Message ID | 20230117023335.1690727-38-Liam.Howlett@oracle.com (mailing list archive) |
---|---|
State | New |
Headers | show
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Tue, 17 Jan 2023 02:34:58 +0000 Received: from SN6PR10MB3022.namprd10.prod.outlook.com ([fe80::a02:2ac8:ee3e:682]) by SN6PR10MB3022.namprd10.prod.outlook.com ([fe80::a02:2ac8:ee3e:682%4]) with mapi id 15.20.6002.012; Tue, 17 Jan 2023 02:34:58 +0000 From: Liam Howlett <liam.howlett@oracle.com> To: "linux-mm@kvack.org" <linux-mm@kvack.org>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, Andrew Morton <akpm@linux-foundation.org>, "maple-tree@lists.infradead.org" <maple-tree@lists.infradead.org> CC: Liam Howlett <liam.howlett@oracle.com>, Li Zetao <lizetao1@huawei.com>, Liam Howlett <liam.howlett@oracle.com> Subject: [PATCH v3 37/48] mmap: Clean up mmap_region() unrolling Thread-Topic: [PATCH v3 37/48] mmap: Clean up mmap_region() unrolling Thread-Index: AQHZKhw0q455l2QlfUe6spyRGlMLCQ== Date: Tue, 17 Jan 2023 02:34:21 +0000 Message-ID: <20230117023335.1690727-38-Liam.Howlett@oracle.com> References: <20230117023335.1690727-1-Liam.Howlett@oracle.com> In-Reply-To: <20230117023335.1690727-1-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 2.35.1 x-ms-publictraffictype: Email x-ms-traffictypediagnostic: SN6PR10MB3022:EE_|CO6PR10MB5538:EE_ x-ms-office365-filtering-correlation-id: 8f17b27a-8181-4d84-8773-08daf8336d03 x-ms-exchange-senderadcheck: 1 x-ms-exchange-antispam-relay: 0 x-microsoft-antispam: BCL:0; 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Series |
VMA tree type safety and remove __vma_adjust()
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expand
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diff --git a/mm/mmap.c b/mm/mmap.c index cc53f638187b..01988db478e1 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -2600,12 +2600,11 @@ unsigned long mmap_region(struct file *file, unsigned long addr, * Expansion is handled above, merging is handled below. * Drivers should not alter the address of the VMA. */ - if (WARN_ON((addr != vma->vm_start))) { - error = -EINVAL; + error = -EINVAL; + if (WARN_ON((addr != vma->vm_start))) goto close_and_free_vma; - } - vma_iter_set(&vmi, addr); + vma_iter_set(&vmi, addr); /* * If vm_flags changed after call_mmap(), we should try merge * vma again as we may succeed this time. @@ -2642,25 +2641,13 @@ unsigned long mmap_region(struct file *file, unsigned long addr, } /* Allow architectures to sanity-check the vm_flags */ - if (!arch_validate_flags(vma->vm_flags)) { - error = -EINVAL; - if (file) - goto close_and_free_vma; - else if (vma->vm_file) - goto unmap_and_free_vma; - else - goto free_vma; - } + error = -EINVAL; + if (!arch_validate_flags(vma->vm_flags)) + goto close_and_free_vma; - if (vma_iter_prealloc(&vmi, vma)) { - error = -ENOMEM; - if (file) - goto close_and_free_vma; - else if (vma->vm_file) - goto unmap_and_free_vma; - else - goto free_vma; - } + error = -ENOMEM; + if (vma_iter_prealloc(&vmi, vma)) + goto close_and_free_vma; if (vma->vm_file) i_mmap_lock_write(vma->vm_file->f_mapping); @@ -2719,14 +2706,18 @@ unsigned long mmap_region(struct file *file, unsigned long addr, return addr; close_and_free_vma: - if (vma->vm_ops && vma->vm_ops->close) + if (file && vma->vm_ops && vma->vm_ops->close) vma->vm_ops->close(vma); + + if (file || vma->vm_file) { unmap_and_free_vma: - fput(vma->vm_file); - vma->vm_file = NULL; + fput(vma->vm_file); + vma->vm_file = NULL; - /* Undo any partial mapping done by a device driver. */ - unmap_region(mm, &mm->mm_mt, vma, prev, next, vma->vm_start, vma->vm_end); + /* Undo any partial mapping done by a device driver. */ + unmap_region(mm, &mm->mm_mt, vma, prev, next, vma->vm_start, + vma->vm_end); + } if (file && (vm_flags & VM_SHARED)) mapping_unmap_writable(file->f_mapping); free_vma: