Merge HEAD from ../scsi-iscsi-2.6

[pandora-kernel.git] / arch / x86_64 / mm / fault.c

diff --git a/arch/x86_64/mm/fault.c b/arch/x86_64/mm/fault.c
index 5d6b211..816732d 100644 (file)
--- a/arch/x86_64/mm/fault.c
+++ b/arch/x86_64/mm/fault.c
@@ -74,7 +74,7 @@ static noinline int is_prefetch(struct pt_regs *regs, unsigned long addr,
        instr = (unsigned char *)convert_rip_to_linear(current, regs);
        max_instr = instr + 15;
 
-       if ((regs->cs & 3) != 0 && instr >= (unsigned char *)TASK_SIZE)
+       if (user_mode(regs) && instr >= (unsigned char *)TASK_SIZE)
                return 0;
 
        while (scan_more && instr < max_instr) { 
@@ -106,7 +106,7 @@ static noinline int is_prefetch(struct pt_regs *regs, unsigned long addr,
                        /* Could check the LDT for lm, but for now it's good
                           enough to assume that long mode only uses well known
                           segments or kernel. */
-                       scan_more = ((regs->cs & 3) == 0) || (regs->cs == __USER_CS);
+                       scan_more = (!user_mode(regs)) || (regs->cs == __USER_CS);
                        break;
                        
                case 0x60:
@@ -212,9 +212,7 @@ int unhandled_signal(struct task_struct *tsk, int sig)
 {
        if (tsk->pid == 1)
                return 1;
-       /* Warn for strace, but not for gdb */
-       if (!test_ti_thread_flag(tsk->thread_info, TIF_SYSCALL_TRACE) &&
-           (tsk->ptrace & PT_PTRACED))
+       if (tsk->ptrace & PT_PTRACED)
                return 0;
        return (tsk->sighand->action[sig-1].sa.sa_handler == SIG_IGN) ||
                (tsk->sighand->action[sig-1].sa.sa_handler == SIG_DFL);
@@ -297,7 +295,8 @@ int exception_trace = 1;
  *     bit 2 == 0 means kernel, 1 means user-mode
  *      bit 3 == 1 means fault was an instruction fetch
  */
-asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long error_code)
+asmlinkage void __kprobes do_page_fault(struct pt_regs *regs,
+                                       unsigned long error_code)
 {
        struct task_struct *tsk;
        struct mm_struct *mm;
@@ -350,7 +349,7 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long error_code)
         * (error_code & 4) == 0, and that the fault was not a
         * protection error (error_code & 1) == 0.
         */
-       if (unlikely(address >= TASK_SIZE)) {
+       if (unlikely(address >= TASK_SIZE64)) {
                if (!(error_code & 5) &&
                      ((address >= VMALLOC_START && address < VMALLOC_END) ||
                       (address >= MODULES_VADDR && address < MODULES_END))) {
@@ -440,13 +439,13 @@ good_area:
         * the fault.
         */
        switch (handle_mm_fault(mm, vma, address, write)) {
-       case 1:
+       case VM_FAULT_MINOR:
                tsk->min_flt++;
                break;
-       case 2:
+       case VM_FAULT_MAJOR:
                tsk->maj_flt++;
                break;
-       case 0:
+       case VM_FAULT_SIGBUS:
                goto do_sigbus;
        default:
                goto out_of_memory;