unable to find function definition

[john@jjdev.com (John de la Garza)]

On Tue, Apr 26, 2016 at 02:00:02PM +0530, Jay Aurabind wrote:
> On 20 April 2016 at 12:56, Cihangir Akturk <cakturk@gmail.com> wrote:
> > On Wed, Apr 20, 2016 at 06:17:38AM +0000, Nijam Haider wrote:
> >> i was going through the code leds-gpio.c.
> >> i found a function "platform_gpio_blink_set" declared under private data of
> >> "gpio_led_data",and was trying to get through this function. But hardly i can
> >> find any link to definition for the same anywhere.
> >
> > Hi,
> >
> > That is a function pointer, so you should search assignments to
> > that pointer. That way you can find the real function you are
> > looking for.
> 
> I've spotted such usages in a lot of places, outside the kernel as
> well. Just wanted know if there is a smarted way of finding the
> assignments, like some tools or any other tips which people could use
> to make life easier ?

I've been able to print the address of the functions (once it has
been assigned), then check the System.map for the function name.