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2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c

 kernel/drivers/media/v4l2-core/videobuf-vmalloc.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * helper functions for vmalloc video4linux capture buffers
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  *
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@@ -6,11 +7,7 @@
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  * into PAGE_SIZE chunks).  They also assume the driver does not need
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  * to touch the video data.
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  *
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- * (c) 2007 Mauro Carvalho Chehab, <mchehab@kernel.org>
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License as published by
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- * the Free Software Foundation; either version 2
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+ * (c) 2007 Mauro Carvalho Chehab <mchehab@kernel.org>
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  */
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 #include <linux/init.h>
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@@ -18,12 +15,12 @@
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 #include <linux/moduleparam.h>
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 #include <linux/slab.h>
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 #include <linux/interrupt.h>
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+#include <linux/pgtable.h>
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 #include <linux/pci.h>
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 #include <linux/vmalloc.h>
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 #include <linux/pagemap.h>
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 #include <asm/page.h>
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-#include <asm/pgtable.h>
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 #include <media/videobuf-vmalloc.h>
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@@ -171,7 +168,7 @@
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 		/* All handling should be done by __videobuf_mmap_mapper() */
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 		if (!mem->vaddr) {
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-			printk(KERN_ERR "memory is not alloced/mmapped.\n");
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+			printk(KERN_ERR "memory is not allocated/mmapped.\n");
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 			return -EINVAL;
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 		}
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 		break;
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@@ -196,26 +193,6 @@
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 		}
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 		dprintk(1, "vmalloc is at addr %p (%d pages)\n",
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 			mem->vaddr, pages);
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-
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-#if 0
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-		int rc;
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-		/* Kernel userptr is used also by read() method. In this case,
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-		   there's no need to remap, since data will be copied to user
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-		 */
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-		if (!vb->baddr)
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-			return 0;
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-
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-		/* FIXME: to properly support USERPTR, remap should occur.
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-		   The code below won't work, since mem->vma = NULL
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-		 */
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-		/* Try to remap memory */
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-		rc = remap_vmalloc_range(mem->vma, (void *)vb->baddr, 0);
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-		if (rc < 0) {
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-			printk(KERN_ERR "mmap: remap failed with error %d", rc);
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-			return -ENOMEM;
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-		}
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-#endif
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-
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 		break;
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 	case V4L2_MEMORY_OVERLAY:
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 	default: