From 9db4f36e82c2394c958d8e42a498fb664684bc22 Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Thu, 27 Oct 2016 15:49:12 -0700
Subject: [PATCH] mm: remove unused variable in memory hotplug
When I removed the per-zone bitlock hashed waitqueues in commit
9dcb8b685fc3 ("mm: remove per-zone hashtable of bitlock waitqueues"), I
removed all the magic hotplug memory initialization of said waitqueues
too.
But when I actually _tested_ the resulting build, I stupidly assumed
that "allmodconfig" would enable memory hotplug. And it doesn't,
because it enables KASAN instead, which then disables hotplug memory
support.
As a result, my build test of the per-zone waitqueues was totally
broken, and I didn't notice that the compiler warns about the now unused
iterator variable 'i'.
I guess I should be happy that that seems to be the worst breakage from
my clearly horribly failed test coverage.
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
mm/memory_hotplug.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index b18dab401be6e..cad4b9125695c 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -2117,7 +2117,6 @@ void try_offline_node(int nid)
unsigned long start_pfn = pgdat->node_start_pfn;
unsigned long end_pfn = start_pfn + pgdat->node_spanned_pages;
unsigned long pfn;
- int i;
for (pfn = start_pfn; pfn < end_pfn; pfn += PAGES_PER_SECTION) {
unsigned long section_nr = pfn_to_section_nr(pfn);
--
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