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SubjectRE: [PATCH 4/6] drivers:misc: sources for Init manager module

Thanks & Regards,
Pavan Savoy | x0099669
From: Greg KH []
Sent: Tuesday, March 23, 2010 3:06 AM
To: Savoy, Pavan
Subject: Re: [PATCH 4/6] drivers:misc: sources for Init manager module

On Mon, Mar 22, 2010 at 04:19:14PM -0500, wrote:
> +/* structures specific for sysfs entries */
> +static struct kobj_attribute pid_attr =
> +__ATTR(pid, 0644, (void *)show_pid, (void *)store_pid);
> +
> +static struct kobj_attribute list_protocols =
> +__ATTR(protocols, 0444, (void *)show_list, NULL);

>As you are creating sysfs attributes, you have to have
>Documentation/ABI/ updates as well. Please include them so we can see
>what you are trying to do here.
>And why "raw" attributes and not device ones?
>greg k-h

[pavan] >>>>>>>>
I am creating a sysfs entry for the daemon/service to write in it's PID to the sysfs entry, so
as to whenever a new protocol driver - BT/FM or GPS wants to use the N_TI_SHARED ldisc,
the driver would then send signal to daemon on this PID.

The source for this problem, was that I could not install line discipline from kernel space.
i.e make N_TI_SHARED line discipline the current ldisc from kernel space itself.

From 92d89d132b5036d8ab58ce4f36b24bb1859610e0 Mon Sep 17 00:00:00 2001
From: Pavan Savoy <>
Date: Mon, 22 Mar 2010 18:11:32 -0400
Subject: [PATCH 1/1] Documentation/ABI: for N_TI_SHARED ldisc
N_TI_SHARED creates a sysfs entry to communicate
with the application/daemon which would want to install/
un-install the line discipline, it's documentation
now exists in testing/ subdirectory.
Signed-off-by: Pavan Savoy <>
Documentation/ABI/testing/sysfs-uim | 24 ++++++++++++++++++++++++
1 files changed, 24 insertions(+), 0 deletions(-)
create mode 100644 Documentation/ABI/testing/sysfs-uim
diff --git a/Documentation/ABI/testing/sysfs-uim b/Documentation/ABI/testing/sysfs-uim
new file mode 100644
index 0000000..899aa4d
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-uim
@@ -0,0 +1,24 @@
+What: /sys/uim
+Date: March 22
+Contact: Pavan Savoy <>
+ Create a new kobject to pass information about the
+ N_TI_SHARED line discipline created to application/daemon
+ which would install/un-install line discipline.
+What: /sys/uim/pid
+Date: March 22
+Contact: Pavan Savoy <>
+ The daemon/application wanting to use the line discipline
+ N_TI_SHARED will write in it's process Id, for the LDISC
+ driver to send SIGUSR2 signal to the process whenever a
+ upper layer protocol driver wants to make use of the LDISC
+ driver.
+What: /sys/uim/protocols
+Date: March 22
+Contact: Pavan Savoy <>
+ List the protocols currently making use of the LDISC to ensure
+ LDISC is not un-installed when BT/FM or GPS is making use of it.
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