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wext: make sysfs bits optional and deprecate them 

The /sys/class/net/*/wireless/ direcory is, as far as I know, not
used by anyone. Additionally, the same data is available via wext
ioctls. Hence the sysfs files are pretty much useless. This patch
makes them optional and schedules them for removal.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Cc: Jean Tourrilhes <jt@hpl.hp.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Johannes Berg 2008-07-10 11:16:47 +02:00 committed by John W. Linville
parent 1411f9b531
commit 22bb1be4d2
3 changed files with 23 additions and 2 deletions
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10
Documentation/feature-removal-schedule.txt
View File

@ -333,3 +333,13 @@ Why: This option was introduced just to allow older lm-sensors userspace
to keep working over the upgrade to 2.6.26. At the scheduled time of
removal fixed lm-sensors (2.x or 3.x) should be readily available.
Who: Rene Herman <rene.herman@gmail.com>
---------------------------
What: Code that is now under CONFIG_WIRELESS_EXT_SYSFS
(in net/core/net-sysfs.c)
When: After the only user (hal) has seen a release with the patches
for enough time, probably some time in 2010.
Why: Over 1K .text/.data size reduction, data is available in other
ways (ioctls)
Who: Johannes Berg <johannes@sipsolutions.net>

4
net/core/net-sysfs.c
View File

@ -318,7 +318,7 @@ static struct attribute_group netstat_group = {
.attrs = netstat_attrs,
};
#ifdef CONFIG_WIRELESS_EXT
#ifdef CONFIG_WIRELESS_EXT_SYSFS
/* helper function that does all the locking etc for wireless stats */
static ssize_t wireless_show(struct device *d, char *buf,
ssize_t (*format)(const struct iw_statistics *,
@ -459,7 +459,7 @@ int netdev_register_kobject(struct net_device *net)
#ifdef CONFIG_SYSFS
*groups++ = &netstat_group;
#ifdef CONFIG_WIRELESS_EXT
#ifdef CONFIG_WIRELESS_EXT_SYSFS
if (net->wireless_handlers && net->wireless_handlers->get_wireless_stats)
*groups++ = &wireless_group;
#endif

11
net/wireless/Kconfig
View File

@ -29,3 +29,14 @@ config WIRELESS_EXT
Say N (if you can) unless you know you need wireless
extensions for external modules.
config WIRELESS_EXT_SYSFS
bool "Wireless extensions sysfs files"
default y
depends on WIRELESS_EXT && SYSFS
help
This option enables the deprecated wireless statistics
files in /sys/class/net/*/wireless/. The same information
is available via the ioctls as well.
Say Y if you have programs using it (we don't know of any).