linux-kernel - [PATCH 2/8] staging: lustre: Enclose complex macros in do-while loops

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Date:   Thu, 21 Dec 2017 16:25:26 +0100
From:   Fabian Huegel <fabian_huegel@....de>
To:     Oleg Drokin <oleg.drokin@...el.com>,
        Andreas Dilger <andreas.dilger@...el.com>,
        James Simmons <jsimmons@...radead.org>,
        Lai Siyao <lai.siyao@...el.com>,
        "John L . Hammond" <john.hammond@...el.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        devel@...verdev.osuosl.org
Cc:     lustre-devel@...ts.lustre.org, linux-kernel@...r.kernel.org,
        linux-kernel@...cs.fau.de,
        Christoph Volkert <linux@...istoph-volkert.de>,
        Fabian Huegel <fabian_huegel@....de>
Subject: [PATCH 2/8] staging: lustre: Enclose complex macros in do-while loops

Some complex multi-line macros were not enclosed by a do-while(0),
so we fixed that.

Signed-off-by: Fabian Huegel <fabian_huegel@....de>
Signed-off-by: Christoph Volkert <linux@...istoph-volkert.de>
---
 drivers/staging/lustre/lustre/include/obd_class.h | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/drivers/staging/lustre/lustre/include/obd_class.h b/drivers/staging/lustre/lustre/include/obd_class.h
index 5c8cf30..dbe8225 100644
--- a/drivers/staging/lustre/lustre/include/obd_class.h
+++ b/drivers/staging/lustre/lustre/include/obd_class.h
@@ -332,22 +332,26 @@ static inline int obd_check_dev_active(struct obd_device *obd)
 	 / sizeof(((struct obd_ops *)(0))->iocontrol))
 
 #define OBD_COUNTER_INCREMENT(obdx, op)			   \
+do {							  \
 	if ((obdx)->obd_stats) {				  \
 		unsigned int coffset;			     \
 		coffset = (unsigned int)((obdx)->obd_cntr_base) + \
 			OBD_COUNTER_OFFSET(op);		   \
 		LASSERT(coffset < (obdx)->obd_stats->ls_num);     \
 		lprocfs_counter_incr((obdx)->obd_stats, coffset); \
-	}
+	}							  \
+} while (0)
 
 #define EXP_COUNTER_INCREMENT(export, op)				    \
+do {								\
 	if ((export)->exp_obd->obd_stats) {			  \
 		unsigned int coffset;					\
 		coffset = (unsigned int)((export)->exp_obd->obd_cntr_base) + \
 			OBD_COUNTER_OFFSET(op);			      \
 		LASSERT(coffset < (export)->exp_obd->obd_stats->ls_num);     \
 		lprocfs_counter_incr((export)->exp_obd->obd_stats, coffset); \
-	}
+	}								\
+} while (0)
 
 #define MD_COUNTER_OFFSET(op)				   \
 	((offsetof(struct md_ops, op) -		   \
@@ -355,15 +359,18 @@ static inline int obd_check_dev_active(struct obd_device *obd)
 	 / sizeof(((struct md_ops *)(0))->getstatus))
 
 #define MD_COUNTER_INCREMENT(obdx, op)			   \
+do {						   \
 	if ((obd)->md_stats) {			   \
 		unsigned int coffset;			    \
 		coffset = (unsigned int)((obdx)->md_cntr_base) + \
 			MD_COUNTER_OFFSET(op);		   \
 		LASSERT(coffset < (obdx)->md_stats->ls_num);     \
 		lprocfs_counter_incr((obdx)->md_stats, coffset); \
-	}
+	}							 \
+} while (0)
 
 #define EXP_MD_COUNTER_INCREMENT(export, op)				 \
+do {								\
 	if ((export)->exp_obd->obd_stats) {				  \
 		unsigned int coffset;					\
 		coffset = (unsigned int)((export)->exp_obd->md_cntr_base) +  \
@@ -373,7 +380,8 @@ static inline int obd_check_dev_active(struct obd_device *obd)
 		if ((export)->exp_md_stats)				  \
 			lprocfs_counter_incr(				\
 				(export)->exp_md_stats, coffset);	    \
-	}
+	}								\
+} while (0)
 
 #define EXP_CHECK_MD_OP(exp, op)				\
 do {							    \
-- 
2.7.4