diff options
author | Dmitry Torokhov <dtor_core@ameritech.net> | 2006-04-29 01:11:23 -0400 |
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committer | Dmitry Torokhov <dtor_core@ameritech.net> | 2006-04-29 01:11:23 -0400 |
commit | 7b7e394185014e0f3bd8989cac937003f20ef9ce (patch) | |
tree | 3beda5f979bba0aa9822534e239cf1b45f3be69c /ipc/shm.c | |
parent | ddc5d3414593e4d7ad7fbd33e7f7517fcc234544 (diff) | |
parent | 693f7d362055261882659475d2ef022e32edbff1 (diff) |
Merge rsync://rsync.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Diffstat (limited to 'ipc/shm.c')
-rw-r--r-- | ipc/shm.c | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/ipc/shm.c b/ipc/shm.c index f806a2e314e..1c2faf62bc7 100644 --- 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--; @@ -162,6 +162,8 @@ static int shm_mmap(struct file * file, struct vm_area_struct * vma) ret = shmem_mmap(file, vma); if (ret == 0) { vma->vm_ops = &shm_vm_ops; + if (!(vma->vm_flags & VM_WRITE)) + vma->vm_flags &= ~VM_MAYWRITE; shm_inc(file->f_dentry->d_inode->i_ino); } @@ -283,8 +285,7 @@ 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 +775,8 @@ invalid: up_write(¤t->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) |