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sysctl: Remove the now unused ctl_table parent field. 

While useful at one time for selinux and the sysctl sanity
checks those users no longer use the parent field and we can
safely remove it.

Inspired-by: Lucian Adrian Grijincu <lucian.grijincu@gmil.com>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
This commit is contained in:
Eric W. Biederman 2012-01-06 11:55:30 -08:00
parent 7c60c48f58
commit 8d6ecfcc01
2 changed files with 1 additions and 12 deletions
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12
fs/proc/proc_sysctl.c
View File

@ -218,16 +218,6 @@ static int sysctl_perm(struct ctl_table_root *root, struct ctl_table *table, int
return test_perm(mode, op);
}
static void sysctl_set_parent(struct ctl_table *parent, struct ctl_table *table)
{
for (; table->procname; table++) {
table->parent = parent;
if (table->child)
sysctl_set_parent(table, table->child);
}
}
static struct inode *proc_sys_make_inode(struct super_block *sb,
struct ctl_table_header *head, struct ctl_table *table)
{
@ -947,10 +937,10 @@ struct ctl_table_header *__register_sysctl_table(
header->used = 0;
header->unregistering = NULL;
header->root = root;
sysctl_set_parent(NULL, header->ctl_table);
header->count = 1;
if (sysctl_check_table(path, table))
goto fail;
spin_lock(&sysctl_lock);
header->set = lookup_header_set(root, namespaces);
header->attached_by = header->ctl_table;

1
include/linux/sysctl.h
View File

@ -1016,7 +1016,6 @@ struct ctl_table
int maxlen;
umode_t mode;
struct ctl_table *child; /* Deprecated */
struct ctl_table *parent; /* Automatically set */
proc_handler *proc_handler; /* Callback for text formatting */
struct ctl_table_poll *poll;
void *extra1;