The patch titled
Subject: mm/page_alloc.c: fix 'zone_id' may be used uninitialized in this function warning
has been added to the -mm tree. Its filename is
fix-zone_id-may-be-used-uninitialized-in-this-function-warning.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/fix-zone_id-may-be-used-uninitialized-in-this-function-warning.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/fix-zone_id-may-be-used-uninitialized-in-this-function-warning.patch
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------------------------------------------------------
From: Nico Pache <npache@xxxxxxxxxx>
Subject: 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@xxxxxxxxxx
Fixes: 122e093c1734 ("mm/page_alloc: fix memory map initialization for descending nodes")
Signed-off-by: Nico Pache <npache@xxxxxxxxxx>
Cc: Mike Rapoport <rppt@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/page_alloc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/mm/page_alloc.c~fix-zone_id-may-be-used-uninitialized-in-this-function-warning
+++ a/mm/page_alloc.c
@@ -6714,7 +6714,7 @@ 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);
_
Patches currently in -mm which might be from npache@xxxxxxxxxx are
fix-zone_id-may-be-used-uninitialized-in-this-function-warning.patch
