x86: add dump_pagetable helper to X86_32

Similar to x86 64-bit.

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 39 insertions, 33 deletions

diff --git a/arch/x86/mm/fault_32.c b/arch/x86/mm/fault_32.c
index 93ede2dde95..41c31968a74 100644
--- a/arch/x86/mm/fault_32.c
+++ b/arch/x86/mm/fault_32.c
@@ -173,6 +173,44 @@ static void force_sig_info_fault(int si_signo, int si_code,
         force_sig_info(si_signo, &info, tsk);
 }
 
+void dump_pagetable(unsigned long address)
+{
+        __typeof__(pte_val(__pte(0))) page;
+
+        page = read_cr3();
+        page = ((__typeof__(page) *) __va(page))[address >> PGDIR_SHIFT];
+#ifdef CONFIG_X86_PAE
+        printk("*pdpt = %016Lx ", page);
+        if ((page >> PAGE_SHIFT) < max_low_pfn
+            && page & _PAGE_PRESENT) {
+                page &= PAGE_MASK;
+                page = ((__typeof__(page) *) __va(page))[(address >> PMD_SHIFT)
+                                                         & (PTRS_PER_PMD - 1)];
+                printk(KERN_CONT "*pde = %016Lx ", page);
+                page &= ~_PAGE_NX;
+        }
+#else
+        printk("*pde = %08lx ", page);
+#endif
+
+        /*
+         * We must not directly access the pte in the highpte
+         * case if the page table is located in highmem.
+         * And let's rather not kmap-atomic the pte, just in case
+         * it's allocated already.
+         */
+        if ((page >> PAGE_SHIFT) < max_low_pfn
+            && (page & _PAGE_PRESENT)
+            && !(page & _PAGE_PSE)) {
+                page &= PAGE_MASK;
+                page = ((__typeof__(page) *) __va(page))[(address >> PAGE_SHIFT)
+                                                         & (PTRS_PER_PTE - 1)];
+                printk("*pte = %0*Lx ", sizeof(page)*2, (u64)page);
+        }
+
+        printk("\n");
+}
+
 void do_invalid_op(struct pt_regs *, unsigned long);
 
 static inline pmd_t *vmalloc_sync_one(pgd_t *pgd, unsigned long address)
@@ -572,7 +610,6 @@ no_context:
         bust_spinlocks(1);
 
         if (oops_may_print()) {
-                __typeof__(pte_val(__pte(0))) page;
 
 #ifdef CONFIG_X86_PAE
                 if (error_code & PF_INSTR) {
@@ -593,38 +630,7 @@ no_context:
                 printk(" at virtual address %08lx\n", address);
                 printk(KERN_ALERT "printing ip: %08lx ", regs->ip);
 
-                page = read_cr3();
-                page = ((__typeof__(page) *) __va(page))[address >> PGDIR_SHIFT];
-#ifdef CONFIG_X86_PAE
-                printk("*pdpt = %016Lx ", page);
-                if ((page >> PAGE_SHIFT) < max_low_pfn
-                    && page & _PAGE_PRESENT) {
-                        page &= PAGE_MASK;
-                        page = ((__typeof__(page) *) __va(page))[(address >> PMD_SHIFT)
-                                                                 & (PTRS_PER_PMD - 1)];
-                        printk(KERN_CONT "*pde = %016Lx ", page);
-                        page &= ~_PAGE_NX;
-                }
-#else
-                printk("*pde = %08lx ", page);
-#endif
-
-                /*
-                 * We must not directly access the pte in the highpte
-                 * case if the page table is located in highmem.
-                 * And let's rather not kmap-atomic the pte, just in case
-                 * it's allocated already.
-                 */
-                if ((page >> PAGE_SHIFT) < max_low_pfn
-                    && (page & _PAGE_PRESENT)
-                    && !(page & _PAGE_PSE)) {
-                        page &= PAGE_MASK;
-                        page = ((__typeof__(page) *) __va(page))[(address >> PAGE_SHIFT)
-                                                                 & (PTRS_PER_PTE - 1)];
-                        printk("*pte = %0*Lx ", sizeof(page)*2, (u64)page);
-                }
-
-                printk("\n");
+                dump_pagetable(address);
         }
 
         tsk->thread.cr2 = address;