diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2015-07-01 17:47:51 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-07-01 17:47:51 -0700 |
commit | 2d01eedf1d14432f4db5388a49dc5596a8c5bd02 (patch) | |
tree | 646525acc0475b2899827c1bfbd25f05ec1b8092 /fs/devpts/inode.c | |
parent | 6ac15baacb6ecd87c66209627753b96ded3b4515 (diff) | |
parent | abdd4a7025282fbe3737e1bcb5f51afc8d8ea1b8 (diff) |
Merge branch 'akpm' (patches from Andrew)
Merge third patchbomb from Andrew Morton:
- the rest of MM
- scripts/gdb updates
- ipc/ updates
- lib/ updates
- MAINTAINERS updates
- various other misc things
* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (67 commits)
genalloc: rename of_get_named_gen_pool() to of_gen_pool_get()
genalloc: rename dev_get_gen_pool() to gen_pool_get()
x86: opt into HAVE_COPY_THREAD_TLS, for both 32-bit and 64-bit
MAINTAINERS: add zpool
MAINTAINERS: BCACHE: Kent Overstreet has changed email address
MAINTAINERS: move Jens Osterkamp to CREDITS
MAINTAINERS: remove unused nbd.h pattern
MAINTAINERS: update brcm gpio filename pattern
MAINTAINERS: update brcm dts pattern
MAINTAINERS: update sound soc intel patterns
MAINTAINERS: remove website for paride
MAINTAINERS: update Emulex ocrdma email addresses
bcache: use kvfree() in various places
libcxgbi: use kvfree() in cxgbi_free_big_mem()
target: use kvfree() in session alloc and free
IB/ehca: use kvfree() in ipz_queue_{cd}tor()
drm/nouveau/gem: use kvfree() in u_free()
drm: use kvfree() in drm_free_large()
cxgb4: use kvfree() in t4_free_mem()
cxgb3: use kvfree() in cxgb_free_mem()
...
Diffstat (limited to 'fs/devpts/inode.c')
-rw-r--r-- | fs/devpts/inode.c | 31 |
1 files changed, 24 insertions, 7 deletions
diff --git a/fs/devpts/inode.c b/fs/devpts/inode.c index add566303c68..c35ffdc12bba 100644 --- a/fs/devpts/inode.c +++ b/fs/devpts/inode.c @@ -142,6 +142,8 @@ static inline struct super_block *pts_sb_from_inode(struct inode *inode) if (inode->i_sb->s_magic == DEVPTS_SUPER_MAGIC) return inode->i_sb; #endif + if (!devpts_mnt) + return NULL; return devpts_mnt->mnt_sb; } @@ -525,10 +527,14 @@ static struct file_system_type devpts_fs_type = { int devpts_new_index(struct inode *ptmx_inode) { struct super_block *sb = pts_sb_from_inode(ptmx_inode); - struct pts_fs_info *fsi = DEVPTS_SB(sb); + struct pts_fs_info *fsi; int index; int ida_ret; + if (!sb) + return -ENODEV; + + fsi = DEVPTS_SB(sb); retry: if (!ida_pre_get(&fsi->allocated_ptys, GFP_KERNEL)) return -ENOMEM; @@ -584,11 +590,18 @@ struct inode *devpts_pty_new(struct inode *ptmx_inode, dev_t device, int index, struct dentry *dentry; struct super_block *sb = pts_sb_from_inode(ptmx_inode); struct inode *inode; - struct dentry *root = sb->s_root; - struct pts_fs_info *fsi = DEVPTS_SB(sb); - struct pts_mount_opts *opts = &fsi->mount_opts; + struct dentry *root; + struct pts_fs_info *fsi; + struct pts_mount_opts *opts; char s[12]; + if (!sb) + return ERR_PTR(-ENODEV); + + root = sb->s_root; + fsi = DEVPTS_SB(sb); + opts = &fsi->mount_opts; + inode = new_inode(sb); if (!inode) return ERR_PTR(-ENOMEM); @@ -676,12 +689,16 @@ static int __init init_devpts_fs(void) struct ctl_table_header *table; if (!err) { + struct vfsmount *mnt; + table = register_sysctl_table(pty_root_table); - devpts_mnt = kern_mount(&devpts_fs_type); - if (IS_ERR(devpts_mnt)) { - err = PTR_ERR(devpts_mnt); + mnt = kern_mount(&devpts_fs_type); + if (IS_ERR(mnt)) { + err = PTR_ERR(mnt); unregister_filesystem(&devpts_fs_type); unregister_sysctl_table(table); + } else { + devpts_mnt = mnt; } } return err; |