tree bf05775c34c326d11ec7789ba71071755032783d
parent 5f00397644e01adfbebafb5d0ebc01eba522709d
author Nate Diller <nate.diller@gmail.com> 1138093754 +0100
committer Jens Axboe <axboe@suse.de> 1138093754 +0100

[BLOCK] elevator: allow default scheduler to potentially be modular

Jens has decided that allowing the default scheduler to be a module is
a bug, and should not be allowed under kconfig.  However, I find that
scenario useful for debugging, and wish for the kernel to be able to
handle this situation without OOPSing, if I enable such an option in
the .config directly.  This patch dynamically checks for the presence
of the compiled-in default, and falls back to no-op, emitting a
suitable error message, when the default is not available

Tested for a range of boot options on 2.6.16-rc1-mm2.

Signed-off-by: Nate Diller <nate.diller@gmail.com>
Signed-off-by: Jens Axboe <axboe@suse.de>