sh: Check oops_may_print() in unhandled fault.

Only print out pgd/pte data in the oops path if oops_may_print()
holds true. Follows the i386 implementation.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 29 insertions, 16 deletions

diff --git a/arch/sh/mm/fault.c b/arch/sh/mm/fault.c
index c878faa4ae46..0b3eaf6fbb28 100644
--- a/arch/sh/mm/fault.c
+++ b/arch/sh/mm/fault.c
@@ -32,7 +32,6 @@ asmlinkage void __kprobes do_page_fault(struct pt_regs *regs,
         struct task_struct *tsk;
         struct mm_struct *mm;
         struct vm_area_struct * vma;
-        unsigned long page;
         int si_code;
         siginfo_t info;
 
@@ -170,24 +169,38 @@ no_context:
  * terminate things with extreme prejudice.
  *
  */
-        if (address < PAGE_SIZE)
-                printk(KERN_ALERT "Unable to handle kernel NULL pointer dereference");
-        else
-                printk(KERN_ALERT "Unable to handle kernel paging request");
-        printk(" at virtual address %08lx\n", address);
-        printk(KERN_ALERT "pc = %08lx\n", regs->pc);
-        page = (unsigned long)get_TTB();
-        if (page) {
-                page = ((unsigned long *) page)[address >> PGDIR_SHIFT];
-                printk(KERN_ALERT "*pde = %08lx\n", page);
-                if (page & _PAGE_PRESENT) {
-                        page &= PAGE_MASK;
-                        address &= 0x003ff000;
-                        page = ((unsigned long *) __va(page))[address >> PAGE_SHIFT];
-                        printk(KERN_ALERT "*pte = %08lx\n", page);
+
+        bust_spinlocks(1);
+
+        if (oops_may_print()) {
+                __typeof__(pte_val(__pte(0))) page;
+
+                if (address < PAGE_SIZE)
+                        printk(KERN_ALERT "Unable to handle kernel NULL "
+                                          "pointer dereference");
+                else
+                        printk(KERN_ALERT "Unable to handle kernel paging "
+                                          "request");
+                printk(" at virtual address %08lx\n", address);
+                printk(KERN_ALERT "pc = %08lx\n", regs->pc);
+                page = (unsigned long)get_TTB();
+                if (page) {
+                        page = ((__typeof__(page) *) __va(page))[address >>
+                                                                 PGDIR_SHIFT];
+                        printk(KERN_ALERT "*pde = %08lx\n", page);
+                        if (page & _PAGE_PRESENT) {
+                                page &= PAGE_MASK;
+                                address &= 0x003ff000;
+                                page = ((__typeof__(page) *)
+                                                __va(page))[address >>
+                                                            PAGE_SHIFT];
+                                printk(KERN_ALERT "*pte = %08lx\n", page);
+                        }
                 }
         }
+
         die("Oops", regs, writeaccess);
+        bust_spinlocks(0);
         do_exit(SIGKILL);
 
 /*