openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

sh: Fix unneeded constructor in page table allocation 

The pgd kmem_cache allocation both specified __GFP_ZERO and had a
constructor which makes no sense.  Remove __GFP_ZERO and zero the user
parts of the pgd explicitly.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Rich Felker <dalias@libc.org>
This commit is contained in:
Matthew Wilcox (Oracle) 2020-06-08 06:04:08 -07:00 committed by Rich Felker
parent bcf876870b
commit be74273aee
1 changed files with 3 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
arch/sh/mm/pgtable.c
View File

@ -2,8 +2,6 @@
#include <linux/mm.h>
#include <linux/slab.h>
#define PGALLOC_GFP GFP_KERNEL | __GFP_ZERO
static struct kmem_cache *pgd_cachep;
#if PAGETABLE_LEVELS > 2
static struct kmem_cache *pmd_cachep;
@ -13,6 +11,7 @@ void pgd_ctor(void *x)
{
pgd_t *pgd = x;
memset(pgd, 0, USER_PTRS_PER_PGD * sizeof(pgd_t));
memcpy(pgd + USER_PTRS_PER_PGD,
swapper_pg_dir + USER_PTRS_PER_PGD,
(PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
@ -32,7 +31,7 @@ void pgtable_cache_init(void)
pgd_t *pgd_alloc(struct mm_struct *mm)
{
return kmem_cache_alloc(pgd_cachep, PGALLOC_GFP);
return kmem_cache_alloc(pgd_cachep, GFP_KERNEL);
}
void pgd_free(struct mm_struct *mm, pgd_t *pgd)
@ -48,7 +47,7 @@ void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
{
return kmem_cache_alloc(pmd_cachep, PGALLOC_GFP);
return kmem_cache_alloc(pmd_cachep, GFP_KERNEL | __GFP_ZERO);
}
void pmd_free(struct mm_struct *mm, pmd_t *pmd)