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| author | Dave Hansen <dave.hansen@linux.intel.com> | 2021-10-18 15:15:32 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-10-18 20:22:02 -1000 |
| commit | 76af6a054da4055305ddb28c5eb151b9ee4f74f9 (patch) | |
| tree | e34d52b5a37b46a5bb8f7541e3976dd10efa5922 /mm/page_ext.c | |
| parent | 295be91f7ef0027fca2f2e4788e99731aa931834 (diff) | |
| download | lwn-76af6a054da4055305ddb28c5eb151b9ee4f74f9.tar.gz lwn-76af6a054da4055305ddb28c5eb151b9ee4f74f9.zip | |
mm/migrate: add CPU hotplug to demotion #ifdef
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>
Diffstat (limited to 'mm/page_ext.c')
| -rw-r--r-- | mm/page_ext.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/mm/page_ext.c b/mm/page_ext.c index dfb91653d359..2a52fd9ed464 100644 --- a/mm/page_ext.c +++ b/mm/page_ext.c @@ -269,7 +269,7 @@ static int __meminit init_section_page_ext(unsigned long pfn, int nid) total_usage += table_size; return 0; } -#ifdef CONFIG_MEMORY_HOTPLUG + static void free_page_ext(void *addr) { if (is_vmalloc_addr(addr)) { @@ -374,8 +374,6 @@ static int __meminit page_ext_callback(struct notifier_block *self, return notifier_from_errno(ret); } -#endif - void __init page_ext_init(void) { unsigned long pfn; |