The patch titled
Subject: fs/proc: use __ro_after_init
has been added to the -mm tree. Its filename is
proc-spread-__ro_after_init.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/proc-spread-__ro_after_init.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/proc-spread-__ro_after_init.patch
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------------------------------------------------------
From: Alexey Dobriyan <adobriyan@xxxxxxxxx>
Subject: 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: Alexey Dobriyan <adobriyan@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/proc/base.c | 5 +++--
fs/proc/inode.c | 3 ++-
fs/proc/self.c | 3 ++-
fs/proc/thread_self.c | 3 ++-
4 files changed, 9 insertions(+), 5 deletions(-)
diff -puN fs/proc/base.c~proc-spread-__ro_after_init fs/proc/base.c
--- a/fs/proc/base.c~proc-spread-__ro_after_init
+++ a/fs/proc/base.c
@@ -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;
diff -puN fs/proc/inode.c~proc-spread-__ro_after_init fs/proc/inode.c
--- a/fs/proc/inode.c~proc-spread-__ro_after_init
+++ a/fs/proc/inode.c
@@ -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 inod
}
}
-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)
{
diff -puN fs/proc/self.c~proc-spread-__ro_after_init fs/proc/self.c
--- a/fs/proc/self.c~proc-spread-__ro_after_init
+++ a/fs/proc/self.c
@@ -1,4 +1,5 @@
// 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 pro
.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)
{
diff -puN fs/proc/thread_self.c~proc-spread-__ro_after_init fs/proc/thread_self.c
--- a/fs/proc/thread_self.c~proc-spread-__ro_after_init
+++ a/fs/proc/thread_self.c
@@ -1,4 +1,5 @@
// 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 pro
.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)
{
_
Patches currently in -mm which might be from adobriyan@xxxxxxxxx are
proc-use-%u-for-pid-printing-and-slightly-less-stack.patch
proc-dont-use-read_once-write_once-for-proc-fail-nth.patch
proc-fix-proc-map_files-lookup.patch
proc-simpler-proc-vmcore-cleanup.patch
proc-less-memory-for-proc-map_files-readdir.patch
proc-delete-children_seq_release.patch
proc-rearrange-struct-proc_dir_entry.patch
proc-fixup-comment.patch
proc-spread-__ro_after_init.patch
uuid-cleanup-uapi-linux-uuidh.patch
seq_file-delete-small-value-optimization.patch
cpumask-make-cpumask_size-return-unsigned-int.patch
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