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powerpc/ptdump: Fix display of RW pages on FSL_BOOK3E

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commit dd8de84b57 upstream.

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: 8eb07b1870 ("powerpc/mm: Dump linux pagetables")
Cc: stable@vger.kernel.org
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/0c33b96317811edf691e81698aaee8fa45ec3449.1656427391.git.christophe.leroy@csgroup.eu
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Christophe Leroy 2022-06-28 16:43:35 +02:00 • committed by Justin Hammond
parent 5e348e64c0
commit 0e4f08e9b1
1 changed files with 3 additions and 3 deletions
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6
arch/powerpc/mm/ptdump/shared.c
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@ -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,