[RFC PATCH v3] drivercore: Add driver probe deferral mechanism

[Arnd Bergmann]

On Monday 26 September 2011, Grant Likely wrote:
> Actually, in the next iteration, I'm thinking it would be a good idea
> to create a new #define to only be used by probe deferral.  I want it
> to be easy to find all the drivers that are using this mechanism
> without needing to filter all the unrelated hits.  However, this is a
> kernel-only thing so it is probably not appropriate to add it to
> include/asm-generic/errno.h.  I could use some guidance/advice as to
> the best way to handle this.

include/linux/errno.h already has a bunch of kernel-internal error
codes that are never supposed to be seen in user space. Just
add one there, the next free one right now is 517, after
ERESTART_RESTARTBLOCK.

	Arnd