From: Nico Pache Date: Thu, 2 Sep 2021 21:58:08 +0000 (-0700) Subject: mm/page_alloc.c: fix 'zone_id' may be used uninitialized in this function warning X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=b346075fcf5dda7f9e9ae671703aae60e8a94564;p=linux.git mm/page_alloc.c: fix 'zone_id' may be used uninitialized in this function warning When compiling with -Werror, cc1 will warn that 'zone_id' may be used uninitialized in this function warning. Initialize the zone_id as 0. Its safe to assume that if the code reaches this point it has at least one numa node with memory, so no need for an assertion before init_unavilable_range. Link: https://lkml.kernel.org/r/20210716210336.1114114-1-npache@redhat.com Fixes: 122e093c1734 ("mm/page_alloc: fix memory map initialization for descending nodes") Signed-off-by: Nico Pache Cc: Mike Rapoport Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 71ad97c96075c..04021e37120e6 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -6715,7 +6715,7 @@ static void __init memmap_init(void) { unsigned long start_pfn, end_pfn; unsigned long hole_pfn = 0; - int i, j, zone_id, nid; + int i, j, zone_id = 0, nid; for_each_mem_pfn_range(i, MAX_NUMNODES, &start_pfn, &end_pfn, &nid) { struct pglist_data *node = NODE_DATA(nid);