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fix PMD accounting change

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Merge tag 'mips-fixes_5.14_1' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux

Pull MIPS fix from Thomas Bogendoerfer:
 "Fix PMD accounting change"

* tag 'mips-fixes_5.14_1' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux:
  MIPS: check return value of pgtable_pmd_page_ctor
This commit is contained in:
Linus Torvalds 2021-08-06 11:31:11 -07:00
commit cb407fc81d
1 changed files with 11 additions and 6 deletions
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17
arch/mips/include/asm/pgalloc.h
View file

@ -58,15 +58,20 @@ do { \
static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
{
pmd_t *pmd = NULL;
pmd_t *pmd;
struct page *pg;
pg = alloc_pages(GFP_KERNEL | __GFP_ACCOUNT, PMD_ORDER);
if (pg) {
pgtable_pmd_page_ctor(pg);
pmd = (pmd_t *)page_address(pg);
pmd_init((unsigned long)pmd, (unsigned long)invalid_pte_table);
pg = alloc_pages(GFP_KERNEL_ACCOUNT, PMD_ORDER);
if (!pg)
return NULL;
if (!pgtable_pmd_page_ctor(pg)) {
__free_pages(pg, PMD_ORDER);
return NULL;
}
pmd = (pmd_t *)page_address(pg);
pmd_init((unsigned long)pmd, (unsigned long)invalid_pte_table);
return pmd;
}