Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 5.4 02/62] mm: page_alloc: fix building error on -Werror=array-compare | Date | Tue, 26 Apr 2022 10:20:42 +0200 |
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From: Xiongwei Song <sxwjean@gmail.com>
commit ca831f29f8f25c97182e726429b38c0802200c8f upstream.
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@me.com Signed-off-by: Xiongwei Song <sxwjean@gmail.com> Reported-by: Arthur Marsh <arthur.marsh@internode.on.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: Khem Raj <raj.khem@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- mm/page_alloc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -7588,7 +7588,7 @@ void __init mem_init_print_info(const ch */ #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)
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