no_idt);
                        __asm__ __volatile__("int3");
 
                        reboot_type = BOOT_KBD;

diff --git a/arch/x86/kernel/reboot_fixups_32.c b/arch/x86/kernel/reboot_fixups_32.c
index dec0b5ec25c2fb18000af506d5493a623c40ad8a..61a837743fe5b7f91284bdfc97826ee802917132 100644 (file)
--- a/arch/x86/kernel/reboot_fixups_32.c
+++ b/arch/x86/kernel/reboot_fixups_32.c
@@ -49,7 +49,7 @@ struct device_fixup {
        void (*reboot_fixup)(struct pci_dev *);
 };
 
-static struct device_fixup fixups_table[] = {
+static const struct device_fixup fixups_table[] = {
 { PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_LEGACY, cs5530a_warm_reset },
 { PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_ISA, cs5536_warm_reset },
 { PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_SC1100_BRIDGE, cs5530a_warm_reset },
@@ -64,7 +64,7 @@ static struct device_fixup fixups_table[] = {
  */
 void mach_reboot_fixups(void)
 {
-       struct device_fixup *cur;
+       const struct device_fixup *cur;
        struct pci_dev *dev;
        int i;
 

diff --git a/include/asm-x86/reboot.h b/include/asm-x86/reboot.h
index e63741f19392e24d587b3383c18e6de2da1dab18..206f355786dc5651b11777305974b281bb7a4e9f 100644 (file)
--- a/include/asm-x86/reboot.h
+++ b/include/asm-x86/reboot.h
@@ -14,8 +14,8 @@ struct machine_ops {
 
 extern struct machine_ops machine_ops;
 
-void machine_real_restart(unsigned char *code, int length);
 void native_machine_crash_shutdown(struct pt_regs *regs);
 void native_machine_shutdown(void);
+void machine_real_restart(const unsigned char *code, int length);
 
 #endif /* _ASM_REBOOT_H */