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McKenney" , Matthew Wilcox , David Rientjes , Axel Rasmussen , Suren Baghdasaryan , Vlastimil Babka , Rik van Riel , Peter Zijlstra Subject: [PATCH v3 56/66] mm/mremap: Use vma_next() instead of vma linked list Thread-Topic: [PATCH v3 56/66] mm/mremap: Use vma_next() instead of vma linked list Thread-Index: AQHXuYirHzkEEnfXBEmxcW6HjmUcXg== Date: Tue, 5 Oct 2021 01:31:07 +0000 Message-ID: <20211005012959.1110504-57-Liam.Howlett@oracle.com> References: <20211005012959.1110504-1-Liam.Howlett@oracle.com> In-Reply-To: <20211005012959.1110504-1-Liam.Howlett@oracle.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-mailer: git-send-email 2.30.2 authentication-results: lists.infradead.org; dkim=none (message not signed) header.d=none;lists.infradead.org; dmarc=none action=none header.from=oracle.com; x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: e2a75ee5-7886-4215-9524-08d9879fd932 x-ms-traffictypediagnostic: BLAPR10MB5044: x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:431; 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Howlett" Signed-off-by: Liam R. Howlett --- mm/mremap.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/mm/mremap.c b/mm/mremap.c index 160ec0d05465..bcfdabab4ab9 100644 --- a/mm/mremap.c +++ b/mm/mremap.c @@ -701,7 +701,7 @@ static unsigned long move_vma(struct vm_area_struct *vm= a, if (excess) { vma->vm_flags |=3D VM_ACCOUNT; if (split) - vma->vm_next->vm_flags |=3D VM_ACCOUNT; + vma_next(mm, vma)->vm_flags |=3D VM_ACCOUNT; } =20 return new_addr; @@ -875,9 +875,11 @@ static unsigned long mremap_to(unsigned long addr, uns= igned long old_len, static int vma_expandable(struct vm_area_struct *vma, unsigned long delta) { unsigned long end =3D vma->vm_end + delta; + struct vm_area_struct *next; if (end < vma->vm_end) /* overflow */ return 0; - if (vma->vm_next && vma->vm_next->vm_start < end) /* intersection */ + next =3D vma_next(vma->vm_mm, vma); + if (next && next->vm_start < end) /* intersection */ return 0; if (get_unmapped_area(NULL, vma->vm_start, end - vma->vm_start, 0, MAP_FIXED) & ~PAGE_MASK) --=20 2.30.2