linux-kernel - sparc: struct device - replace bus_id with dev_name(), dev_set

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-next>] [day] [month] [year] [list]

Message-Id: <1226018639.3189.15.camel@nga>
Date:	Fri, 07 Nov 2008 01:43:59 +0100
From:	Kay Sievers <kay.sievers@...y.org>
To:	"David S. Miller" <davem@...emloft.net>,
	"William L. Irwin" <wli@...omorphy.com>
Cc:	Greg KH <greg@...ah.com>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: sparc: struct device - replace bus_id with dev_name(),
 dev_set_name()

(I did not compile or test it, please let me know, or help fixing
 it, if something is wrong with the conversion)

This patch is part of a larger patch series which will remove
the "char bus_id[20]" name string from struct device. The device
name is managed in the kobject anyway, and without any size
limitation, and just needlessly copied into "struct device".

To set and read the device name dev_name(dev) and dev_set_name(dev)
must be used. If your code uses static kobjects, which it shouldn't
do, "const char *init_name" can be used to statically provide the
name the registered device should have. At registration time, the
init_name field is cleared, to enforce the use of dev_name(dev) to
access the device name at a later time.

We need to get rid of all occurrences of bus_id in the entire tree
to be able to enable the new interface. Please apply this patch,
and possibly convert any remaining remaining occurrences of bus_id.

We want to submit a patch to -next, which will remove bus_id from
"struct device", to find the remaining pieces to convert, and finally
switch over to the new api, which will remove the 20 bytes array
and does no longer have a size limitation.

Thanks,
Kay

From: Kay Sievers <kay.sievers@...y.org>
Subject: sparc: struct device - replace bus_id with dev_name(), dev_set_name()

Cc: David S. Miller <davem@...emloft.net>
Cc: William L. Irwin <wli@...omorphy.com>
Cc: sparclinux@...r.kernel.org
Acked-by: Greg Kroah-Hartman <gregkh@...e.de>
Signed-off-by: Kay Sievers <kay.sievers@...y.org>
---
 arch/sparc/kernel/of_device.c |    4 ++--
 arch/sparc64/kernel/vio.c     |    2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

--- a/arch/sparc/kernel/of_device.c
+++ b/arch/sparc/kernel/of_device.c
@@ -563,9 +563,9 @@ build_resources:
 	op->dev.parent = parent;
 	op->dev.bus = &of_platform_bus_type;
 	if (!parent)
-		strcpy(op->dev.bus_id, "root");
+		dev_set_name(&op->dev, "root");
 	else
-		sprintf(op->dev.bus_id, "%08x", dp->node);
+		dev_set_name(&op->dev, "%08x", dp->node);

 	if (of_device_register(op)) {
 		printk("%s: Could not register of device.\n",
--- a/arch/sparc64/kernel/vio.c
+++ b/arch/sparc64/kernel/vio.c
@@ -224,7 +224,7 @@ static struct vio_dev *vio_create_one(st
 	if (!strcmp(type, "domain-services-port"))
 		bus_id_name = "ds";

-	if (strlen(bus_id_name) >= BUS_ID_SIZE - 4) {
+	if (strlen(bus_id_name) >= 20 - 4) {
 		printk(KERN_ERR "VIO: bus_id_name [%s] is too long.\n",
 		       bus_id_name);
 		return NULL;

--
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/