Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6

[sfrench/cifs-2.6.git] / arch / sparc64 / mm / fault.c

diff --git a/arch/sparc64/mm/fault.c b/arch/sparc64/mm/fault.c
index c32e309f778832e572a215f6f6adc7aedc6831aa..e2027f27c0fe73f2f43546aa838577e86fc6e3ba 100644 (file)
--- a/arch/sparc64/mm/fault.c
+++ b/arch/sparc64/mm/fault.c
@@ -32,36 +32,23 @@
 #include <asm/mmu_context.h>
 
 #ifdef CONFIG_KPROBES
-ATOMIC_NOTIFIER_HEAD(notify_page_fault_chain);
-
-/* Hook to register for page fault notifications */
-int register_page_fault_notifier(struct notifier_block *nb)
-{
-       return atomic_notifier_chain_register(&notify_page_fault_chain, nb);
-}
-
-int unregister_page_fault_notifier(struct notifier_block *nb)
+static inline int notify_page_fault(struct pt_regs *regs)
 {
-       return atomic_notifier_chain_unregister(&notify_page_fault_chain, nb);
-}
-
-static inline int notify_page_fault(enum die_val val, const char *str,
-                       struct pt_regs *regs, long err, int trap, int sig)
-{
-       struct die_args args = {
-               .regs = regs,
-               .str = str,
-               .err = err,
-               .trapnr = trap,
-               .signr = sig
-       };
-       return atomic_notifier_call_chain(&notify_page_fault_chain, val, &args);
+       int ret = 0;
+
+       /* kprobe_running() needs smp_processor_id() */
+       if (!user_mode(regs)) {
+               preempt_disable();
+               if (kprobe_running() && kprobe_fault_handler(regs, 0))
+                       ret = 1;
+               preempt_enable();
+       }
+       return ret;
 }
 #else
-static inline int notify_page_fault(enum die_val val, const char *str,
-                       struct pt_regs *regs, long err, int trap, int sig)
+static inline int notify_page_fault(struct pt_regs *regs)
 {
-       return NOTIFY_DONE;
+       return 0;
 }
 #endif
 
@@ -120,23 +107,17 @@ static void __kprobes unhandled_fault(unsigned long address,
        printk(KERN_ALERT "tsk->{mm,active_mm}->pgd = %016lx\n",
               (tsk->mm ? (unsigned long) tsk->mm->pgd :
                          (unsigned long) tsk->active_mm->pgd));
-       if (notify_die(DIE_GPF, "general protection fault", regs,
-                      0, 0, SIGSEGV) == NOTIFY_STOP)
-               return;
        die_if_kernel("Oops", regs);
 }
 
 static void bad_kernel_pc(struct pt_regs *regs, unsigned long vaddr)
 {
-       unsigned long *ksp;
-
        printk(KERN_CRIT "OOPS: Bogus kernel PC [%016lx] in fault handler\n",
               regs->tpc);
        printk(KERN_CRIT "OOPS: RPC [%016lx]\n", regs->u_regs[15]);
        print_symbol("RPC: <%s>\n", regs->u_regs[15]);
        printk(KERN_CRIT "OOPS: Fault was to vaddr[%lx]\n", vaddr);
-       __asm__("mov %%sp, %0" : "=r" (ksp));
-       show_stack(current, ksp);
+       dump_stack();
        unhandled_fault(regs->tpc, current, regs);
 }
 
@@ -294,13 +275,12 @@ asmlinkage void __kprobes do_sparc64_fault(struct pt_regs *regs)
        struct mm_struct *mm = current->mm;
        struct vm_area_struct *vma;
        unsigned int insn = 0;
-       int si_code, fault_code;
+       int si_code, fault_code, fault;
        unsigned long address, mm_rss;
 
        fault_code = get_thread_fault_code();
 
-       if (notify_page_fault(DIE_PAGE_FAULT, "page_fault", regs,
-                      fault_code, 0, SIGSEGV) == NOTIFY_STOP)
+       if (notify_page_fault(regs))
                return;
 
        si_code = SEGV_MAPERR;
@@ -432,20 +412,18 @@ good_area:
                        goto bad_area;
        }
 
-       switch (handle_mm_fault(mm, vma, address, (fault_code & FAULT_CODE_WRITE))) {
-       case VM_FAULT_MINOR:
-               current->min_flt++;
-               break;
-       case VM_FAULT_MAJOR:
-               current->maj_flt++;
-               break;
-       case VM_FAULT_SIGBUS:
-               goto do_sigbus;
-       case VM_FAULT_OOM:
-               goto out_of_memory;
-       default:
+       fault = handle_mm_fault(mm, vma, address, (fault_code & FAULT_CODE_WRITE));
+       if (unlikely(fault & VM_FAULT_ERROR)) {
+               if (fault & VM_FAULT_OOM)
+                       goto out_of_memory;
+               else if (fault & VM_FAULT_SIGBUS)
+                       goto do_sigbus;
                BUG();
        }
+       if (fault & VM_FAULT_MAJOR)
+               current->maj_flt++;
+       else
+               current->min_flt++;
 
        up_read(&mm->mmap_sem);
 
@@ -485,7 +463,7 @@ out_of_memory:
        up_read(&mm->mmap_sem);
        printk("VM: killing process %s\n", current->comm);
        if (!(regs->tstate & TSTATE_PRIV))
-               do_exit(SIGKILL);
+               do_group_exit(SIGKILL);
        goto handle_kernel_fault;
 
 intr_or_no_mm: