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Revision 11cc92eb747aace5aa2b54b65b5cb8325a8981de authored by Michael Ellerman on 25 December 2020, 11:30:58 UTC, committed by Linus Torvalds on 25 December 2020, 19:02:39 UTC 
genirq: Fix export of irq_to_desc() for powerpc KVM
 
Commit 64a1b95bb9fe ("genirq: Restrict export of irq_to_desc()") removed
the export of irq_to_desc() unless powerpc KVM is being built, because
there is still a use of irq_to_desc() in modular code there.

However it used:

  #ifdef CONFIG_KVM_BOOK3S_64_HV

Which doesn't work when that symbol is =m, leading to a build failure:

  ERROR: modpost: "irq_to_desc" [arch/powerpc/kvm/kvm-hv.ko] undefined!

Fix it by checking for the definedness of the correct symbol which is
CONFIG_KVM_BOOK3S_64_HV_MODULE.

Fixes: 64a1b95bb9fe ("genirq: Restrict export of irq_to_desc()")
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1 parent 7bb5226
Raw File
Kconfig.iosched 
# SPDX-License-Identifier: GPL-2.0
if BLOCK

menu "IO Schedulers"

config MQ_IOSCHED_DEADLINE
	tristate "MQ deadline I/O scheduler"
	default y
	help
	  MQ version of the deadline IO scheduler.

config MQ_IOSCHED_KYBER
	tristate "Kyber I/O scheduler"
	default y
	help
	  The Kyber I/O scheduler is a low-overhead scheduler suitable for
	  multiqueue and other fast devices. Given target latencies for reads and
	  synchronous writes, it will self-tune queue depths to achieve that
	  goal.

config IOSCHED_BFQ
	tristate "BFQ I/O scheduler"
	help
	BFQ I/O scheduler for BLK-MQ. BFQ distributes the bandwidth of
	of the device among all processes according to their weights,
	regardless of the device parameters and with any workload. It
	also guarantees a low latency to interactive and soft
	real-time applications.  Details in
	Documentation/block/bfq-iosched.rst

config BFQ_GROUP_IOSCHED
       bool "BFQ hierarchical scheduling support"
       depends on IOSCHED_BFQ && BLK_CGROUP
       select BLK_CGROUP_RWSTAT
	help

       Enable hierarchical scheduling in BFQ, using the blkio
       (cgroups-v1) or io (cgroups-v2) controller.

config BFQ_CGROUP_DEBUG
	bool "BFQ IO controller debugging"
	depends on BFQ_GROUP_IOSCHED
	help
	Enable some debugging help. Currently it exports additional stat
	files in a cgroup which can be useful for debugging.

endmenu

endif
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