This is a note to let you know that I've just added the patch titled
minmax: allow comparisons of 'int' against 'unsigned char/short'
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
minmax-allow-comparisons-of-int-against-unsigned-char-short.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 4ead534fba42fc4fd41163297528d2aa731cd121 Mon Sep 17 00:00:00 2001
From: David Laight <David.Laight@xxxxxxxxxx>
Date: Mon, 18 Sep 2023 08:18:40 +0000
Subject: minmax: allow comparisons of 'int' against 'unsigned char/short'
From: David Laight <David.Laight@xxxxxxxxxx>
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@xxxxxxxxxxxxxxxx
Signed-off-by: David Laight <david.laight@xxxxxxxxxx>
Cc: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Cc: Jason A. Donenfeld <Jason@xxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
include/linux/minmax.h | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -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 >
Patches currently in stable-queue which might be from David.Laight@xxxxxxxxxx are
queue-6.6/minmax-allow-min-max-clamp-if-the-arguments-have-the-same-signedness.patch
queue-6.6/minmax-add-umin-a-b-and-umax-a-b.patch
queue-6.6/minmax-relax-check-to-allow-comparison-between-unsigned-arguments-and-signed-constants.patch
queue-6.6/minmax-fix-indentation-of-__cmp_once-and-__clamp_once.patch
queue-6.6/minmax-allow-comparisons-of-int-against-unsigned-char-short.patch
