The patch titled
Subject: mm: page_alloc: fix building error on -Werror=array-compare
has been added to the -mm tree. Its filename is
mm-page_alloc-fix-building-error-on-werror=array-compare.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-page_alloc-fix-building-error-on-werror%3Darray-compare.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-page_alloc-fix-building-error-on-werror%3Darray-compare.patch
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------------------------------------------------------
From: Xiongwei Song <sxwjean@xxxxxxxxx>
Subject: mm: page_alloc: fix building error on -Werror=array-compare
Arthur Marsh reported we would hit the error below when building kernel
with gcc-12:
CC mm/page_alloc.o
mm/page_alloc.c: In function `mem_init_print_info':
mm/page_alloc.c:8173:27: error: comparison between two arrays [-Werror=array-compare]
8173 | if (start <= pos && pos < end && size > adj) \
|
In C++20, the comparision between arrays should be warned.
Link: https://lkml.kernel.org/r/20211125130928.32465-1-sxwjean@xxxxxx
Signed-off-by: Xiongwei Song <sxwjean@xxxxxxxxx>
Reported-by: Arthur Marsh <arthur.marsh@xxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/page_alloc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/mm/page_alloc.c~mm-page_alloc-fix-building-error-on-werror=array-compare
+++ a/mm/page_alloc.c
@@ -8220,7 +8220,7 @@ void __init mem_init_print_info(void)
*/
#define adj_init_size(start, end, size, pos, adj) \
do { \
- if (start <= pos && pos < end && size > adj) \
+ if (&start[0] <= &pos[0] && &pos[0] < &end[0] && size > adj) \
size -= adj; \
} while (0)
_
Patches currently in -mm which might be from sxwjean@xxxxxxxxx are
mm-page_alloc-fix-building-error-on-werror=array-compare.patch
