1 files changed, 31 insertions, 14 deletions

diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h
index 3bfd5235a9e..76139506c3e 100644
--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@@ -16,6 +16,7 @@ struct mm_struct;
 #include <asm/cpufeature.h>
 #include <asm/system.h>
 #include <asm/page.h>
+#include <asm/pgtable_types.h>
 #include <asm/percpu.h>
 #include <asm/msr.h>
 #include <asm/desc_defs.h>
@@ -73,7 +74,7 @@ struct cpuinfo_x86 {
         char                    pad0;
 #else
         /* Number of 4K pages in DTLB/ITLB combined(in pages): */
-        int                      x86_tlbsize;
+        int                     x86_tlbsize;
         __u8                    x86_virt_bits;
         __u8                    x86_phys_bits;
 #endif
@@ -247,7 +248,6 @@ struct x86_hw_tss {
 #define IO_BITMAP_LONGS                 (IO_BITMAP_BYTES/sizeof(long))
 #define IO_BITMAP_OFFSET                offsetof(struct tss_struct, io_bitmap)
 #define INVALID_IO_BITMAP_OFFSET        0x8000
-#define INVALID_IO_BITMAP_OFFSET_LAZY   0x9000
 
 struct tss_struct {
         /*
@@ -262,11 +262,6 @@ struct tss_struct {
          * be within the limit.
          */
         unsigned long           io_bitmap[IO_BITMAP_LONGS + 1];
-        /*
-         * Cache the current maximum and the last task that used the bitmap:
-         */
-        unsigned long           io_bitmap_max;
-        struct thread_struct    *io_bitmap_owner;
 
         /*
          * .. and then another 0x100 bytes for the emergency kernel stack:
@@ -378,9 +373,30 @@ union thread_xstate {
 
 #ifdef CONFIG_X86_64
 DECLARE_PER_CPU(struct orig_ist, orig_ist);
+
+union irq_stack_union {
+        char irq_stack[IRQ_STACK_SIZE];
+        /*
+         * GCC hardcodes the stack canary as %gs:40.  Since the
+         * irq_stack is the object at %gs:0, we reserve the bottom
+         * 48 bytes of the irq stack for the canary.
+         */
+        struct {
+                char gs_base[40];
+                unsigned long stack_canary;
+        };
+};
+
+DECLARE_PER_CPU(union irq_stack_union, irq_stack_union);
+DECLARE_INIT_PER_CPU(irq_stack_union);
+
+DECLARE_PER_CPU(char *, irq_stack_ptr);
+#else   /* X86_64 */
+#ifdef CONFIG_CC_STACKPROTECTOR
+DECLARE_PER_CPU(unsigned long, stack_canary);
 #endif
+#endif  /* X86_64 */
 
-extern void print_cpu_info(struct cpuinfo_x86 *);
 extern unsigned int xstate_size;
 extern void free_thread_xstate(struct task_struct *);
 extern struct kmem_cache *task_xstate_cachep;
@@ -752,9 +768,9 @@ extern int sysenter_setup(void);
 extern struct desc_ptr          early_gdt_descr;
 
 extern void cpu_set_gdt(int);
-extern void switch_to_new_gdt(void);
+extern void switch_to_new_gdt(int);
+extern void load_percpu_segment(int);
 extern void cpu_init(void);
-extern void init_gdt(int cpu);
 
 static inline unsigned long get_debugctlmsr(void)
 {
@@ -839,6 +855,7 @@ static inline void spin_lock_prefetch(const void *x)
  * User space process size: 3GB (default).
  */
 #define TASK_SIZE               PAGE_OFFSET
+#define TASK_SIZE_MAX           TASK_SIZE
 #define STACK_TOP               TASK_SIZE
 #define STACK_TOP_MAX           STACK_TOP
 
@@ -898,7 +915,7 @@ extern unsigned long thread_saved_pc(struct task_struct *tsk);
 /*
  * User space process size. 47bits minus one guard page.
  */
-#define TASK_SIZE64     ((1UL << 47) - PAGE_SIZE)
+#define TASK_SIZE_MAX   ((1UL << 47) - PAGE_SIZE)
 
 /* This decides where the kernel will search for a free chunk of vm
  * space during mmap's.
@@ -907,12 +924,12 @@ extern unsigned long thread_saved_pc(struct task_struct *tsk);
                                         0xc0000000 : 0xFFFFe000)
 
 #define TASK_SIZE               (test_thread_flag(TIF_IA32) ? \
-                                        IA32_PAGE_OFFSET : TASK_SIZE64)
+                                        IA32_PAGE_OFFSET : TASK_SIZE_MAX)
 #define TASK_SIZE_OF(child)     ((test_tsk_thread_flag(child, TIF_IA32)) ? \
-                                        IA32_PAGE_OFFSET : TASK_SIZE64)
+                                        IA32_PAGE_OFFSET : TASK_SIZE_MAX)
 
 #define STACK_TOP               TASK_SIZE
-#define STACK_TOP_MAX           TASK_SIZE64
+#define STACK_TOP_MAX           TASK_SIZE_MAX
 
 #define INIT_THREAD  { \
         .sp0 = (unsigned long)&init_stack + sizeof(init_stack) \