diff mbox series

[RESEND,v2,4/4] mm/mremap: start addresses are properly aligned

Message ID 20200626135216.24314-5-richard.weiyang@linux.alibaba.com (mailing list archive)
State New, archived
Headers show
Series mm/mremap: cleanup move_page_tables() a little | expand

Commit Message

Wei Yang June 26, 2020, 1:52 p.m. UTC 
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 <richard.weiyang@linux.alibaba.com>
Tested-by: Dmitry Osipenko <digetx@gmail.com>
---
 mm/huge_memory.c | 3 ---
 mm/mremap.c      | 3 ---
 2 files changed, 6 deletions(-)
diff mbox series

Patch

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 a30b3e86cc99..f5f17d050617 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 release it.