powerpc/mm: Fix missing page attributes in page table dump

On some targets, _PAGE_RW is 0 and this is _PAGE_RO which is used.
There is also _PAGE_SHARED that is missing.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

2 files changed, 10 insertions, 0 deletions

diff --git a/arch/powerpc/include/asm/book3s/64/pgtable.h b/arch/powerpc/include/asm/book3s/64/pgtable.h
index fb8380a2d8d5..85bc9875c3be 100644
--- a/arch/powerpc/include/asm/book3s/64/pgtable.h
+++ b/arch/powerpc/include/asm/book3s/64/pgtable.h
@@ -13,6 +13,7 @@
 #define _PAGE_BIT_SWAP_TYPE     0
 
 #define _PAGE_RO                0
+#define _PAGE_SHARED            0
 
 #define _PAGE_EXEC              0x00001 /* execute permission */
 #define _PAGE_WRITE             0x00002 /* write access allowed */
diff --git a/arch/powerpc/mm/dump_linuxpagetables.c b/arch/powerpc/mm/dump_linuxpagetables.c
index bb136ac6ac55..ec4906994726 100644
--- a/arch/powerpc/mm/dump_linuxpagetables.c
+++ b/arch/powerpc/mm/dump_linuxpagetables.c
@@ -121,8 +121,13 @@ static const struct flag_info flag_array[] = {
                 .set    = "user",
                 .clear  = "    ",
         }, {
+#if _PAGE_RO == 0
                 .mask   = _PAGE_RW,
                 .val    = _PAGE_RW,
+#else
+                .mask   = _PAGE_RO,
+                .val    = 0,
+#endif
                 .set    = "rw",
                 .clear  = "ro",
         }, {
@@ -222,6 +227,10 @@ static const struct flag_info flag_array[] = {
                 .mask   = _PAGE_SPECIAL,
                 .val    = _PAGE_SPECIAL,
                 .set    = "special",
+        }, {
+                .mask   = _PAGE_SHARED,
+                .val    = _PAGE_SHARED,
+                .set    = "shared",
         }
 };