The patch titled
Subject: mm/mremap: format the check in move_normal_pmd() same as move_huge_pmd()
has been added to the -mm tree. Its filename is
mm-mremap-format-the-check-in-move_normal_pmd-same-as-move_huge_pmd.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-mremap-format-the-check-in-move_normal_pmd-same-as-move_huge_pmd.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-mremap-format-the-check-in-move_normal_pmd-same-as-move_huge_pmd.patch
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------------------------------------------------------
From: Wei Yang <richardw.yang@xxxxxxxxxxxxxxx>
Subject: mm/mremap: format the check in move_normal_pmd() same as move_huge_pmd()
Patch series "mm/mremap.c: cleanup move_page_tables() a little".
move_page_tables() tries to move page table by PMD or PTE.
The root reason is if it tries to move PMD, both old and new range should
be PMD aligned. But current code calculate old range and new range
separately. This leads to some redundant check and calculation.
This cleanup tries to consolidate the range check in one place to reduce
some extra range handling.
This patch (of 5):
No functional change, just improve the readability and prepare for
following cleanup.
Link: http://lkml.kernel.org/r/20200117232254.2792-2-richardw.yang@xxxxxxxxxxxxxxx
Signed-off-by: Wei Yang <richardw.yang@xxxxxxxxxxxxxxx>
Cc: Dan Williams <dan.j.williams@xxxxxxxxx>
Cc: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxx>
Cc: Kirill A. Shutemov <kirill@xxxxxxxxxxxxx>
Cc: Yang Shi <yang.shi@xxxxxxxxxxxxxxxxx>
Cc: Wei Yang <richardw.yang@xxxxxxxxxxxxxxx>
Cc: Thomas Hellstrom <thellstrom@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/mremap.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
--- a/mm/mremap.c~mm-mremap-format-the-check-in-move_normal_pmd-same-as-move_huge_pmd
+++ a/mm/mremap.c
@@ -200,8 +200,9 @@ static bool move_normal_pmd(struct vm_ar
struct mm_struct *mm = vma->vm_mm;
pmd_t pmd;
- if ((old_addr & ~PMD_MASK) || (new_addr & ~PMD_MASK)
- || old_end - old_addr < PMD_SIZE)
+ if ((old_addr & ~PMD_MASK) ||
+ (new_addr & ~PMD_MASK) ||
+ old_end - old_addr < PMD_SIZE)
return false;
/*
_
Patches currently in -mm which might be from richardw.yang@xxxxxxxxxxxxxxx are
mm-thp-remove-the-defer-list-related-code-since-this-will-not-happen.patch
mm-gupc-use-is_vm_hugetlb_page-to-check-whether-to-follow-huge.patch
mm-mremap-format-the-check-in-move_normal_pmd-same-as-move_huge_pmd.patch
mm-mremap-it-is-sure-to-have-enough-space-when-extent-meets-requirement.patch
mm-mremap-use-pmd_addr_end-to-calculate-next-in-move_page_tables.patch
mm-mremap-calculate-extent-in-one-place.patch
mm-mremap-start-addresses-are-properly-aligned.patch
mm-huge_memoryc-use-head-to-check-huge-zero-page.patch
mm-huge_memoryc-use-head-to-emphasize-the-purpose-of-page.patch
mm-huge_memoryc-reduce-critical-section-protected-by-split_queue_lock.patch
mm-remove-dead-code-totalram_pages_set.patch
