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minmax: allow comparisons of 'int' against 'unsigned char/short'

Since 'unsigned char/short' get promoted to 'signed int' it is safe to
compare them against an 'int' value.

Link: https://lkml.kernel.org/r/8732ef5f809c47c28a7be47c938b28d4@AcuMS.aculab.com
Signed-off-by: David Laight <david.laight@aculab.com>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Jason A. Donenfeld <Jason@zx2c4.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

authored by

David Laight and committed by
Andrew Morton 4ead534f f4b84b2f

+3 -2
+3 -2
include/linux/minmax.h
··· 26 26 __builtin_choose_expr(__is_constexpr(is_signed_type(typeof(x))), \ 27 27 is_signed_type(typeof(x)), 0) 28 28 29 - #define __types_ok(x, y) \ 30 - (__is_signed(x) == __is_signed(y)) 29 + #define __types_ok(x, y) \ 30 + (__is_signed(x) == __is_signed(y) || \ 31 + __is_signed((x) + 0) == __is_signed((y) + 0)) 31 32 32 33 #define __cmp_op_min < 33 34 #define __cmp_op_max >