linux-kernel - [PATCH v2] block: drop needless assignment in set_task

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Message-Id: <20211223125300.20691-1-lukas.bulwahn@gmail.com>
Date:   Thu, 23 Dec 2021 13:53:00 +0100
From:   Lukas Bulwahn <lukas.bulwahn@...il.com>
To:     Christoph Hellwig <hch@....de>, Jens Axboe <axboe@...nel.dk>,
        Jan Kara <jack@...e.cz>, linux-block@...r.kernel.org
Cc:     Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        llvm@...ts.linux.dev, kernel-janitors@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Lukas Bulwahn <lukas.bulwahn@...il.com>
Subject: [PATCH v2] block: drop needless assignment in set_task_ioprio()

Commit 5fc11eebb4a9 ("block: open code create_task_io_context in
set_task_ioprio") introduces a needless assignment
'ioc = task->io_context', as the local variable ioc is not further
used before returning.

Even after the further fix, commit a957b61254a7 ("block: fix error in
handling dead task for ioprio setting"), the assignment still remains
needless.

Drop this needless assignment in set_task_ioprio().

This code smell was identified with 'make clang-analyzer'.

Fixes: 5fc11eebb4a9 ("block: open code create_task_io_context in set_task_ioprio")
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@...il.com>
---
 block/blk-ioc.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/block/blk-ioc.c b/block/blk-ioc.c
index 71c3a933cf16..11f49f78db32 100644
--- a/block/blk-ioc.c
+++ b/block/blk-ioc.c
@@ -284,12 +284,10 @@ int set_task_ioprio(struct task_struct *task, int ioprio)
 			kmem_cache_free(iocontext_cachep, ioc);
 			goto out;
 		}
-		if (task->io_context) {
+		if (task->io_context)
 			kmem_cache_free(iocontext_cachep, ioc);
-			ioc = task->io_context;
-		} else {
+		else
 			task->io_context = ioc;
-		}
 	}
 	task->io_context->ioprio = ioprio;
 out:
-- 
2.17.1