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From: Eric Sesterhenn / snakebyte <snakebyte@gmx.de>
To: kernel-janitors@vger.kernel.org
Subject: [KJ] [Patch 3/4] BUG_ON() Conversion in ipc/shm.c
Date: Fri, 27 Jan 2006 12:49:11 +0000	[thread overview]
Message-ID: <1138366151.15909.8.camel@alice> (raw)

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hi, 

this changes if() BUG(); constructs to BUG_ON() which is
cleaner, contains unlikely() and can better optimized away.

Signed-off-by: Eric Sesterhenn <snakebyte@gmx.de>

--- linux-2.6.16-rc1-git4/ipc/shm.c.orig	2006-01-27 11:11:02.000000000 +0100
+++ linux-2.6.16-rc1-git4/ipc/shm.c	2006-01-27 11:13:11.000000000 +0100
@@ -90,8 +90,8 @@ static inline int shm_addid(struct shmid
 static inline void shm_inc (int id) {
 	struct shmid_kernel *shp;
 
-	if(!(shp = shm_lock(id)))
-		BUG();
+	shp = shm_lock(id);
+	BUG_ON(!shp);
 	shp->shm_atim = get_seconds();
 	shp->shm_lprid = current->tgid;
 	shp->shm_nattch++;
@@ -141,8 +141,8 @@ static void shm_close (struct vm_area_st
 
 	down (&shm_ids.sem);
 	/* remove from the list of attaches of the shm segment */
-	if(!(shp = shm_lock(id)))
-		BUG();
+	shp = shm_lock(id);
+	BUG_ON(!shp);
 	shp->shm_lprid = current->tgid;
 	shp->shm_dtim = get_seconds();
 	shp->shm_nattch--;
@@ -282,8 +282,7 @@ asmlinkage long sys_shmget (key_t key, s
 		err = -EEXIST;
 	} else {
 		shp = shm_lock(id);
-		if(shp==NULL)
-			BUG();
+		BUG_ON(shp==NULL);
 		if (shp->shm_segsz < size)
 			err = -EINVAL;
 		else if (ipcperms(&shp->shm_perm, shmflg))
@@ -772,8 +771,8 @@ invalid:
 	up_write(&current->mm->mmap_sem);
 
 	down (&shm_ids.sem);
-	if(!(shp = shm_lock(shmid)))
-		BUG();
+	shp = shm_lock(shmid);
+	BUG_ON(!shp);
 	shp->shm_nattch--;
 	if(shp->shm_nattch == 0 &&
 	   shp->shm_perm.mode & SHM_DEST)



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             reply	other threads:[~2006-01-27 12:49 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-01-27 12:49 Eric Sesterhenn / snakebyte [this message]
2006-01-27 12:49 ` [KJ] [Patch 3/4] BUG_ON() Conversion in ipc/util.c Eric Sesterhenn / snakebyte

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