linux-kernel - [PATCH] ipc/sem: Remove redundant assignments

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Date:   Sat,  9 Apr 2022 12:19:31 +0200
From:   Michal Orzel <michalorzel.eng@...il.com>
To:     Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Tom Rix <trix@...hat.com>
Cc:     Michal Orzel <michalorzel.eng@...il.com>,
        linux-kernel@...r.kernel.org, llvm@...ts.linux.dev
Subject: [PATCH] ipc/sem: Remove redundant assignments

Get rid of redundant assignments which end up in values not being
read either because they are overwritten or the function ends.

Reported by clang-tidy [deadcode.DeadStores]

Signed-off-by: Michal Orzel <michalorzel.eng@...il.com>
---
 ipc/sem.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/ipc/sem.c b/ipc/sem.c
index 0dbdb98fdf2d..38ef91a63edd 100644
--- a/ipc/sem.c
+++ b/ipc/sem.c
@@ -766,7 +766,6 @@ static int perform_atomic_semop(struct sem_array *sma, struct sem_queue *q)
 	for (sop = sops; sop < sops + nsops; sop++) {
 		curr = &sma->sems[sop->sem_num];
 		sem_op = sop->sem_op;
-		result = curr->semval;
 
 		if (sop->sem_flg & SEM_UNDO) {
 			int undo = un->semadj[sop->sem_num] - sem_op;
@@ -1430,7 +1429,6 @@ static int semctl_main(struct ipc_namespace *ns, int semid, int semnum,
 	if (err)
 		goto out_rcu_wakeup;
 
-	err = -EACCES;
 	switch (cmd) {
 	case GETALL:
 	{
-- 
2.25.1