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Commit 1a384eaa authored by Al Viro's avatar Al Viro
Browse files

teach proc_self_get_link()/proc_thread_self_get_link() to work in RCU mode 



Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent 6a6c9904

fs/proc/self.c

+3 −5
Original line number Diff line number Diff line
@@ -25,14 +25,12 @@ static const char *proc_self_get_link(struct dentry *dentry, 
	pid_t tgid = task_tgid_nr_ns(current, ns);

	char *name;



	if (!dentry)

		return ERR_PTR(-ECHILD);

	if (!tgid)

		return ERR_PTR(-ENOENT);

	/* 11 for max length of signed int in decimal + NULL term */

	name = kmalloc(12, GFP_KERNEL);

	if (!name)

		return ERR_PTR(-ENOMEM);

	name = kmalloc(12, dentry ? GFP_KERNEL : GFP_ATOMIC);

	if (unlikely(!name))

		return dentry ? ERR_PTR(-ENOMEM) : ERR_PTR(-ECHILD);

	sprintf(name, "%d", tgid);

	return *cookie = name;

}

fs/proc/thread_self.c

+4 −5
Original line number Diff line number Diff line
@@ -27,13 +27,12 @@ static const char *proc_thread_self_get_link(struct dentry *dentry, 
	pid_t pid = task_pid_nr_ns(current, ns);

	char *name;



	if (!dentry)

		return ERR_PTR(-ECHILD);

	if (!pid)

		return ERR_PTR(-ENOENT);

	name = kmalloc(PROC_NUMBUF + 6 + PROC_NUMBUF, GFP_KERNEL);

	if (!name)

		return ERR_PTR(-ENOMEM);

	name = kmalloc(PROC_NUMBUF + 6 + PROC_NUMBUF,

				dentry ? GFP_KERNEL : GFP_ATOMIC);

	if (unlikely(!name))

		return dentry ? ERR_PTR(-ENOMEM) : ERR_PTR(-ECHILD);

	sprintf(name, "%d/task/%d", tgid, pid);

	return *cookie = name;

}