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MIPS: add PMD table accounting into MIPS'pmd_alloc_one

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[ Upstream commit ed914d48b6 ]

This fixes Page Table accounting bug.

MIPS is the ONLY arch just defining __HAVE_ARCH_PMD_ALLOC_ONE alone.
Since commit b2b29d6d01 (mm: account PMD tables like PTE tables),
"pmd_free" in asm-generic with PMD table accounting and "pmd_alloc_one"
in MIPS without PMD table accounting causes PageTable accounting number
negative, which read by global_zone_page_state(), always returns 0.

Signed-off-by: Huang Pei <huangpei@loongson.cn>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Huang Pei
2021-06-11 15:09:46 +08:00
committed by Greg Kroah-Hartman
parent e15cff87df
commit 002d8b395f
1 changed files with 7 additions and 3 deletions
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10
arch/mips/include/asm/pgalloc.h
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@@ -62,11 +62,15 @@ do { \
static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
{
pmd_t *pmd;
pmd_t *pmd = NULL;
struct page *pg;
pmd = (pmd_t *) __get_free_pages(GFP_KERNEL, PMD_ORDER);
if (pmd)
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);
}
return pmd;
}