dma_resv: prime lockdep annotations

From d07ea81611ed6e4fb8cc290f42d23dbcca2da2f8 Mon Sep 17 00:00:00 2001
From: Steven Price <[e-mail]>
Date: Mon, 11 Nov 2019 13:07:19 +0000
Subject: [PATCH] dma_resv: Correct return type of dma_resv_lockdep()

subsys_initcall() expects a function which returns 'int'. Fix
dma_resv_lockdep() so it returns an 'int' error code.

Fixes: b2a8116e2592 ("dma_resv: prime lockdep annotations")
Signed-off-by: Steven Price <[e-mail]>
Signed-off-by: Daniel Vetter <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]

drivers/dma-buf/dma-resv.c

···
 }
 
 #if IS_ENABLED(CONFIG_LOCKDEP)
-static void __init dma_resv_lockdep(void)
+static int __init dma_resv_lockdep(void)
 {
 	struct mm_struct *mm = mm_alloc();
 	struct dma_resv obj;
 
 	if (!mm)
-		return;
+		return -ENOMEM;
 
 	dma_resv_init(&obj);
 
···
 	up_read(&mm->mmap_sem);
 	
 	mmput(mm);
+
+	return 0;
 }
 subsys_initcall(dma_resv_lockdep);
 #endif