From mboxrd@z Thu Jan 1 00:00:00 1970 From: Aubrey Li Subject: [PATCH v14 1/3] /proc/pid/status: Add support for architecture specific output Date: Wed, 10 Apr 2019 09:53:23 +0800 Message-ID: <20190410015326.24500-1-aubrey.li@linux.intel.com> Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Return-path: Sender: linux-kernel-owner@vger.kernel.org To: tglx@linutronix.de, mingo@redhat.com, peterz@infradead.org, hpa@zytor.com Cc: ak@linux.intel.com, tim.c.chen@linux.intel.com, dave.hansen@intel.com, arjan@linux.intel.com, adobriyan@gmail.com, akpm@linux-foundation.org, aubrey.li@intel.com, linux-api@vger.kernel.org, linux-kernel@vger.kernel.org, Aubrey Li List-Id: linux-api@vger.kernel.org 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 Cc: Peter Zijlstra Cc: Andi Kleen Cc: Tim Chen Cc: Dave Hansen Cc: Arjan van de Ven Cc: Linux API Cc: Alexey Dobriyan Cc: Andrew Morton --- 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