ipc namespace: remove config ipc ns fix

Finish the work : kill all #ifdef CONFIG_IPC_NS.

Thanks Robert !

Signed-off-by: Cedric Le Goater <clg@fr.ibm.com>
Cc: Eric Biederman <ebiederm@xmision.com>
Cc: Robert P. J. Day <rpjday@mindspring.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

ipc/ipc_sysctl.c

@@ -15,17 +15,13 @@
 #include <linux/sysctl.h>
 #include <linux/uaccess.h>
 
-#ifdef CONFIG_IPC_NS
 static void *get_ipc(ctl_table *table)
 {
 	char *which = table->data;
 	struct ipc_namespace *ipc_ns = current->nsproxy->ipc_ns;
 	which = (which - (char *)&init_ipc_ns) + (char *)ipc_ns;
 	return which;
 }
-#else
-#define get_ipc(T) ((T)->data)
-#endif
 
 #ifdef CONFIG_PROC_FS
 static int proc_ipc_dointvec(ctl_table *table, int write, struct file *filp,