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powernv/memtrace: always online added memory blocks

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Let's always try to online the re-added memory blocks.  In case
add_memory() already onlined the added memory blocks, the first
device_online() call will fail and stop processing the remaining memory
blocks.

This avoids manually having to check memhp_auto_online.

Note: PPC always onlines all hotplugged memory directly from the kernel as
well - something that is handled by user space on other architectures.

Signed-off-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Wei Yang <richard.weiyang@gmail.com>
Reviewed-by: Baoquan He <bhe@redhat.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Haiyang Zhang <haiyangz@microsoft.com>
Cc: Igor Mammedov <imammedo@redhat.com>
Cc: "K. Y. Srinivasan" <kys@microsoft.com>
Cc: Stephen Hemminger <sthemmin@microsoft.com>
Cc: Vitaly Kuznetsov <vkuznets@redhat.com>
Cc: Wei Liu <wei.liu@kernel.org>
Cc: Yumei Huang <yuhuang@redhat.com>
Link: http://lkml.kernel.org/r/20200317104942.11178-5-david@redhat.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
David Hildenbrand 2020-04-06 20:07:28 -07:00 committed by Linus Torvalds
parent 4dc8207bfd
commit ed7f9fec8c
1 changed files with 4 additions and 10 deletions
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14
arch/powerpc/platforms/powernv/memtrace.c
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@ -231,16 +231,10 @@ static int memtrace_online(void)
continue;
}
/*
* If kernel isn't compiled with the auto online option
* we need to online the memory ourselves.
*/
if (!memhp_auto_online) {
lock_device_hotplug();
walk_memory_blocks(ent->start, ent->size, NULL,
online_mem_block);
unlock_device_hotplug();
}
lock_device_hotplug();
walk_memory_blocks(ent->start, ent->size, NULL,
online_mem_block);
unlock_device_hotplug();
/*
* Memory was added successfully so clean up references to it