1 files changed, 20 insertions, 25 deletions

diff --git a/arch/x86_64/kernel/setup64.c b/arch/x86_64/kernel/setup64.c
index 417de564456e..8c4b80fe71a1 100644
--- a/arch/x86_64/kernel/setup64.c
+++ b/arch/x86_64/kernel/setup64.c
@@ -24,7 +24,7 @@
 #include <asm/proto.h>
 #include <asm/sections.h>
 
-char x86_boot_params[BOOT_PARAM_SIZE] __initdata = {0,};
+char x86_boot_params[BOOT_PARAM_SIZE] __initdata;
 
 cpumask_t cpu_initialized __cpuinitdata = CPU_MASK_NONE;
 
@@ -46,8 +46,10 @@ Control non executable mappings for 64bit processes.
 on      Enable(default)
 off     Disable
 */ 
-int __init nonx_setup(char *str)
+static int __init nonx_setup(char *str)
 {
+        if (!str)
+                return -EINVAL;
         if (!strncmp(str, "on", 2)) {
                 __supported_pte_mask |= _PAGE_NX; 
                 do_not_nx = 0; 
@@ -55,9 +57,9 @@ int __init nonx_setup(char *str)
                 do_not_nx = 1;
                 __supported_pte_mask &= ~_PAGE_NX;
         }
-        return 1;
+        return 0;
 } 
-__setup("noexec=", nonx_setup); /* parsed early actually */
+early_param("noexec", nonx_setup);
 
 int force_personality32 = 0; 
 
@@ -93,12 +95,9 @@ void __init setup_per_cpu_areas(void)
 #endif
 
         /* Copy section for each CPU (we discard the original) */
-        size = ALIGN(__per_cpu_end - __per_cpu_start, SMP_CACHE_BYTES);
-#ifdef CONFIG_MODULES
-        if (size < PERCPU_ENOUGH_ROOM)
-                size = PERCPU_ENOUGH_ROOM;
-#endif
+        size = PERCPU_ENOUGH_ROOM;
 
+        printk(KERN_INFO "PERCPU: Allocating %lu bytes of per cpu data\n", size);
         for_each_cpu_mask (i, cpu_possible_map) {
                 char *ptr;
 
@@ -122,7 +121,10 @@ void pda_init(int cpu)
 
         /* Setup up data that may be needed in __get_free_pages early */
         asm volatile("movl %0,%%fs ; movl %0,%%gs" :: "r" (0)); 
+        /* Memory clobbers used to order PDA accessed */
+        mb();
         wrmsrl(MSR_GS_BASE, pda);
+        mb();
 
         pda->cpunumber = cpu; 
         pda->irqcount = -1;
@@ -178,6 +180,8 @@ void __cpuinit check_efer(void)
         }       
 }
 
+unsigned long kernel_eflags;
+
 /*
  * cpu_init() initializes state that is per-CPU. Some data is already
  * initialized (naturally) in the bootstrap process, such as the GDT
@@ -235,28 +239,17 @@ void __cpuinit cpu_init (void)
          * set up and load the per-CPU TSS
          */
         for (v = 0; v < N_EXCEPTION_STACKS; v++) {
+                static const unsigned int order[N_EXCEPTION_STACKS] = {
+                        [0 ... N_EXCEPTION_STACKS - 1] = EXCEPTION_STACK_ORDER,
+                        [DEBUG_STACK - 1] = DEBUG_STACK_ORDER
+                };
                 if (cpu) {
-                        static const unsigned int order[N_EXCEPTION_STACKS] = {
-                                [0 ... N_EXCEPTION_STACKS - 1] = EXCEPTION_STACK_ORDER,
-                                [DEBUG_STACK - 1] = DEBUG_STACK_ORDER
-                        };
-
                         estacks = (char *)__get_free_pages(GFP_ATOMIC, order[v]);
                         if (!estacks)
                                 panic("Cannot allocate exception stack %ld %d\n",
                                       v, cpu); 
                 }
-                switch (v + 1) {
-#if DEBUG_STKSZ > EXCEPTION_STKSZ
-                case DEBUG_STACK:
-                        cpu_pda(cpu)->debugstack = (unsigned long)estacks;
-                        estacks += DEBUG_STKSZ;
-                        break;
-#endif
-                default:
-                        estacks += EXCEPTION_STKSZ;
-                        break;
-                }
+                estacks += PAGE_SIZE << order[v];
                 orig_ist->ist[v] = t->ist[v] = (unsigned long)estacks;
         }
 
@@ -290,4 +283,6 @@ void __cpuinit cpu_init (void)
         set_debugreg(0UL, 7);
 
         fpu_init(); 
+
+        raw_local_save_flags(kernel_eflags);
 }