From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Fri, 9 Jan 2009 20:49:50 +0000 (-0800)
Subject: x86: make 'constant_test_bit()' take an unsigned bit number
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=c4295fbb6048d85f0b41c5ced5cbf63f6811c46c;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

x86: make 'constant_test_bit()' take an unsigned bit number

Ingo noticed that using signed arithmetic seems to confuse the gcc
inliner, and make it potentially decide that it's all too complicated.

(Yeah, yeah, it's a constant. It's always positive. Still..)

Based-on: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/arch/x86/include/asm/bitops.h b/arch/x86/include/asm/bitops.h
index 9fa9dcdf344b..e02a359d2aa5 100644
--- a/arch/x86/include/asm/bitops.h
+++ b/arch/x86/include/asm/bitops.h
@@ -300,7 +300,7 @@ static inline int test_and_change_bit(int nr, volatile unsigned long *addr)
 	return oldbit;
 }
 
-static inline int constant_test_bit(int nr, const volatile unsigned long *addr)
+static inline int constant_test_bit(unsigned int nr, const volatile unsigned long *addr)
 {
 	return ((1UL << (nr % BITS_PER_LONG)) &
 		(((unsigned long *)addr)[nr / BITS_PER_LONG])) != 0;