https://github.com/torvalds/linux
Revision 76af6a054da4055305ddb28c5eb151b9ee4f74f9 authored by Dave Hansen on 18 October 2021, 22:15:32 UTC, committed by Linus Torvalds on 19 October 2021, 06:22:02 UTC
Once upon a time, the node demotion updates were driven solely by memory hotplug events. But now, there are handlers for both CPU and memory hotplug. However, the #ifdef around the code checks only memory hotplug. A system that has HOTPLUG_CPU=y but MEMORY_HOTPLUG=n would miss CPU hotplug events. Update the #ifdef around the common code. Add memory and CPU-specific #ifdefs for their handlers. These memory/CPU #ifdefs avoid unused function warnings when their Kconfig option is off. [arnd@arndb.de: rework hotplug_memory_notifier() stub] Link: https://lkml.kernel.org/r/20211013144029.2154629-1-arnd@kernel.org Link: https://lkml.kernel.org/r/20210924161255.E5FE8F7E@davehans-spike.ostc.intel.com Fixes: 884a6e5d1f93 ("mm/migrate: update node demotion order on hotplug events") Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: "Huang, Ying" <ying.huang@intel.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Wei Xu <weixugc@google.com> Cc: Oscar Salvador <osalvador@suse.de> Cc: David Rientjes <rientjes@google.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: David Hildenbrand <david@redhat.com> Cc: Greg Thelen <gthelen@google.com> Cc: Yang Shi <yang.shi@linux.alibaba.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Tip revision: 76af6a054da4055305ddb28c5eb151b9ee4f74f9 authored by Dave Hansen on 18 October 2021, 22:15:32 UTC
mm/migrate: add CPU hotplug to demotion #ifdef
mm/migrate: add CPU hotplug to demotion #ifdef
Tip revision: 76af6a0
Kconfig
# SPDX-License-Identifier: GPL-2.0
menuconfig ACCESSIBILITY
bool "Accessibility support"
help
Accessibility handles all special kinds of hardware devices or
software adapters which help people with disabilities (e.g.
blindness) to use computers.
That includes braille devices, speech synthesis, keyboard
remapping, etc.
Say Y here to get to see options for accessibility.
This option alone does not add any kernel code.
If you say N, all options in this submenu will be skipped and disabled.
If unsure, say N.
if ACCESSIBILITY
config A11Y_BRAILLE_CONSOLE
bool "Console on braille device"
depends on VT
depends on SERIAL_CORE_CONSOLE
help
Enables console output on a braille device connected to a 8250
serial port. For now only the VisioBraille device is supported.
To actually enable it, you need to pass option
console=brl,ttyS0
to the kernel. Options are the same as for serial console.
If unsure, say N.
source "drivers/accessibility/speakup/Kconfig"
endif # ACCESSIBILITY
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