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drivers/base/memory: map MMOP_OFFLINE to 0
Historically, we used the value -1. Just treat 0 as the special case now. Clarify a comment (which was wrong, when we come via device_online() the first time, the online_type would have been 0 / MEM_ONLINE). The default is now always MMOP_OFFLINE. This removes the last user of the manual "-1", which didn't use the enum value. This is a preparation to use the online_type as an array index. 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> Acked-by: Pankaj Gupta <pankaj.gupta.linux@gmail.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Oscar Salvador <osalvador@suse.de> Cc: "Rafael J. Wysocki" <rafael@kernel.org> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.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: Michael Ellerman <mpe@ellerman.id.au> Cc: Paul Mackerras <paulus@samba.org> 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/20200317104942.11178-3-david@redhat.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -203,17 +203,14 @@ static int memory_subsys_online(struct device *dev)
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return 0;
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/*
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* If we are called from state_store(), online_type will be
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* set >= 0 Otherwise we were called from the device online
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* attribute and need to set the online_type.
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* When called via device_online() without configuring the online_type,
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* we want to default to MMOP_ONLINE.
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*/
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if (mem->online_type < 0)
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if (mem->online_type == MMOP_OFFLINE)
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mem->online_type = MMOP_ONLINE;
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ret = memory_block_change_state(mem, MEM_ONLINE, MEM_OFFLINE);
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/* clear online_type */
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mem->online_type = -1;
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mem->online_type = MMOP_OFFLINE;
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return ret;
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}
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@ -48,7 +48,7 @@ enum {
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/* Types for control the zone type of onlined and offlined memory */
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enum {
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/* Offline the memory. */
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MMOP_OFFLINE = -1,
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MMOP_OFFLINE = 0,
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/* Online the memory. Zone depends, see default_zone_for_pfn(). */
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MMOP_ONLINE,
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/* Online the memory to ZONE_NORMAL. */
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