Commit edfcd606 authored by Alexey Dobriyan's avatar Alexey Dobriyan Committed by Linus Torvalds
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proc: convert /proc/$PID/wchan to seq_file interface 



Signed-off-by: default avatarAlexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 2ca66ff7

fs/proc/base.c

+6 −5
Original line number Diff line number Diff line
@@ -234,7 +234,8 @@ static int proc_pid_auxv(struct seq_file *m, struct pid_namespace *ns, 
 * Provides a wchan file via kallsyms in a proper one-value-per-file format.

 * Returns the resolved symbol.  If that fails, simply return the address.

 */

static int proc_pid_wchan(struct task_struct *task, char *buffer)

static int proc_pid_wchan(struct seq_file *m, struct pid_namespace *ns,

			  struct pid *pid, struct task_struct *task)

{

	unsigned long wchan;

	char symname[KSYM_NAME_LEN];
@@ -245,9 +246,9 @@ static int proc_pid_wchan(struct task_struct *task, char *buffer) 
		if (!ptrace_may_access(task, PTRACE_MODE_READ))

			return 0;

		else

			return sprintf(buffer, "%lu", wchan);

			return seq_printf(m, "%lu", wchan);

	else

		return sprintf(buffer, "%s", symname);

		return seq_printf(m, "%s", symname);

}

#endif /* CONFIG_KALLSYMS */
@@ -2597,7 +2598,7 @@ static const struct pid_entry tgid_base_stuff[] = { 
	DIR("attr",       S_IRUGO|S_IXUGO, proc_attr_dir_inode_operations, proc_attr_dir_operations),

#endif

#ifdef CONFIG_KALLSYMS

	INF("wchan",      S_IRUGO, proc_pid_wchan),

	ONE("wchan",      S_IRUGO, proc_pid_wchan),

#endif

#ifdef CONFIG_STACKTRACE

	ONE("stack",      S_IRUSR, proc_pid_stack),
@@ -2935,7 +2936,7 @@ static const struct pid_entry tid_base_stuff[] = { 
	DIR("attr",      S_IRUGO|S_IXUGO, proc_attr_dir_inode_operations, proc_attr_dir_operations),

#endif

#ifdef CONFIG_KALLSYMS

	INF("wchan",     S_IRUGO, proc_pid_wchan),

	ONE("wchan",     S_IRUGO, proc_pid_wchan),

#endif

#ifdef CONFIG_STACKTRACE

	ONE("stack",      S_IRUSR, proc_pid_stack),