From c045c72ccde3a267963f8e85f388db4c40dea3b3 Mon Sep 17 00:00:00 2001 From: Miaohe Lin Date: Wed, 24 Feb 2021 12:04:36 -0800 Subject: mm/pgtable-generic.c: simplify the VM_BUG_ON condition in pmdp_huge_clear_flush() The condition (A && !C && !D) || !A is equivalent to !A || (A && !C && !D) and can be further simplified to !A || (!C && !D). Link: https://lkml.kernel.org/r/20210201114319.34720-1-linmiaohe@huawei.com Signed-off-by: Miaohe Lin Reviewed-by: Andrew Morton Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/pgtable-generic.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/mm/pgtable-generic.c b/mm/pgtable-generic.c index 9578db83e312..fa1375f3e3b2 100644 --- a/mm/pgtable-generic.c +++ b/mm/pgtable-generic.c @@ -135,8 +135,8 @@ pmd_t pmdp_huge_clear_flush(struct vm_area_struct *vma, unsigned long address, { pmd_t pmd; VM_BUG_ON(address & ~HPAGE_PMD_MASK); - VM_BUG_ON((pmd_present(*pmdp) && !pmd_trans_huge(*pmdp) && - !pmd_devmap(*pmdp)) || !pmd_present(*pmdp)); + VM_BUG_ON(!pmd_present(*pmdp) || (!pmd_trans_huge(*pmdp) && + !pmd_devmap(*pmdp))); pmd = pmdp_huge_get_and_clear(vma->vm_mm, address, pmdp); flush_pmd_tlb_range(vma, address, address + HPAGE_PMD_SIZE); return pmd; -- cgit