powerpc/mm/book3s-64: Clean up some obsolete or misleading comments

No code changes.

Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

1 files changed, 5 insertions, 5 deletions

diff --git a/arch/powerpc/mm/hash_utils_64.c b/arch/powerpc/mm/hash_utils_64.c
index ba59d5977f34..47a0bc12cb65 100644
--- a/arch/powerpc/mm/hash_utils_64.c
+++ b/arch/powerpc/mm/hash_utils_64.c
@@ -168,11 +168,11 @@ unsigned long htab_convert_pte_flags(unsigned long pteflags)
                 rflags |= HPTE_R_N;
         /*
          * PP bits:
-         * Linux use slb key 0 for kernel and 1 for user.
-         * kernel areas are mapped by PP bits 00
-         * and and there is no kernel RO (_PAGE_KERNEL_RO).
-         * User area mapped by 0x2 and read only use by
-         * 0x3.
+         * Linux uses slb key 0 for kernel and 1 for user.
+         * kernel areas are mapped with PP=00
+         * and there is no kernel RO (_PAGE_KERNEL_RO).
+         * User area is mapped with PP=0x2 for read/write
+         * or PP=0x3 for read-only (including writeable but clean pages).
          */
         if (pteflags & _PAGE_USER) {
                 rflags |= 0x2;