linux-kernel - Re: [PATCH v2] jfs: turn diLog(), dataLog() and txLog() into void functions

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Date:   Mon, 8 Feb 2021 09:05:03 -0600
From:   Dave Kleikamp <dave.kleikamp@...cle.com>
To:     Yang Li <yang.lee@...ux.alibaba.com>, shaggy@...nel.org
Cc:     jfs-discussion@...ts.sourceforge.net, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] jfs: turn diLog(), dataLog() and txLog() into void
 functions

On 2/7/21 2:32 AM, Yang Li wrote:
> These functions always return '0' and no callers use the return value.
> So make it a void function.
> 
> This eliminates the following coccicheck warning:
> ./fs/jfs/jfs_txnmgr.c:1365:5-7: Unneeded variable: "rc". Return "0" on
> line 1414
> ./fs/jfs/jfs_txnmgr.c:1422:5-7: Unneeded variable: "rc". Return "0" on
> line 1527
> 
> Reported-by: Abaci Robot <abaci@...ux.alibaba.com>
> Signed-off-by: Yang Li <yang.lee@...ux.alibaba.com>
> ---
> 
> Changes in v2
> -turn functions forward references to void type.
> 
>   fs/jfs/jfs_txnmgr.c | 32 +++++++++++++++-----------------
>   1 file changed, 15 insertions(+), 17 deletions(-)

This patch missed fixing a call to txLog() which did check the return value. I took the liberty of fixing it here.


jfs: turn diLog(), dataLog() and txLog() into void functions

These functions always return '0' and no callers use the return value.
So make it a void function.

This eliminates the following coccicheck warning:
./fs/jfs/jfs_txnmgr.c:1365:5-7: Unneeded variable: "rc". Return "0" on
line 1414
./fs/jfs/jfs_txnmgr.c:1422:5-7: Unneeded variable: "rc". Return "0" on
line 1527

Reported-by: Abaci Robot <abaci@...ux.alibaba.com>
Signed-off-by: Yang Li <yang.lee@...ux.alibaba.com>
Signed-off-by: Dave Kleikamp <dave.kleikamp@...cle.com>
---
  fs/jfs/jfs_txnmgr.c | 35 ++++++++++++++++-------------------
  1 file changed, 16 insertions(+), 19 deletions(-)

diff --git a/fs/jfs/jfs_txnmgr.c b/fs/jfs/jfs_txnmgr.c
index dca8edd2378c..053295cd7bc6 100644
--- a/fs/jfs/jfs_txnmgr.c
+++ b/fs/jfs/jfs_txnmgr.c
@@ -148,10 +148,10 @@ static struct {
  /*
   * forward references
   */
-static int diLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
-		struct tlock * tlck, struct commit * cd);
-static int dataLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
-		struct tlock * tlck);
+static void diLog(struct jfs_log *log, struct tblock *tblk, struct lrd *lrd,
+		struct tlock *tlck, struct commit *cd);
+static void dataLog(struct jfs_log *log, struct tblock *tblk, struct lrd *lrd,
+		struct tlock *tlck);
  static void dtLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
  		struct tlock * tlck);
  static void mapLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
@@ -159,8 +159,8 @@ static void mapLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
  static void txAllocPMap(struct inode *ip, struct maplock * maplock,
  		struct tblock * tblk);
  static void txForce(struct tblock * tblk);
-static int txLog(struct jfs_log * log, struct tblock * tblk,
-		struct commit * cd);
+static void txLog(struct jfs_log *log, struct tblock *tblk,
+		struct commit *cd);
  static void txUpdateMap(struct tblock * tblk);
  static void txRelease(struct tblock * tblk);
  static void xtLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
@@ -1256,8 +1256,7 @@ int txCommit(tid_t tid,		/* transaction identifier */
  	 *
  	 * txUpdateMap() resets XAD_NEW in XAD.
  	 */
-	if ((rc = txLog(log, tblk, &cd)))
-		goto TheEnd;
+	txLog(log, tblk, &cd);
   	/*
  	 * Ensure that inode isn't reused before
@@ -1365,9 +1364,8 @@ int txCommit(tid_t tid,		/* transaction identifier */
   *
   * RETURN :
   */
-static int txLog(struct jfs_log * log, struct tblock * tblk, struct commit * cd)
+static void txLog(struct jfs_log *log, struct tblock *tblk, struct commit *cd)
  {
-	int rc = 0;
  	struct inode *ip;
  	lid_t lid;
  	struct tlock *tlck;
@@ -1414,7 +1412,7 @@ static int txLog(struct jfs_log * log, struct tblock * tblk, struct commit * cd)
  		}
  	}
  -	return rc;
+	return;
  }
   /*
@@ -1422,10 +1420,9 @@ static int txLog(struct jfs_log * log, struct tblock * tblk, struct commit * cd)
   *
   * function:	log inode tlock and format maplock to update bmap;
   */
-static int diLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
-		 struct tlock * tlck, struct commit * cd)
+static void diLog(struct jfs_log *log, struct tblock *tblk, struct lrd *lrd,
+		 struct tlock *tlck, struct commit *cd)
  {
-	int rc = 0;
  	struct metapage *mp;
  	pxd_t *pxd;
  	struct pxd_lock *pxdlock;
@@ -1527,7 +1524,7 @@ static int diLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
  	}
  #endif				/* _JFS_WIP */
  -	return rc;
+	return;
  }
   /*
@@ -1535,8 +1532,8 @@ static int diLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
   *
   * function:	log data tlock
   */
-static int dataLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
-	    struct tlock * tlck)
+static void dataLog(struct jfs_log *log, struct tblock *tblk, struct lrd *lrd,
+	    struct tlock *tlck)
  {
  	struct metapage *mp;
  	pxd_t *pxd;
@@ -1562,7 +1559,7 @@ static int dataLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
  		metapage_homeok(mp);
  		discard_metapage(mp);
  		tlck->mp = NULL;
-		return 0;
+		return;
  	}
   	PXDaddress(pxd, mp->index);
@@ -1573,7 +1570,7 @@ static int dataLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
  	/* mark page as homeward bound */
  	tlck->flag |= tlckWRITEPAGE;
  -	return 0;
+	return;
  }
   /*
-- 
2.30.0