linux-kernel - [PATCH] ARC: bitops: Remove unecessary operation and value

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Message-Id: <21124fbdd2ebfe150cc750f673a31e89d6fe5752.1603314740.git.gustavo.pimentel@synopsys.com>
Date:   Wed, 21 Oct 2020 23:12:20 +0200
From:   Gustavo Pimentel <Gustavo.Pimentel@...opsys.com>
To:     Vineet Gupta <Vineet.Gupta1@...opsys.com>
Cc:     Joao Pinto <Joao.Pinto@...opsys.com>,
        Gustavo Pimentel <Gustavo.Pimentel@...opsys.com>,
        linux-snps-arc@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH] ARC: bitops: Remove unecessary operation and value

The 1-bit shift rotation to the left on x variable located on
4   last if statement can be removed because the computed value is will
not be used afront.

Signed-off-by: Gustavo Pimentel <gustavo.pimentel@...opsys.com>
---
 arch/arc/include/asm/bitops.h | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/arch/arc/include/asm/bitops.h b/arch/arc/include/asm/bitops.h
index 50eb3f6..8cddddc 100644
--- a/arch/arc/include/asm/bitops.h
+++ b/arch/arc/include/asm/bitops.h
@@ -297,10 +297,8 @@ static inline int constant_fls(unsigned int x)
 		x <<= 2;
 		r -= 2;
 	}
-	if (!(x & 0x80000000u)) {
-		x <<= 1;
+	if (!(x & 0x80000000u))
 		r -= 1;
-	}
 	return r;
 }
 
-- 
2.7.4