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McKenney" , Matthew Wilcox , Laurent Dufour , David Rientjes , Axel Rasmussen , Suren Baghdasaryan , Vlastimil Babka , Rik van Riel , Peter Zijlstra , Michel Lespinasse , Liam Howlett Subject: [PATCH 59/94] arch/xtensa: Use maple tree iterators for unmapped area Thread-Topic: [PATCH 59/94] arch/xtensa: Use maple tree iterators for unmapped area Thread-Index: AQHXPEQ6j0S6k1UavUqJQjvUslCcVQ== Date: Wed, 28 Apr 2021 15:36:17 +0000 Message-ID: <20210428153542.2814175-60-Liam.Howlett@Oracle.com> References: <20210428153542.2814175-1-Liam.Howlett@Oracle.com> In-Reply-To: <20210428153542.2814175-1-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-originating-ip: [23.233.25.87] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 2f3f4fdb-aff6-4ffb-9d6f-08d90a5b7000 x-ms-traffictypediagnostic: MWHPR10MB1743: x-ms-exchange-transport-forked: True x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:3631; 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Howlett --- arch/xtensa/kernel/syscall.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/arch/xtensa/kernel/syscall.c b/arch/xtensa/kernel/syscall.c index 201356faa7e6..118fe0ca7594 100644 --- a/arch/xtensa/kernel/syscall.c +++ b/arch/xtensa/kernel/syscall.c @@ -58,6 +58,7 @@ unsigned long arch_get_unmapped_area(struct file *filp, u= nsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags) { struct vm_area_struct *vmm; + MA_STATE(mas, &mm->mm_mt, addr, addr); =20 if (flags & MAP_FIXED) { /* We do not accept a shared mapping if it would violate @@ -79,7 +80,8 @@ unsigned long arch_get_unmapped_area(struct file *filp, u= nsigned long addr, else addr =3D PAGE_ALIGN(addr); =20 - for (vmm =3D find_vma(current->mm, addr); ; vmm =3D vmm->vm_next) { + /* Must hold mm_mt lock */ + mas_for_each(&mas, vmm, ULONG_MAX) { /* At this point: (!vmm || addr < vmm->vm_end). */ if (TASK_SIZE - len < addr) return -ENOMEM; --=20 2.30.2