diff options
Diffstat (limited to 'ipc/shm.c')
| -rw-r--r-- | ipc/shm.c | 23 |
1 files changed, 13 insertions, 10 deletions
diff --git a/ipc/shm.c b/ipc/shm.c index 4fa6d8fee730..cb858df061d3 100644 --- a/ipc/shm.c +++ b/ipc/shm.c @@ -193,7 +193,7 @@ static void shm_destroy(struct ipc_namespace *ns, struct shmid_kernel *shp) if (!is_file_hugepages(shp->shm_file)) shmem_lock(shp->shm_file, 0, shp->mlock_user); else if (shp->mlock_user) - user_shm_unlock(shp->shm_file->f_path.dentry->d_inode->i_size, + user_shm_unlock(file_inode(shp->shm_file)->i_size, shp->mlock_user); fput (shp->shm_file); security_shm_free(shp); @@ -529,7 +529,7 @@ static int newseg(struct ipc_namespace *ns, struct ipc_params *params) * shmid gets reported as "inode#" in /proc/pid/maps. * proc-ps tools use this. Changing this will break them. */ - file->f_dentry->d_inode->i_ino = shp->shm_perm.id; + file_inode(file)->i_ino = shp->shm_perm.id; ns->shm_tot += numpages; error = shp->shm_perm.id; @@ -678,7 +678,7 @@ static void shm_add_rss_swap(struct shmid_kernel *shp, { struct inode *inode; - inode = shp->shm_file->f_path.dentry->d_inode; + inode = file_inode(shp->shm_file); if (is_file_hugepages(shp->shm_file)) { struct address_space *mapping = inode->i_mapping; @@ -967,11 +967,11 @@ long do_shmat(int shmid, char __user *shmaddr, int shmflg, ulong *raddr, unsigned long flags; unsigned long prot; int acc_mode; - unsigned long user_addr; struct ipc_namespace *ns; struct shm_file_data *sfd; struct path path; fmode_t f_mode; + unsigned long populate = 0; err = -EINVAL; if (shmid < 0) @@ -1042,7 +1042,8 @@ long do_shmat(int shmid, char __user *shmaddr, int shmflg, ulong *raddr, is_file_hugepages(shp->shm_file) ? &shm_file_operations_huge : &shm_file_operations); - if (!file) + err = PTR_ERR(file); + if (IS_ERR(file)) goto out_free; file->private_data = sfd; @@ -1070,13 +1071,15 @@ long do_shmat(int shmid, char __user *shmaddr, int shmflg, ulong *raddr, goto invalid; } - user_addr = do_mmap_pgoff(file, addr, size, prot, flags, 0); - *raddr = user_addr; + addr = do_mmap_pgoff(file, addr, size, prot, flags, 0, &populate); + *raddr = addr; err = 0; - if (IS_ERR_VALUE(user_addr)) - err = (long)user_addr; + if (IS_ERR_VALUE(addr)) + err = (long)addr; invalid: up_write(¤t->mm->mmap_sem); + if (populate) + mm_populate(addr, populate); out_fput: fput(file); @@ -1173,7 +1176,7 @@ SYSCALL_DEFINE1(shmdt, char __user *, shmaddr) (vma->vm_start - addr)/PAGE_SIZE == vma->vm_pgoff) { - size = vma->vm_file->f_path.dentry->d_inode->i_size; + size = file_inode(vma->vm_file)->i_size; do_munmap(mm, vma->vm_start, vma->vm_end - vma->vm_start); /* * We discovered the size of the shm segment, so |