watchdog code

[anish kumar]

>From your comments in this thread https://lkml.org/lkml/2011/3/25/723 

>The msm watchdog driver is present in kernel only. It does not use the
>built-in Linux watchdog api. This is because the primary function of
>our watchdog is detecting bus lockups and interrupts being turned off
Doesn't linux original implementation(kernel/watchdog.c) already cover
this?If not then how does this implementation detect it i.e. bus lockup
and interrupt turned off for long time?
Does this piece of code can co-exist with the soft/hard lockup detection
in the core kernel?
>for long periods of time. We wanted this functionality to be present
>regardless of the userspace the kernel is running beneath. Userspace is
>free to have its own watchdog implemented in software.
what does this mean, can you elaborate?

>Signed-off-by: Jeff Ohlstein <johlstei@xxxxxxxxxxxxxx>
In my personal opinion, we should always acknowledge the code from which
this code is inspired :)

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