proc: convert /proc/$PID/wchan to seq_file interface
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -234,7 +234,8 @@ static int proc_pid_auxv(struct seq_file *m, struct pid_namespace *ns,
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* Provides a wchan file via kallsyms in a proper one-value-per-file format.
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* Returns the resolved symbol. If that fails, simply return the address.
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*/
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static int proc_pid_wchan(struct task_struct *task, char *buffer)
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static int proc_pid_wchan(struct seq_file *m, struct pid_namespace *ns,
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struct pid *pid, struct task_struct *task)
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{
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unsigned long wchan;
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char symname[KSYM_NAME_LEN];
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@ -245,9 +246,9 @@ static int proc_pid_wchan(struct task_struct *task, char *buffer)
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if (!ptrace_may_access(task, PTRACE_MODE_READ))
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return 0;
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else
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return sprintf(buffer, "%lu", wchan);
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return seq_printf(m, "%lu", wchan);
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else
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return sprintf(buffer, "%s", symname);
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return seq_printf(m, "%s", symname);
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}
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#endif /* CONFIG_KALLSYMS */
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@ -2597,7 +2598,7 @@ static const struct pid_entry tgid_base_stuff[] = {
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DIR("attr", S_IRUGO|S_IXUGO, proc_attr_dir_inode_operations, proc_attr_dir_operations),
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#endif
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#ifdef CONFIG_KALLSYMS
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INF("wchan", S_IRUGO, proc_pid_wchan),
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ONE("wchan", S_IRUGO, proc_pid_wchan),
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#endif
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#ifdef CONFIG_STACKTRACE
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ONE("stack", S_IRUSR, proc_pid_stack),
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@ -2935,7 +2936,7 @@ static const struct pid_entry tid_base_stuff[] = {
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DIR("attr", S_IRUGO|S_IXUGO, proc_attr_dir_inode_operations, proc_attr_dir_operations),
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#endif
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#ifdef CONFIG_KALLSYMS
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INF("wchan", S_IRUGO, proc_pid_wchan),
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ONE("wchan", S_IRUGO, proc_pid_wchan),
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#endif
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#ifdef CONFIG_STACKTRACE
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ONE("stack", S_IRUSR, proc_pid_stack),
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