From 349d9fbb0b0a6734bcac9c08c5cc21992da5d2e6 Mon Sep 17 00:00:00 2001 From: Wei Yang Date: Thu, 6 Aug 2020 23:23:48 -0700 Subject: mm/mremap: start addresses are properly aligned After previous cleanup, extent is the minimal step for both source and destination. This means when extent is HPAGE_PMD_SIZE or PMD_SIZE, old_addr and new_addr are properly aligned too. Since these two functions are only invoked in move_page_tables, it is safe to remove the check now. Signed-off-by: Wei Yang Signed-off-by: Andrew Morton Tested-by: Dmitry Osipenko Acked-by: Kirill A. Shutemov Cc: Aneesh Kumar K.V Cc: Anshuman Khandual Cc: Matthew Wilcox Cc: Peter Xu Cc: Sean Christopherson Cc: Thomas Hellstrom Cc: Thomas Hellstrom (VMware) Cc: Vlastimil Babka Cc: Yang Shi Link: http://lkml.kernel.org/r/20200708095028.41706-4-richard.weiyang@linux.alibaba.com Signed-off-by: Linus Torvalds --- mm/huge_memory.c | 3 --- mm/mremap.c | 3 --- 2 files changed, 6 deletions(-) diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 1e580fdad4d0..462a7dbd6350 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -1729,9 +1729,6 @@ bool move_huge_pmd(struct vm_area_struct *vma, unsigned long old_addr, struct mm_struct *mm = vma->vm_mm; bool force_flush = false; - if ((old_addr & ~HPAGE_PMD_MASK) || (new_addr & ~HPAGE_PMD_MASK)) - return false; - /* * The destination pmd shouldn't be established, free_pgtables() * should have release it. diff --git a/mm/mremap.c b/mm/mremap.c index c3622bfcf6d9..138abbae4f75 100644 --- a/mm/mremap.c +++ b/mm/mremap.c @@ -199,9 +199,6 @@ static bool move_normal_pmd(struct vm_area_struct *vma, unsigned long old_addr, struct mm_struct *mm = vma->vm_mm; pmd_t pmd; - if ((old_addr & ~PMD_MASK) || (new_addr & ~PMD_MASK)) - return false; - /* * The destination pmd shouldn't be established, free_pgtables() * should have released it. -- cgit v1.2.3