[PATCH 3/5] gpio/omap: optimise interrupt service routine

[Linus Walleij]

On Thu, Apr 4, 2013 at 10:16 PM, Jon Hunter <jon-hunter at ti.com> wrote:

> The OMAP GPIO interrupt service routine is checking each bit in the
> GPIO interrupt status register to see which bits are set. It is not
> efficient to check every bit especially if only a few bits are set.
> Therefore, instead of checking every bit use the __ffs() function,
> which returns the location of the first set bit, to find all the set
> bits.
>
> This optimisation was suggested-by and developed in collaboration
> with Felipe Balbi.
>
> Cc: Felipe Balbi <balbi at ti.com>
>
> Signed-off-by: Jon Hunter <jon-hunter at ti.com>

Patch applied with Felipe's Reviewed-by tag.

Thanks,
Linus Walleij