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Tue, 17 Aug 2021 15:47:53 +0000 From: Liam Howlett To: "maple-tree@lists.infradead.org" , "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" , Andrew Morton CC: Song Liu , Davidlohr Bueso , "Paul E . McKenney" , Matthew Wilcox , Laurent Dufour , David Rientjes , Axel Rasmussen , Suren Baghdasaryan , Vlastimil Babka , Rik van Riel , Peter Zijlstra , Michel Lespinasse , Liam Howlett Subject: [PATCH v2 35/61] fs/exec: Use vma_next() instead of linked list Thread-Topic: [PATCH v2 35/61] fs/exec: Use vma_next() instead of linked list Thread-Index: AQHXk38rgHxsfRGd/0isQoVwrht0gg== Date: Tue, 17 Aug 2021 15:47:23 +0000 Message-ID: <20210817154651.1570984-36-Liam.Howlett@oracle.com> References: <20210817154651.1570984-1-Liam.Howlett@oracle.com> In-Reply-To: <20210817154651.1570984-1-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: da2e62b6-d785-4c93-f99d-08d961966010 x-ms-traffictypediagnostic: DM6PR10MB4236: x-ms-exchange-transport-forked: True x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:6108; 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Howlett" Signed-off-by: Liam R. Howlett --- fs/exec.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/fs/exec.c b/fs/exec.c index 9cc6bf3a5f0c..d3eb43866e1e 100644 --- a/fs/exec.c +++ b/fs/exec.c @@ -680,6 +680,7 @@ static int shift_arg_pages(struct vm_area_struct *vma, = unsigned long shift) unsigned long length =3D old_end - old_start; unsigned long new_start =3D old_start - shift; unsigned long new_end =3D old_end - shift; + struct vm_area_struct *next; struct mmu_gather tlb; =20 BUG_ON(new_start > new_end); @@ -707,12 +708,13 @@ static int shift_arg_pages(struct vm_area_struct *vma= , unsigned long shift) =20 lru_add_drain(); tlb_gather_mmu(&tlb, mm); + next =3D vma_next(mm, vma); if (new_end > old_start) { /* * when the old and new regions overlap clear from new_end. */ free_pgd_range(&tlb, new_end, old_end, new_end, - vma->vm_next ? vma->vm_next->vm_start : USER_PGTABLES_CEILING); + next ? next->vm_start : USER_PGTABLES_CEILING); } else { /* * otherwise, clean from old_start; this is done to not touch @@ -721,7 +723,7 @@ static int shift_arg_pages(struct vm_area_struct *vma, = unsigned long shift) * for the others its just a little faster. */ free_pgd_range(&tlb, old_start, old_end, new_end, - vma->vm_next ? vma->vm_next->vm_start : USER_PGTABLES_CEILING); + next ? next->vm_start : USER_PGTABLES_CEILING); } tlb_finish_mmu(&tlb); =20 --=20 2.30.2