[PATCH v4] procfs: Push down the bkl from ioctl

From: Frederic Weisbecker
Date: Sun May 16 2010 - 21:23:50 EST

I have updated this patch because the direct pushdown into
the handler was rather invasive and error prone.

Instead I've used wrappers.

Arnd I've kept your ack, hope it's still fine for you.