On Wed, 2012-03-28 at 22:02 -0700, Linus Torvalds wrote:

On Wed, Mar 28, 2012 at 9:42 PM, Stephen Rothwell [off-list ref] wrote:

quoted

How about this (build tested on powerpc allyesconfig):

Looks better.

Grant - what's the plan about that CONFIG_VIRQ_DEBUG thing? In theory
something like it could be useful as a generic thing, but at least
right now it is clearly powerpc-specific (not just that the config
option only exists for powerpc: it has that whole
'powerpc_debugfs_root' thing in it)?

Stephen's patch very much looks like the right thing, but if there was
some plan to actually make this generic ...

Yes, as I said earlier I think Grant should make it generic, there's
no reason to keep that powerpc specific, it's fairly useful and nothing
in userspace relies on the existing location of the debugfs file that I
know about.

Another option is to put the mapping information in /proc/interrupts but
worry that changing anything in there (like adding a column) will break
countless userspace tools.

Cheers,
Ben.