From: Eliav Farber <farbere@amazon.com>
To: <luc.vanoostenryck@gmail.com>, <rostedt@goodmis.org>,
<mingo@redhat.com>, <akpm@linux-foundation.org>,
<gregkh@linuxfoundation.org>, <sj@kernel.org>,
<David.Laight@ACULAB.COM>, <Jason@zx2c4.com>,
<andriy.shevchenko@linux.intel.com>, <bvanassche@acm.org>,
<keescook@chromium.org>, <linux-sparse@vger.kernel.org>,
<linux-kernel@vger.kernel.org>
Cc: <jonnyc@amazon.com>, <farbere@amazon.com>,
<stable@vger.kernel.org>, Christoph Hellwig <hch@infradead.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
"Matthew Wilcox (Oracle)" <willy@infradead.org>
Subject: [PATCH 6/7 5.10.y] minmax: allow comparisons of 'int' against 'unsigned char/short'
Date: Tue, 16 Sep 2025 21:31:49 +0000 [thread overview]
Message-ID: <20250916213149.9637-1-farbere@amazon.com> (raw)
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Eliav Farber <farbere@amazon.com>
---
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 >
--
2.47.3
reply other threads:[~2025-09-16 21:32 UTC|newest]
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