The architecture specific information of the running processes could
be useful to the userland. Add support to examine process architecture
specific information externally.
Signed-off-by: Aubrey Li <aubrey...@linux.intel.com>
Cc: Peter Zijlstra <pet...@infradead.org>
Cc: Andi Kleen <a...@linux.intel.com>
Cc: Tim Chen <tim.c.c...@linux.intel.com>
Cc: Dave Hansen <dave.han...@intel.com>
Cc: Arjan van de Ven <ar...@linux.intel.com>
Cc: Linux API <linux-...@vger.kernel.org>
Cc: Alexey Dobriyan <adobri...@gmail.com>
Cc: Andrew Morton <a...@linux-foundation.org>
---
fs/proc/array.c | 5 +++++
include/linux/proc_fs.h | 2 ++
2 files changed, 7 insertions(+)
diff --git a/fs/proc/array.c b/fs/proc/array.c
index 2edbb657f859..331592a61718 100644
--- a/fs/proc/array.c
+++ b/fs/proc/array.c
@@ -401,6 +401,10 @@ static inline void task_thp_status(struct seq_file *m,
struct mm_struct *mm)
seq_printf(m, "THP_enabled:\t%d\n", thp_enabled);
}
+void __weak arch_proc_pid_status(struct seq_file *m, struct task_struct *task)
+{
+}
+
int proc_pid_status(struct seq_file *m, struct pid_namespace *ns,
struct pid *pid, struct task_struct *task)
{
@@ -424,6 +428,7 @@ int proc_pid_status(struct seq_file *m, struct
pid_namespace *ns,
task_cpus_allowed(m, task);
cpuset_task_status_allowed(m, task);
task_context_switch_counts(m, task);
+ arch_proc_pid_status(m, task);
return 0;
}
diff --git a/include/linux/proc_fs.h b/include/linux/proc_fs.h
index 52a283ba0465..bf4328cb58ed 100644
--- a/include/linux/proc_fs.h
+++ b/include/linux/proc_fs.h
@@ -74,6 +74,8 @@ struct proc_dir_entry *proc_create_net_single_write(const
char *name, umode_t mo
proc_write_t write,
void *data);
extern struct pid *tgid_pidfd_to_pid(const struct file *file);
+/* Add support for architecture specific output in /proc/pid/status */
+void arch_proc_pid_status(struct seq_file *m, struct task_struct *task);
#else /* CONFIG_PROC_FS */
--
2.21.0
