From: David Laight David.Laight@ACULAB.COM
commit 4ead534fba42fc4fd41163297528d2aa731cd121 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 (cherry picked from commit 4ead534fba42fc4fd41163297528d2aa731cd121) Signed-off-by: SeongJae Park sj@kernel.org --- include/linux/minmax.h | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/include/linux/minmax.h b/include/linux/minmax.h index 501fab582d68..f76b7145fc11 100644 --- a/include/linux/minmax.h +++ b/include/linux/minmax.h @@ -25,8 +25,9 @@ __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 >