1 files changed, 26 insertions, 14 deletions

diff --git a/arch/x86/kernel/reboot.c b/arch/x86/kernel/reboot.c
index f6be7d5f82f8..06a9f643817e 100644
--- 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;
@@ -177,6 +177,14 @@ static struct dmi_system_id __initdata reboot_dmi_table[] = {
                         DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 2400"),
                 },
         },
+        {       /* Handle problems with rebooting on Dell T5400's */
+                .callback = set_bios_reboot,
+                .ident = "Dell Precision T5400",
+                .matches = {
+                        DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+                        DMI_MATCH(DMI_PRODUCT_NAME, "Precision WorkStation T5400"),
+                },
+        },
         {       /* Handle problems with rebooting on HP laptops */
                 .callback = set_bios_reboot,
                 .ident = "HP Compaq Laptop",
@@ -201,15 +209,15 @@ 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 +239,7 @@ 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 +253,7 @@ 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 +263,7 @@ 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 +376,7 @@ 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;
@@ -403,24 +411,28 @@ void native_machine_shutdown(void)
 {
         /* Stop the cpus and apics */
 #ifdef CONFIG_SMP
-        int reboot_cpu_id;
 
         /* The boot cpu is always logical cpu 0 */
-        reboot_cpu_id = 0;
+        int reboot_cpu_id = 0;
+        cpumask_of_cpu_ptr(newmask, reboot_cpu_id);
 
 #ifdef CONFIG_X86_32
         /* See if there has been given a command line override */
         if ((reboot_cpu != -1) && (reboot_cpu < NR_CPUS) &&
-                cpu_online(reboot_cpu))
+                cpu_online(reboot_cpu)) {
                 reboot_cpu_id = reboot_cpu;
+                cpumask_of_cpu_ptr_next(newmask, reboot_cpu_id);
+        }
 #endif
 
         /* Make certain the cpu I'm about to reboot on is online */
-        if (!cpu_online(reboot_cpu_id))
+        if (!cpu_online(reboot_cpu_id)) {
                 reboot_cpu_id = smp_processor_id();
+                cpumask_of_cpu_ptr_next(newmask, reboot_cpu_id);
+        }
 
         /* Make certain I only run on the appropriate processor */
-        set_cpus_allowed_ptr(current, &cpumask_of_cpu(reboot_cpu_id));
+        set_cpus_allowed_ptr(current, newmask);
 
         /* O.K Now that I'm on the appropriate processor,
          * stop all of the others.