diff options
Diffstat (limited to 'fs/proc/base.c')
| -rw-r--r-- | fs/proc/base.c | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/fs/proc/base.c b/fs/proc/base.c index fb34f88..a170450 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -103,7 +103,9 @@ enum pid_directory_inos { PROC_TGID_NUMA_MAPS, PROC_TGID_MOUNTS, PROC_TGID_WCHAN, +#ifdef CONFIG_MMU PROC_TGID_SMAPS, +#endif #ifdef CONFIG_SCHEDSTATS PROC_TGID_SCHEDSTAT, #endif @@ -141,7 +143,9 @@ enum pid_directory_inos { PROC_TID_NUMA_MAPS, PROC_TID_MOUNTS, PROC_TID_WCHAN, +#ifdef CONFIG_MMU PROC_TID_SMAPS, +#endif #ifdef CONFIG_SCHEDSTATS PROC_TID_SCHEDSTAT, #endif @@ -195,7 +199,9 @@ static struct pid_entry tgid_base_stuff[] = { E(PROC_TGID_ROOT, "root", S_IFLNK|S_IRWXUGO), E(PROC_TGID_EXE, "exe", S_IFLNK|S_IRWXUGO), E(PROC_TGID_MOUNTS, "mounts", S_IFREG|S_IRUGO), +#ifdef CONFIG_MMU E(PROC_TGID_SMAPS, "smaps", S_IFREG|S_IRUGO), +#endif #ifdef CONFIG_SECURITY E(PROC_TGID_ATTR, "attr", S_IFDIR|S_IRUGO|S_IXUGO), #endif @@ -235,7 +241,9 @@ static struct pid_entry tid_base_stuff[] = { E(PROC_TID_ROOT, "root", S_IFLNK|S_IRWXUGO), E(PROC_TID_EXE, "exe", S_IFLNK|S_IRWXUGO), E(PROC_TID_MOUNTS, "mounts", S_IFREG|S_IRUGO), +#ifdef CONFIG_MMU E(PROC_TID_SMAPS, "smaps", S_IFREG|S_IRUGO), +#endif #ifdef CONFIG_SECURITY E(PROC_TID_ATTR, "attr", S_IFDIR|S_IRUGO|S_IXUGO), #endif @@ -343,7 +351,8 @@ static int proc_root_link(struct inode *inode, struct dentry **dentry, struct vf /* Same as proc_root_link, but this addionally tries to get fs from other * threads in the group */ -static int proc_task_root_link(struct inode *inode, struct dentry **dentry, struct vfsmount **mnt) +static int proc_task_root_link(struct inode *inode, struct dentry **dentry, + struct vfsmount **mnt) { struct fs_struct *fs; int result = -ENOENT; @@ -357,9 +366,10 @@ static int proc_task_root_link(struct inode *inode, struct dentry **dentry, stru } else { /* Try to get fs from other threads */ task_unlock(leader); - struct task_struct *task = leader; read_lock(&tasklist_lock); - if (pid_alive(task)) { + if (pid_alive(leader)) { + struct task_struct *task = leader; + while ((task = next_thread(task)) != leader) { task_lock(task); fs = task->fs; @@ -628,6 +638,7 @@ static struct file_operations proc_numa_maps_operations = { }; #endif +#ifdef CONFIG_MMU extern struct seq_operations proc_pid_smaps_op; static int smaps_open(struct inode *inode, struct file *file) { @@ -646,6 +657,7 @@ static struct file_operations proc_smaps_operations = { .llseek = seq_lseek, .release = seq_release, }; +#endif extern struct seq_operations mounts_op; static int mounts_open(struct inode *inode, struct file *file) @@ -1679,10 +1691,12 @@ static struct dentry *proc_pident_lookup(struct inode *dir, case PROC_TGID_MOUNTS: inode->i_fop = &proc_mounts_operations; break; +#ifdef CONFIG_MMU case PROC_TID_SMAPS: case PROC_TGID_SMAPS: inode->i_fop = &proc_smaps_operations; break; +#endif #ifdef CONFIG_SECURITY case PROC_TID_ATTR: inode->i_nlink = 2; |