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Commit efb1a57d authored by Alexey Dobriyan's avatar Alexey Dobriyan Committed by Linus Torvalds
Browse files

fs/proc: use __ro_after_init 

/proc/self inode numbers, value of proc_inode_cache and st_nlink of
/proc/$TGID are fixed constants.

Link: http://lkml.kernel.org/r/20180103184707.GA31849@avx2


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 53f63345

fs/proc/base.c

+3 −2
Original line number Diff line number Diff line
@@ -75,6 +75,7 @@ 
#include <linux/ptrace.h>

#include <linux/tracehook.h>

#include <linux/printk.h>

#include <linux/cache.h>

#include <linux/cgroup.h>

#include <linux/cpuset.h>

#include <linux/audit.h>
@@ -112,8 +113,8 @@ 
 *	in /proc for a task before it execs a suid executable.

 */



static u8 nlink_tid;

static u8 nlink_tgid;

static u8 nlink_tid __ro_after_init;

static u8 nlink_tgid __ro_after_init;



struct pid_entry {

	const char *name;

fs/proc/inode.c

+2 −1
Original line number Diff line number Diff line
@@ -5,6 +5,7 @@ 
 *  Copyright (C) 1991, 1992  Linus Torvalds

 */



#include <linux/cache.h>

#include <linux/time.h>

#include <linux/proc_fs.h>

#include <linux/kernel.h>
@@ -52,7 +53,7 @@ static void proc_evict_inode(struct inode *inode) 
	}

}



static struct kmem_cache * proc_inode_cachep;

static struct kmem_cache *proc_inode_cachep __ro_after_init;



static struct inode *proc_alloc_inode(struct super_block *sb)

{

fs/proc/self.c

+2 −1
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0

#include <linux/cache.h>

#include <linux/sched.h>

#include <linux/slab.h>

#include <linux/pid_namespace.h>
@@ -30,7 +31,7 @@ static const struct inode_operations proc_self_inode_operations = { 
	.get_link	= proc_self_get_link,

};



static unsigned self_inum;

static unsigned self_inum __ro_after_init;



int proc_setup_self(struct super_block *s)

{

fs/proc/thread_self.c

+2 −1
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0

#include <linux/cache.h>

#include <linux/sched.h>

#include <linux/slab.h>

#include <linux/pid_namespace.h>
@@ -30,7 +31,7 @@ static const struct inode_operations proc_thread_self_inode_operations = { 
	.get_link	= proc_thread_self_get_link,

};



static unsigned thread_self_inum;

static unsigned thread_self_inum __ro_after_init;



int proc_setup_thread_self(struct super_block *s)

{