From: David Laight <David.Laight@ACULAB.COM>
To: "'linux-kernel@vger.kernel.org'" <linux-kernel@vger.kernel.org>,
"'Andy Shevchenko'" <andriy.shevchenko@linux.intel.com>,
'Andrew Morton' <akpm@linux-foundation.org>,
"'Matthew Wilcox (Oracle)'" <willy@infradead.org>,
'Christoph Hellwig' <hch@infradead.org>,
"'Jason A. Donenfeld'" <Jason@zx2c4.com>
Subject: [PATCH next resend 4/5] minmax: Allow comparisons of 'int' against 'unsigned char/short'.
Date: Tue, 25 Jul 2023 11:53:22 +0000 [thread overview]
Message-ID: <a3309fcd947a4fb3826f1e8b8b9da585@AcuMS.aculab.com> (raw)
In-Reply-To: <caa84582f9414de895ac6c4fe2b53489@AcuMS.aculab.com>
Since 'unsigned char/short' get promoted to 'signed int' it is
safe to compare them against an 'int' value.
Signed-off-by: David Laight <david.laight@aculab.com>
---
Resend as reply to 0/5
include/linux/minmax.h | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index 179034479d5e..baffbe5c855d 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -16,7 +16,8 @@
* allocation usage).
*/
#define __types_ok(x, y) \
- (is_signed_type(typeof(x)) == is_signed_type(typeof(y)))
+ (is_signed_type(typeof(x)) == is_signed_type(typeof(y)) || \
+ is_signed_type(typeof((x) + 0)) == is_signed_type(typeof((y) + 0)))
#define __cmp_op_min <
#define __cmp_op_max >
--
2.17.1
-
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Registration No: 1397386 (Wales)
next prev parent reply other threads:[~2023-07-25 11:54 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-07-25 10:00 [PATCH next 0/5] minmax: Relax type checks in min() and max() David Laight
2023-07-25 10:38 ` 'Andy Shevchenko'
2023-07-25 11:17 ` David Laight
2023-07-25 11:48 ` [PATCH next resend 1/5] minmax: Add min_unsigned(a, b) and max_unsigned(a, b) David Laight
2023-07-25 12:38 ` Matthew Wilcox
2023-07-25 13:20 ` David Laight
2023-07-25 11:51 ` [PATCH next resend 2/5] minmax: Allow min()/max()/clamp() if the arguments have the same signedness David Laight
2023-07-25 18:02 ` kernel test robot
2023-07-25 18:33 ` kernel test robot
2023-07-26 9:19 ` David Laight
[not found] ` <86ila7t30q.wl-maz@kernel.org>
2023-07-26 10:25 ` David Laight
2023-07-25 11:52 ` [PATCH next resend 3/5] minmax: Fix indentation of __cmp_once() and __clamp_once() David Laight
2023-07-25 11:53 ` David Laight [this message]
2023-07-25 11:54 ` [PATCH next resend 5/5] minmax: Relax check to allow comparison between int and small unsigned constants David Laight
2023-07-25 19:36 ` kernel test robot
2023-07-26 9:29 ` David Laight
2023-07-27 5:20 ` kernel test robot
2023-07-28 7:15 ` kernel test robot
2023-07-28 8:08 ` kernel test robot
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