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mm: page_alloc: fix building error on -Werror=array-compare
commit ca831f29f8
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) \
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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>
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@ -7678,7 +7678,7 @@ void __init mem_init_print_info(const char *str)
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*/
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*/
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#define adj_init_size(start, end, size, pos, adj) \
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#define adj_init_size(start, end, size, pos, adj) \
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do { \
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do { \
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if (start <= pos && pos < end && size > adj) \
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if (&start[0] <= &pos[0] && &pos[0] < &end[0] && size > adj) \
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size -= adj; \
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size -= adj; \
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} while (0)
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} while (0)
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