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

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commit 4ead534fba upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
David Laight 2023-09-18 08:18:40 +00:00 committed by Greg Kroah-Hartman
parent b0c7fd162f
commit 701405f53d
1 changed files with 3 additions and 2 deletions
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5
include/linux/minmax.h
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@ -26,8 +26,9 @@
__builtin_choose_expr(__is_constexpr(is_signed_type(typeof(x))), \
is_signed_type(typeof(x)), 0)
#define __types_ok(x, y) \
(__is_signed(x) == __is_signed(y))
#define __types_ok(x, y) \
(__is_signed(x) == __is_signed(y) || \
__is_signed((x) + 0) == __is_signed((y) + 0))
#define __cmp_op_min <
#define __cmp_op_max >