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mm/page_alloc.c: fix 'zone_id' may be used uninitialized in this function warning

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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: 122e093c17 ("mm/page_alloc: fix memory map initialization for descending nodes")
Signed-off-by: Nico Pache <npache@redhat.com>
Cc: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Nico Pache 2021-09-02 14:58:08 -07:00 committed by Linus Torvalds
parent 08678804e0
commit b346075fcf
1 changed files with 1 additions and 1 deletions
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2
mm/page_alloc.c
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@ -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);