ramoops: move spin_lock_init after kmalloc error checking

If cxt->pstore.buf allocated failed, no need to initialize
cxt->pstore.buf_lock. So this patch moves spin_lock_init() after the
error checking.
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Kees Cook <keescook@chromium.org>

fs/pstore/ram.c

@@ -635,12 +635,12 @@ static int ramoops_probe(struct platform_device *pdev)
 		cxt->pstore.bufsize = 1024; /* LOG_LINE_MAX */
 	cxt->pstore.bufsize = max(cxt->record_size, cxt->pstore.bufsize);
 	cxt->pstore.buf = kmalloc(cxt->pstore.bufsize, GFP_KERNEL);
-	spin_lock_init(&cxt->pstore.buf_lock);
 	if (!cxt->pstore.buf) {
 		pr_err("cannot allocate pstore buffer\n");
 		err = -ENOMEM;
 		goto fail_clear;
 	}
+	spin_lock_init(&cxt->pstore.buf_lock);
 
 	cxt->pstore.flags = PSTORE_FLAGS_DMESG;
 	if (cxt->console_size)