linux-kernel - [PATCH 2/5] uio: Kill unused vma

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <m1zkv486lj.fsf_-_@fess.ebiederm.org>
Date:	Sun, 26 Sep 2010 15:47:52 -0700
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	Greg KH <greg@...ah.com>
Cc:	Greg KH <gregkh@...e.de>, "Hans J. Koch" <hjk@...utronix.de>,
	linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>
Subject: [PATCH 2/5] uio: Kill unused vma_count.


Remove the tracking of how many vmas are using in the uio memory
mapping mode.  The uio code doesn't use that information anywhere.

Signed-off-by: Eric W. Biederman <ebiederm@...stanetworks.com>
---
 drivers/uio/uio.c |   16 ----------------
 1 files changed, 0 insertions(+), 16 deletions(-)

diff --git a/drivers/uio/uio.c b/drivers/uio/uio.c
index 565559c..95f25ae 100644
--- a/drivers/uio/uio.c
+++ b/drivers/uio/uio.c
@@ -35,7 +35,6 @@ struct uio_device {
 	atomic_t		event;
 	struct fasync_struct	*async_queue;
 	wait_queue_head_t	wait;
-	int			vma_count;
 	struct uio_info		*info;
 	struct kobject		*map_dir;
 	struct kobject		*portio_dir;
@@ -599,18 +598,6 @@ static int uio_find_mem_index(struct vm_area_struct *vma)
 	return -1;
 }
 
-static void uio_vma_open(struct vm_area_struct *vma)
-{
-	struct uio_device *idev = vma->vm_private_data;
-	idev->vma_count++;
-}
-
-static void uio_vma_close(struct vm_area_struct *vma)
-{
-	struct uio_device *idev = vma->vm_private_data;
-	idev->vma_count--;
-}
-
 static int uio_vma_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
 {
 	struct uio_device *idev = vma->vm_private_data;
@@ -638,8 +625,6 @@ static int uio_vma_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
 }
 
 static const struct vm_operations_struct uio_vm_ops = {
-	.open = uio_vma_open,
-	.close = uio_vma_close,
 	.fault = uio_vma_fault,
 };
 
@@ -665,7 +650,6 @@ static int uio_mmap_logical(struct vm_area_struct *vma)
 {
 	vma->vm_flags |= VM_RESERVED;
 	vma->vm_ops = &uio_vm_ops;
-	uio_vma_open(vma);
 	return 0;
 }
 
-- 
1.7.2.2

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/