[RFC PATCH 22/24] mm/hugetlb: Implement vmemmap_pmd_mkhuge macro
From: Muchun Song <hidden>
Date: 2020-09-16 00:40:50
Also in:
linux-fsdevel, linux-mm, lkml
Subsystem:
the rest, x86 architecture (32-bit and 64-bit) · Maintainers:
Linus Torvalds, Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen
In vmemmap_populate_hugepages(), we use PAGE_KERNEL_LARGE for huge page mapping. So we can inplement vmemmap_pmd_mkhuge macro to do that. Signed-off-by: Muchun Song <redacted> --- arch/x86/include/asm/hugetlb.h | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/arch/x86/include/asm/hugetlb.h b/arch/x86/include/asm/hugetlb.h
index 7c3eb60c2198..9f9e19dd0578 100644
--- a/arch/x86/include/asm/hugetlb.h
+++ b/arch/x86/include/asm/hugetlb.h@@ -15,6 +15,14 @@ static inline bool vmemmap_pmd_huge(pmd_t *pmd) { return pmd_large(*pmd); } + +#define vmemmap_pmd_mkhuge vmemmap_pmd_mkhuge +static inline pmd_t vmemmap_pmd_mkhuge(struct page *page) +{ + pte_t entry = pfn_pte(page_to_pfn(page), PAGE_KERNEL_LARGE); + + return __pmd(pte_val(entry)); +} #endif #define hugepages_supported() boot_cpu_has(X86_FEATURE_PSE)
--
2.20.1