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mm: use flush_icache_pages() in do_set_pmd()

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Push the iteration over each page down to the architectures (many can
flush the entire THP without iteration).

Link: https://lkml.kernel.org/r/20230802151406.3735276-34-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Matthew Wilcox (Oracle) 2023-08-02 16:14:01 +01:00 committed by Andrew Morton
parent af4fcb0729
commit 9f1f5b60e7
1 changed files with 1 additions and 3 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

4
mm/memory.c
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@ -4265,7 +4265,6 @@ vm_fault_t do_set_pmd(struct vm_fault *vmf, struct page *page)
bool write = vmf->flags & FAULT_FLAG_WRITE; bool write = vmf->flags & FAULT_FLAG_WRITE;
unsigned long haddr = vmf->address & HPAGE_PMD_MASK; unsigned long haddr = vmf->address & HPAGE_PMD_MASK;
pmd_t entry; pmd_t entry;
int i;
vm_fault_t ret = VM_FAULT_FALLBACK; vm_fault_t ret = VM_FAULT_FALLBACK;
if (!transhuge_vma_suitable(vma, haddr)) if (!transhuge_vma_suitable(vma, haddr))
@ -4298,8 +4297,7 @@ vm_fault_t do_set_pmd(struct vm_fault *vmf, struct page *page)
if (unlikely(!pmd_none(*vmf->pmd))) if (unlikely(!pmd_none(*vmf->pmd)))
goto out; goto out;
for (i = 0; i < HPAGE_PMD_NR; i++) flush_icache_pages(vma, page, HPAGE_PMD_NR);
flush_icache_page(vma, page + i);
entry = mk_huge_pmd(page, vma->vm_page_prot); entry = mk_huge_pmd(page, vma->vm_page_prot);
if (write) if (write)