BUG_ON() Conversion in ipc/shm.c

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>
Signed-off-by: Adrian Bunk <bunk@stusta.de>

diff --git a/ipc/shm.c b/ipc/shm.c
index f806a2e..6b0c9af 100644 (file)
--- a/ipc/shm.c
+++ b/ipc/shm.c
@@ -91,8 +91,8 @@ static inline int shm_addid(struct shmid_kernel *shp)
 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++;
@@ -142,8 +142,8 @@ static void shm_close (struct vm_area_struct *shmd)
 
        mutex_lock(&shm_ids.mutex);
        /* 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--;
@@ -283,8 +283,7 @@ asmlinkage long sys_shmget (key_t key, size_t size, int shmflg)
                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))
@@ -774,8 +773,8 @@ invalid:
        up_write(&current->mm->mmap_sem);
 
        mutex_lock(&shm_ids.mutex);
-       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)