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proc: constify seq_operations 

proc_uid_seq_operations, proc_gid_seq_operations and
proc_projid_seq_operations are only called in proc_id_map_open with
seq_open as const struct seq_operations so we can constify the 3
structures and update proc_id_map_open prototype.

   text    data     bss     dec     hex filename
   6817     404    1984    9205    23f5 kernel/user_namespace.o-before
   6913     308    1984    9205    23f5 kernel/user_namespace.o-after

Signed-off-by: Fabian Frederick <fabf@skynet.be>
Cc: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Fabian Frederick 2014-08-08 14:21:22 -07:00 committed by Linus Torvalds
parent 108a8a11cb
commit ccf94f1b4a
3 changed files with 7 additions and 7 deletions
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2
fs/proc/base.c
View File

@ -2449,7 +2449,7 @@ static int proc_tgid_io_accounting(struct task_struct *task, char *buffer)
#ifdef CONFIG_USER_NS
static int proc_id_map_open(struct inode *inode, struct file *file,
struct seq_operations *seq_ops)
const struct seq_operations *seq_ops)
{
struct user_namespace *ns = NULL;
struct task_struct *task;

6
include/linux/user_namespace.h
View File

@ -57,9 +57,9 @@ static inline void put_user_ns(struct user_namespace *ns)
}
struct seq_operations;
extern struct seq_operations proc_uid_seq_operations;
extern struct seq_operations proc_gid_seq_operations;
extern struct seq_operations proc_projid_seq_operations;
extern const struct seq_operations proc_uid_seq_operations;
extern const struct seq_operations proc_gid_seq_operations;
extern const struct seq_operations proc_projid_seq_operations;
extern ssize_t proc_uid_map_write(struct file *, const char __user *, size_t, loff_t *);
extern ssize_t proc_gid_map_write(struct file *, const char __user *, size_t, loff_t *);
extern ssize_t proc_projid_map_write(struct file *, const char __user *, size_t, loff_t *);

6
kernel/user_namespace.c
View File

@ -526,21 +526,21 @@ static void m_stop(struct seq_file *seq, void *v)
return;
}
struct seq_operations proc_uid_seq_operations = {
const struct seq_operations proc_uid_seq_operations = {
.start = uid_m_start,
.stop = m_stop,
.next = m_next,
.show = uid_m_show,
};
struct seq_operations proc_gid_seq_operations = {
const struct seq_operations proc_gid_seq_operations = {
.start = gid_m_start,
.stop = m_stop,
.next = m_next,
.show = gid_m_show,
};
struct seq_operations proc_projid_seq_operations = {
const struct seq_operations proc_projid_seq_operations = {
.start = projid_m_start,
.stop = m_stop,
.next = m_next,