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authorEric W. Biederman <ebiederm@xmission.com>2010-07-10 15:23:34 -0700
committerEric W. Biederman <ebiederm@xmission.com>2012-11-19 03:09:35 -0800
commitae06c7c83fc6e97ba247a261921c101960f3d28f (patch)
treef7328e9b5aadaae1c6d4886147249d38b35de277 /fs/proc
parente656d8a6f7fdf7612d2f5771f0ddfca9487f59d9 (diff)
downloadlinux-ae06c7c83fc6e97ba247a261921c101960f3d28f.tar.bz2
procfs: Don't cache a pid in the root inode.
Now that we have s_fs_info pointing to our pid namespace the original reason for the proc root inode having a struct pid is gone. Caching a pid in the root inode has led to some complicated code. Now that we don't need the struct pid, just remove it. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Diffstat (limited to 'fs/proc')
-rw-r--r--fs/proc/base.c11
-rw-r--r--fs/proc/root.c8
2 files changed, 1 insertions, 18 deletions
diff --git a/fs/proc/base.c b/fs/proc/base.c
index cbe454e94af8..6177fc238fdb 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -2714,19 +2714,12 @@ static int fake_filldir(void *buf, const char *name, int namelen,
/* for the /proc/ directory itself, after non-process stuff has been done */
int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir)
{
- unsigned int nr;
- struct task_struct *reaper;
struct tgid_iter iter;
struct pid_namespace *ns;
filldir_t __filldir;
if (filp->f_pos >= PID_MAX_LIMIT + TGID_OFFSET)
- goto out_no_task;
- nr = filp->f_pos - FIRST_PROCESS_ENTRY;
-
- reaper = get_proc_task(filp->f_path.dentry->d_inode);
- if (!reaper)
- goto out_no_task;
+ goto out;
ns = filp->f_dentry->d_sb->s_fs_info;
iter.task = NULL;
@@ -2747,8 +2740,6 @@ int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir)
}
filp->f_pos = PID_MAX_LIMIT + TGID_OFFSET;
out:
- put_task_struct(reaper);
-out_no_task:
return 0;
}
diff --git a/fs/proc/root.c b/fs/proc/root.c
index 5da984959edc..13ef6247e7a3 100644
--- a/fs/proc/root.c
+++ b/fs/proc/root.c
@@ -100,7 +100,6 @@ static struct dentry *proc_mount(struct file_system_type *fs_type,
int err;
struct super_block *sb;
struct pid_namespace *ns;
- struct proc_inode *ei;
char *options;
if (flags & MS_KERNMOUNT) {
@@ -130,13 +129,6 @@ static struct dentry *proc_mount(struct file_system_type *fs_type,
sb->s_flags |= MS_ACTIVE;
}
- ei = PROC_I(sb->s_root->d_inode);
- if (!ei->pid) {
- rcu_read_lock();
- ei->pid = get_pid(find_pid_ns(1, ns));
- rcu_read_unlock();
- }
-
return dget(sb->s_root);
}