arch/i386/* fs/* ipc/*: mark variables with uninitialized_var()

Mark variables with uninitialized_var() if such a warning appears,
and analysis proves that the var is initialized properly on all paths
it is used.
Signed-off-by: Jeff Garzik <jeff@garzik.org>

arch/i386/kernel/efi.c

@@ -278,7 +278,7 @@ void efi_memmap_walk(efi_freemem_callback_t callback, void *arg)
 	struct range {
 		unsigned long start;
 		unsigned long end;
-	} prev, curr;
+	} uninitialized_var(prev), curr;
 	efi_memory_desc_t *md;
 	unsigned long start, end;
 	void *p;

fs/ocfs2/file.c

@@ -1867,7 +1867,8 @@ static ssize_t ocfs2_file_buffered_write(struct file *file, loff_t *ppos,
 	loff_t pos;
 	const struct iovec *cur_iov = iov;
 	struct page *user_page, *page;
-	char *buf, *dst;
+	char * uninitialized_var(buf);
+	char *dst;
 	void *fsdata;
 
 	/*

fs/udf/super.c

@@ -1356,7 +1356,7 @@ udf_load_partition(struct super_block *sb, kernel_lb_addr *fileset)
 			case UDF_VIRTUAL_MAP15:
 			case UDF_VIRTUAL_MAP20:
 			{
-				kernel_lb_addr ino;
+				kernel_lb_addr uninitialized_var(ino);
 
 				if (!UDF_SB_LASTBLOCK(sb))
 				{

ipc/msg.c

@@ -385,7 +385,7 @@ copy_msqid_from_user(struct msq_setbuf *out, void __user *buf, int version)
 asmlinkage long sys_msgctl(int msqid, int cmd, struct msqid_ds __user *buf)
 {
 	struct kern_ipc_perm *ipcp;
-	struct msq_setbuf setbuf;
+	struct msq_setbuf uninitialized_var(setbuf);
 	struct msg_queue *msq;
 	int err, version;
 	struct ipc_namespace *ns;
@@ -509,7 +509,7 @@ asmlinkage long sys_msgctl(int msqid, int cmd, struct msqid_ds __user *buf)
 	err = audit_ipc_obj(ipcp);
 	if (err)
 		goto out_unlock_up;
-	if (cmd==IPC_SET) {
+	if (cmd == IPC_SET) {
 		err = audit_ipc_set_perm(setbuf.qbytes, setbuf.uid, setbuf.gid,
 					 setbuf.mode);
 		if (err)

ipc/sem.c

@@ -856,7 +856,7 @@ static int semctl_down(struct ipc_namespace *ns, int semid, int semnum,
 {
 	struct sem_array *sma;
 	int err;
-	struct sem_setbuf setbuf;
+	struct sem_setbuf uninitialized_var(setbuf);
 	struct kern_ipc_perm *ipcp;
 
 	if(cmd == IPC_SET) {