openwrt/target/linux/generic/hack-4.19/904-debloat_dma_buf.patch

From e3692cb2fcd5ba1244512a0f43b8118f65f1c375 Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@nbd.name>
Date: Sat, 8 Jul 2017 08:20:43 +0200
Subject: debloat: dmabuf

Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
 drivers/base/Kconfig      |  2 +-
 drivers/dma-buf/Makefile  | 10 +++++++---
 drivers/dma-buf/dma-buf.c |  4 +++-
 kernel/sched/core.c       |  1 +
 4 files changed, 12 insertions(+), 5 deletions(-)

--- a/drivers/base/Kconfig
+++ b/drivers/base/Kconfig
@@ -172,7 +172,7 @@ config SOC_BUS
 source "drivers/base/regmap/Kconfig"
 
 config DMA_SHARED_BUFFER
-	bool
+	tristate
 	default n
 	select ANON_INODES
 	select IRQ_WORK
--- a/drivers/dma-buf/Makefile
+++ b/drivers/dma-buf/Makefile
@@ -1,3 +1,7 @@
-obj-y := dma-buf.o dma-fence.o dma-fence-array.o reservation.o seqno-fence.o
-obj-$(CONFIG_SYNC_FILE)		+= sync_file.o
-obj-$(CONFIG_SW_SYNC)		+= sw_sync.o sync_debug.o
+obj-$(CONFIG_DMA_SHARED_BUFFER) := dma-shared-buffer.o
+
+dma-buf-objs-y := dma-buf.o dma-fence.o dma-fence-array.o reservation.o seqno-fence.o
+dma-buf-objs-$(CONFIG_SYNC_FILE)		+= sync_file.o
+dma-buf-objs-$(CONFIG_SW_SYNC)		+= sw_sync.o sync_debug.o
+
+dma-shared-buffer-objs :=  $(dma-buf-objs-y)
--- a/drivers/dma-buf/dma-buf.c
+++ b/drivers/dma-buf/dma-buf.c
@@ -34,6 +34,7 @@
 #include <linux/poll.h>
 #include <linux/reservation.h>
 #include <linux/mm.h>
+#include <linux/module.h>
 
 #include <uapi/linux/dma-buf.h>
 
@@ -1158,4 +1159,5 @@ static void __exit dma_buf_deinit(void)
 {
 	dma_buf_uninit_debugfs();
 }
-__exitcall(dma_buf_deinit);
+module_exit(dma_buf_deinit);
+MODULE_LICENSE("GPL");
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -2129,6 +2129,7 @@ int wake_up_state(struct task_struct *p,
 {
 	return try_to_wake_up(p, state, 0);
 }
+EXPORT_SYMBOL_GPL(wake_up_state);
 
 /*
  * Perform scheduler related setup for a newly forked process p.