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MIPS: check return value of pgtable_pmd_page_ctor

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[ Upstream commit 6aa32467299e9e12280a6aec9dbc21bf2db830b0 ]

+. According to Documentation/vm/split_page_table_lock, handle failure
of pgtable_pmd_page_ctor

+. Use GFP_KERNEL_ACCOUNT instead of GFP_KERNEL|__GFP_ACCOUNT

+. Adjust coding style

Fixes: ed914d48b6a1 ("MIPS: add PMD table accounting into MIPS')
Reported-by: Joshua Kinard <kumba@gentoo.org>
Signed-off-by: Huang Pei <huangpei@loongson.cn>
Reviewed-by: Joshua Kinard <kumba@gentoo.org>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Huang Pei 2021-07-21 17:30:45 +08:00 committed by AuxXxilium
parent 354fb88742
commit 71ec553ca5
1 changed files with 11 additions and 6 deletions
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17
arch/mips/include/asm/pgalloc.h
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@ -59,15 +59,20 @@ 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;
}