This is a note to let you know that I've just added the patch titled
powerpc/ptdump: Fix display of RW pages on FSL_BOOK3E
to the 5.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
powerpc-ptdump-fix-display-of-rw-pages-on-fsl_book3e.patch
and it can be found in the queue-5.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 025ddb197f7de58ae9c168a668e11e460880a24f
Author: Christophe Leroy <christophe.leroy@xxxxxxxxxx>
Date: Tue Jun 28 16:43:35 2022 +0200
powerpc/ptdump: Fix display of RW pages on FSL_BOOK3E
[ Upstream commit dd8de84b57b02ba9c1fe530a6d916c0853f136bd ]
On FSL_BOOK3E, _PAGE_RW is defined with two bits, one for user and one
for supervisor. As soon as one of the two bits is set, the page has
to be display as RW. But the way it is implemented today requires both
bits to be set in order to display it as RW.
Instead of display RW when _PAGE_RW bits are set and R otherwise,
reverse the logic and display R when _PAGE_RW bits are all 0 and
RW otherwise.
This change has no impact on other platforms as _PAGE_RW is a single
bit on all of them.
Fixes: 8eb07b187000 ("powerpc/mm: Dump linux pagetables")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Christophe Leroy <christophe.leroy@xxxxxxxxxx>
Signed-off-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/0c33b96317811edf691e81698aaee8fa45ec3449.1656427391.git.christophe.leroy@xxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/arch/powerpc/mm/ptdump/shared.c b/arch/powerpc/mm/ptdump/shared.c
index 03607ab90c66..f884760ca5cf 100644
--- a/arch/powerpc/mm/ptdump/shared.c
+++ b/arch/powerpc/mm/ptdump/shared.c
@@ -17,9 +17,9 @@ static const struct flag_info flag_array[] = {
.clear = " ",
}, {
.mask = _PAGE_RW,
- .val = _PAGE_RW,
- .set = "rw",
- .clear = "r ",
+ .val = 0,
+ .set = "r ",
+ .clear = "rw",
}, {
.mask = _PAGE_EXEC,
.val = _PAGE_EXEC,
