The patch titled
Subject: powerpc/mm: fix size of allocated PGDIR
has been added to the -mm mm-hotfixes-unstable branch. Its filename is
powerpc-mm-fix-size-of-allocated-pgdir.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/powerpc-mm-fix-size-of-allocated-pgdir.patch
This patch will later appear in the mm-hotfixes-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Christophe Leroy <christophe.leroy@xxxxxxxxxx>
Subject: powerpc/mm: fix size of allocated PGDIR
Date: Thu, 8 Aug 2024 11:32:47 +0200
Commit 6b0e82791bd0 ("powerpc/e500: switch to 64 bits PGD on 85xx
(32 bits)") increased the size of PGD entries but failed to increase
the PGD directory.
Use the size of pgd_t instead of the size of pointers to calculate the
allocated size.
Link: https://lkml.kernel.org/r/1cdaacb391cbd3e0240f0e0faf691202874e9422.1723109462.git.christophe.leroy@xxxxxxxxxx
Fixes: 6b0e82791bd0 ("powerpc/e500: switch to 64 bits PGD on 85xx (32 bits)")
Signed-off-by: Christophe Leroy <christophe.leroy@xxxxxxxxxx>
Reported-by: Guenter Roeck <linux@xxxxxxxxxxxx>
Tested-by: Guenter Roeck <linux@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/powerpc/mm/init-common.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/arch/powerpc/mm/init-common.c~powerpc-mm-fix-size-of-allocated-pgdir
+++ a/arch/powerpc/mm/init-common.c
@@ -73,7 +73,7 @@ void setup_kup(void)
#define CTOR(shift) static void ctor_##shift(void *addr) \
{ \
- memset(addr, 0, sizeof(void *) << (shift)); \
+ memset(addr, 0, sizeof(pgd_t) << (shift)); \
}
CTOR(0); CTOR(1); CTOR(2); CTOR(3); CTOR(4); CTOR(5); CTOR(6); CTOR(7);
@@ -117,7 +117,7 @@ EXPORT_SYMBOL_GPL(pgtable_cache); /* use
void pgtable_cache_add(unsigned int shift)
{
char *name;
- unsigned long table_size = sizeof(void *) << shift;
+ unsigned long table_size = sizeof(pgd_t) << shift;
unsigned long align = table_size;
/* When batching pgtable pointers for RCU freeing, we store
_
Patches currently in -mm which might be from christophe.leroy@xxxxxxxxxx are
powerpc-mm-fix-size-of-allocated-pgdir.patch
