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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>
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@ -218,16 +218,6 @@ static int sysctl_perm(struct ctl_table_root *root, struct ctl_table *table, int
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return test_perm(mode, op);
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}
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static void sysctl_set_parent(struct ctl_table *parent, struct ctl_table *table)
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{
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for (; table->procname; table++) {
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table->parent = parent;
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if (table->child)
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sysctl_set_parent(table, table->child);
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}
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}
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static struct inode *proc_sys_make_inode(struct super_block *sb,
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struct ctl_table_header *head, struct ctl_table *table)
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{
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@ -947,10 +937,10 @@ struct ctl_table_header *__register_sysctl_table(
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header->used = 0;
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header->unregistering = NULL;
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header->root = root;
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sysctl_set_parent(NULL, header->ctl_table);
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header->count = 1;
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if (sysctl_check_table(path, table))
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goto fail;
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spin_lock(&sysctl_lock);
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header->set = lookup_header_set(root, namespaces);
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header->attached_by = header->ctl_table;
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@ -1016,7 +1016,6 @@ struct ctl_table
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int maxlen;
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umode_t mode;
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struct ctl_table *child; /* Deprecated */
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struct ctl_table *parent; /* Automatically set */
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proc_handler *proc_handler; /* Callback for text formatting */
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struct ctl_table_poll *poll;
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void *extra1;
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