linux-kernel - [PATCH] media/v4l2-core/videobuf-vmalloc.c: Remove dead code

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Date:   Thu, 17 Jan 2019 00:19:33 +0530
From:   Souptick Joarder <jrdr.linux@...il.com>
To:     mchehab@...nel.org, brian.warner@...sung.com
Cc:     linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        brajeswar.linux@...il.com, sabyasachi.linux@...il.com
Subject: [PATCH] media/v4l2-core/videobuf-vmalloc.c: Remove dead code

This code is commented since version 3.7. If there is no plan to
use it in future, we can remove this dead code.

Signed-off-by: Souptick Joarder <jrdr.linux@...il.com>
---
 drivers/media/v4l2-core/videobuf-vmalloc.c | 20 --------------------
 1 file changed, 20 deletions(-)

diff --git a/drivers/media/v4l2-core/videobuf-vmalloc.c b/drivers/media/v4l2-core/videobuf-vmalloc.c
index 45fe781..293213a 100644
--- a/drivers/media/v4l2-core/videobuf-vmalloc.c
+++ b/drivers/media/v4l2-core/videobuf-vmalloc.c
@@ -196,26 +196,6 @@ static int __videobuf_iolock(struct videobuf_queue *q,
 		}
 		dprintk(1, "vmalloc is at addr %p (%d pages)\n",
 			mem->vaddr, pages);
-
-#if 0
-		int rc;
-		/* Kernel userptr is used also by read() method. In this case,
-		   there's no need to remap, since data will be copied to user
-		 */
-		if (!vb->baddr)
-			return 0;
-
-		/* FIXME: to properly support USERPTR, remap should occur.
-		   The code below won't work, since mem->vma = NULL
-		 */
-		/* Try to remap memory */
-		rc = remap_vmalloc_range(mem->vma, (void *)vb->baddr, 0);
-		if (rc < 0) {
-			printk(KERN_ERR "mmap: remap failed with error %d", rc);
-			return -ENOMEM;
-		}
-#endif
-
 		break;
 	case V4L2_MEMORY_OVERLAY:
 	default:
-- 
1.9.1