linux-kernel - [PATCH v2 1/5] block/badblocks: Remove redundant assignments

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Message-Id: <20220412171651.19812-1-michalorzel.eng@gmail.com>
Date:   Tue, 12 Apr 2022 19:16:47 +0200
From:   Michal Orzel <michalorzel.eng@...il.com>
To:     Jens Axboe <axboe@...nel.dk>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Tom Rix <trix@...hat.com>
Cc:     Michal Orzel <michalorzel.eng@...il.com>,
        linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        llvm@...ts.linux.dev
Subject: [PATCH v2 1/5] block/badblocks: Remove redundant assignments

Get rid of redundant assignments to a variable sectors from functions
badblocks_check and badblocks_clear. This variable, that is a function
parameter, is being assigned a value that is never read until the end of
function.

Reported by clang-tidy [deadcode.DeadStores]

Signed-off-by: Michal Orzel <michalorzel.eng@...il.com>
---
Changes since v1:
-move the change into a separate patch
-add analysis
---
 block/badblocks.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/block/badblocks.c b/block/badblocks.c
index d39056630d9c..3afb550c0f7b 100644
--- a/block/badblocks.c
+++ b/block/badblocks.c
@@ -65,7 +65,6 @@ int badblocks_check(struct badblocks *bb, sector_t s, int sectors,
 		s >>= bb->shift;
 		target += (1<<bb->shift) - 1;
 		target >>= bb->shift;
-		sectors = target - s;
 	}
 	/* 'target' is now the first block after the bad range */
 
@@ -345,7 +344,6 @@ int badblocks_clear(struct badblocks *bb, sector_t s, int sectors)
 		s += (1<<bb->shift) - 1;
 		s >>= bb->shift;
 		target >>= bb->shift;
-		sectors = target - s;
 	}
 
 	write_seqlock_irq(&bb->lock);
-- 
2.25.1