Pull button into test branch

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

diff --git a/arch/mips/mm/fault.c b/arch/mips/mm/fault.c
index 2d9624f..6f90e7e 100644 (file)
--- a/arch/mips/mm/fault.c
+++ b/arch/mips/mm/fault.c
@@ -60,6 +60,10 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long write,
         */
        if (unlikely(address >= VMALLOC_START && address <= VMALLOC_END))
                goto vmalloc_fault;
+#ifdef MODULE_START
+       if (unlikely(address >= MODULE_START && address < MODULE_END))
+               goto vmalloc_fault;
+#endif
 
        /*
         * If we're in an interrupt or have no user
@@ -89,7 +93,7 @@ good_area:
                if (!(vma->vm_flags & VM_WRITE))
                        goto bad_area;
        } else {
-               if (!(vma->vm_flags & (VM_READ | VM_EXEC)))
+               if (!(vma->vm_flags & (VM_READ | VM_WRITE | VM_EXEC)))
                        goto bad_area;
        }
 
@@ -157,7 +161,6 @@ no_context:
         * Oops. The kernel tried to access some bad page. We'll have to
         * terminate things with extreme prejudice.
         */
-
        bust_spinlocks(1);
 
        printk(KERN_ALERT "CPU %d Unable to handle kernel paging request at "
@@ -172,7 +175,7 @@ no_context:
  */
 out_of_memory:
        up_read(&mm->mmap_sem);
-       if (tsk->pid == 1) {
+       if (is_init(tsk)) {
                yield();
                down_read(&mm->mmap_sem);
                goto survive;
@@ -188,11 +191,20 @@ do_sigbus:
        /* Kernel mode? Handle exceptions or die */
        if (!user_mode(regs))
                goto no_context;
-
+       else
        /*
         * Send a sigbus, regardless of whether we were in kernel
         * or user mode.
         */
+#if 0
+               printk("do_page_fault() #3: sending SIGBUS to %s for "
+                      "invalid %s\n%0*lx (epc == %0*lx, ra == %0*lx)\n",
+                      tsk->comm,
+                      write ? "write access to" : "read access from",
+                      field, address,
+                      field, (unsigned long) regs->cp0_epc,
+                      field, (unsigned long) regs->regs[31]);
+#endif
        tsk->thread.cp0_badvaddr = address;
        info.si_signo = SIGBUS;
        info.si_errno = 0;
@@ -201,7 +213,6 @@ do_sigbus:
        force_sig_info(SIGBUS, &info, tsk);
 
        return;
-
 vmalloc_fault:
        {
                /*