From mboxrd@z Thu Jan  1 00:00:00 1970
From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Subject: Re: [PATCH v3 2/5] build: Hook the schedulers into
 Kconfig
Date: Fri, 8 Jan 2016 10:47:44 -0500
Message-ID: <20160108154744.GE32260@char.us.oracle.com>
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To: Jonathan Creekmore <jonathan.creekmore@gmail.com>
Cc: George Dunlap <george.dunlap@eu.citrix.com>, xen-devel@lists.xenproject.org, Dario Faggioli <dario.faggioli@citrix.com>
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On Thu, Jan 07, 2016 at 11:29:18AM -0600, Jonathan Creekmore wrote:
> Allow the schedulers to be independently enabled or disabled at
> compile-time. To match existing behavior, all four schedulers are
> compiled in by default, although the Credit2, RTDS, and ARINC653 are
> marked EXPERIMENTAL to match their not currently supported status.

By unmarking all of them in sequence I was able to get this:

#
# Schedulers
#
# CONFIG_SCHED_CREDIT is not set
# CONFIG_SCHED_CREDIT2 is not set
# CONFIG_SCHED_RTDS is not set
# CONFIG_SCHED_ARINC653 is not set
# CONFIG_SCHED_CREDIT_DEFAULT is not set
# CONFIG_SCHED_CREDIT2_DEFAULT is not set
# CONFIG_SCHED_RTDS_DEFAULT is not set
# CONFIG_SCHED_ARINC653_DEFAULT is not set
CONFIG_SCHED_DEFAULT="credit"


And the hypervisor did build with:

[konrad@char xen]$ nm --defined xen-syms |grep schedulers
ffff82d080290d58 D __end_schedulers_array
ffff82d080290d58 D __start_schedulers_array

:-)

Not exactly sure if there is some way to make us _not_ shoot
ourselves in the foot by mistake.

Perhaps the build should complain if the size of the
__schedulers_array is zero?