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Commit d4cab38e authored by Gustavo Padovan's avatar Gustavo Padovan Committed by Greg Kroah-Hartman
Browse files

staging/android: prepare sync_file for de-staging 



Move its functions and structs to their own file. Also moves function's
docs to the .c file.

Signed-off-by: default avatarGustavo Padovan <gustavo.padovan@collabora.co.uk>
Reviewed-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent d7c3110c

drivers/staging/android/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -4,5 +4,5 @@ obj-y += ion/ 


obj-$(CONFIG_ASHMEM)			+= ashmem.o

obj-$(CONFIG_ANDROID_LOW_MEMORY_KILLER)	+= lowmemorykiller.o

obj-$(CONFIG_SYNC)			+= sync.o sync_debug.o

obj-$(CONFIG_SYNC)			+= sync_file.o sync.o sync_debug.o

obj-$(CONFIG_SW_SYNC)			+= sw_sync.o

drivers/staging/android/sync.c

+0 −374
Original line number Diff line number Diff line
@@ -16,10 +16,7 @@ 


#include <linux/debugfs.h>

#include <linux/export.h>

#include <linux/file.h>

#include <linux/fs.h>

#include <linux/kernel.h>

#include <linux/poll.h>

#include <linux/sched.h>

#include <linux/seq_file.h>

#include <linux/slab.h>
@@ -32,7 +29,6 @@ 
#include "trace/sync.h"



static const struct fence_ops android_fence_ops;

static const struct file_operations sync_file_fops;



struct sync_timeline *sync_timeline_create(const struct sync_timeline_ops *ops,

					   int size, const char *name)
@@ -136,182 +132,6 @@ struct fence *sync_pt_create(struct sync_timeline *obj, int size) 
}

EXPORT_SYMBOL(sync_pt_create);



static struct sync_file *sync_file_alloc(int size)

{

	struct sync_file *sync_file;



	sync_file = kzalloc(size, GFP_KERNEL);

	if (!sync_file)

		return NULL;



	sync_file->file = anon_inode_getfile("sync_file", &sync_file_fops,

					     sync_file, 0);

	if (IS_ERR(sync_file->file))

		goto err;



	kref_init(&sync_file->kref);



	init_waitqueue_head(&sync_file->wq);



	return sync_file;



err:

	kfree(sync_file);

	return NULL;

}



static void fence_check_cb_func(struct fence *f, struct fence_cb *cb)

{

	struct sync_file_cb *check;

	struct sync_file *sync_file;



	check = container_of(cb, struct sync_file_cb, cb);

	sync_file = check->sync_file;



	if (atomic_dec_and_test(&sync_file->status))

		wake_up_all(&sync_file->wq);

}



/**

 * sync_fence_create() - creates a sync fence

 * @fence:	fence to add to the sync_fence

 *

 * Creates a sync_file containg @fence. Once this is called, the sync_file

 * takes ownership of @fence.

 */

struct sync_file *sync_file_create(struct fence *fence)

{

	struct sync_file *sync_file;



	sync_file = sync_file_alloc(offsetof(struct sync_file, cbs[1]));

	if (!sync_file)

		return NULL;



	sync_file->num_fences = 1;

	atomic_set(&sync_file->status, 1);

	snprintf(sync_file->name, sizeof(sync_file->name), "%s-%s%d-%d",

		 fence->ops->get_driver_name(fence),

		 fence->ops->get_timeline_name(fence), fence->context,

		 fence->seqno);



	sync_file->cbs[0].fence = fence;

	sync_file->cbs[0].sync_file = sync_file;

	if (fence_add_callback(fence, &sync_file->cbs[0].cb,

			       fence_check_cb_func))

		atomic_dec(&sync_file->status);



	sync_file_debug_add(sync_file);



	return sync_file;

}

EXPORT_SYMBOL(sync_file_create);



/**

 * sync_file_fdget() - get a sync_file from an fd

 * @fd:		fd referencing a fence

 *

 * Ensures @fd references a valid sync_file, increments the refcount of the

 * backing file. Returns the sync_file or NULL in case of error.

 */

static struct sync_file *sync_file_fdget(int fd)

{

	struct file *file = fget(fd);



	if (!file)

		return NULL;



	if (file->f_op != &sync_file_fops)

		goto err;



	return file->private_data;



err:

	fput(file);

	return NULL;

}



static void sync_file_add_pt(struct sync_file *sync_file, int *i,

			     struct fence *fence)

{

	sync_file->cbs[*i].fence = fence;

	sync_file->cbs[*i].sync_file = sync_file;



	if (!fence_add_callback(fence, &sync_file->cbs[*i].cb,

				fence_check_cb_func)) {

		fence_get(fence);

		(*i)++;

	}

}



/**

 * sync_file_merge() - merge two sync_files

 * @name:	name of new fence

 * @a:		sync_file a

 * @b:		sync_file b

 *

 * Creates a new sync_file which contains copies of all the fences in both

 * @a and @b.  @a and @b remain valid, independent sync_file. Returns the

 * new merged sync_file or NULL in case of error.

 */

static struct sync_file *sync_file_merge(const char *name, struct sync_file *a,

					 struct sync_file *b)

{

	int num_fences = a->num_fences + b->num_fences;

	struct sync_file *sync_file;

	int i, i_a, i_b;

	unsigned long size = offsetof(struct sync_file, cbs[num_fences]);



	sync_file = sync_file_alloc(size);

	if (!sync_file)

		return NULL;



	atomic_set(&sync_file->status, num_fences);



	/*

	 * Assume sync_file a and b are both ordered and have no

	 * duplicates with the same context.

	 *

	 * If a sync_file can only be created with sync_file_merge

	 * and sync_file_create, this is a reasonable assumption.

	 */

	for (i = i_a = i_b = 0; i_a < a->num_fences && i_b < b->num_fences; ) {

		struct fence *pt_a = a->cbs[i_a].fence;

		struct fence *pt_b = b->cbs[i_b].fence;



		if (pt_a->context < pt_b->context) {

			sync_file_add_pt(sync_file, &i, pt_a);



			i_a++;

		} else if (pt_a->context > pt_b->context) {

			sync_file_add_pt(sync_file, &i, pt_b);



			i_b++;

		} else {

			if (pt_a->seqno - pt_b->seqno <= INT_MAX)

				sync_file_add_pt(sync_file, &i, pt_a);

			else

				sync_file_add_pt(sync_file, &i, pt_b);



			i_a++;

			i_b++;

		}

	}



	for (; i_a < a->num_fences; i_a++)

		sync_file_add_pt(sync_file, &i, a->cbs[i_a].fence);



	for (; i_b < b->num_fences; i_b++)

		sync_file_add_pt(sync_file, &i, b->cbs[i_b].fence);



	if (num_fences > i)

		atomic_sub(num_fences - i, &sync_file->status);

	sync_file->num_fences = i;



	strlcpy(sync_file->name, name, sizeof(sync_file->name));

	sync_file_debug_add(sync_file);

	return sync_file;

}



static const char *android_fence_get_driver_name(struct fence *fence)

{

	struct sync_timeline *parent = fence_parent(fence);
@@ -399,197 +219,3 @@ static const struct fence_ops android_fence_ops = { 
	.fence_value_str = android_fence_value_str,

	.timeline_value_str = android_fence_timeline_value_str,

};
 


static void sync_file_free(struct kref *kref)

{

	struct sync_file *sync_file = container_of(kref, struct sync_file,

						     kref);

	int i;



	for (i = 0; i < sync_file->num_fences; ++i) {

		fence_remove_callback(sync_file->cbs[i].fence,

				      &sync_file->cbs[i].cb);

		fence_put(sync_file->cbs[i].fence);

	}



	kfree(sync_file);

}



static int sync_file_release(struct inode *inode, struct file *file)

{

	struct sync_file *sync_file = file->private_data;



	sync_file_debug_remove(sync_file);



	kref_put(&sync_file->kref, sync_file_free);

	return 0;

}



static unsigned int sync_file_poll(struct file *file, poll_table *wait)

{

	struct sync_file *sync_file = file->private_data;

	int status;



	poll_wait(file, &sync_file->wq, wait);



	status = atomic_read(&sync_file->status);



	if (!status)

		return POLLIN;

	if (status < 0)

		return POLLERR;

	return 0;

}



static long sync_file_ioctl_merge(struct sync_file *sync_file,

				   unsigned long arg)

{

	int fd = get_unused_fd_flags(O_CLOEXEC);

	int err;

	struct sync_file *fence2, *fence3;

	struct sync_merge_data data;



	if (fd < 0)

		return fd;



	if (copy_from_user(&data, (void __user *)arg, sizeof(data))) {

		err = -EFAULT;

		goto err_put_fd;

	}



	if (data.flags || data.pad) {

		err = -EINVAL;

		goto err_put_fd;

	}



	fence2 = sync_file_fdget(data.fd2);

	if (!fence2) {

		err = -ENOENT;

		goto err_put_fd;

	}



	data.name[sizeof(data.name) - 1] = '\0';

	fence3 = sync_file_merge(data.name, sync_file, fence2);

	if (!fence3) {

		err = -ENOMEM;

		goto err_put_fence2;

	}



	data.fence = fd;

	if (copy_to_user((void __user *)arg, &data, sizeof(data))) {

		err = -EFAULT;

		goto err_put_fence3;

	}



	fd_install(fd, fence3->file);

	fput(fence2->file);

	return 0;



err_put_fence3:

	fput(fence3->file);



err_put_fence2:

	fput(fence2->file);



err_put_fd:

	put_unused_fd(fd);

	return err;

}



static void sync_fill_fence_info(struct fence *fence,

				struct sync_fence_info *info)

{

	strlcpy(info->obj_name, fence->ops->get_timeline_name(fence),

		sizeof(info->obj_name));

	strlcpy(info->driver_name, fence->ops->get_driver_name(fence),

		sizeof(info->driver_name));

	if (fence_is_signaled(fence))

		info->status = fence->status >= 0 ? 1 : fence->status;

	else

		info->status = 0;

	info->timestamp_ns = ktime_to_ns(fence->timestamp);

}



static long sync_file_ioctl_fence_info(struct sync_file *sync_file,

					unsigned long arg)

{

	struct sync_file_info info;

	struct sync_fence_info *fence_info = NULL;

	__u32 size;

	int ret, i;



	if (copy_from_user(&info, (void __user *)arg, sizeof(info)))

		return -EFAULT;



	if (info.flags || info.pad)

		return -EINVAL;



	/*

	 * Passing num_fences = 0 means that userspace doesn't want to

	 * retrieve any sync_fence_info. If num_fences = 0 we skip filling

	 * sync_fence_info and return the actual number of fences on

	 * info->num_fences.

	 */

	if (!info.num_fences)

		goto no_fences;



	if (info.num_fences < sync_file->num_fences)

		return -EINVAL;



	size = sync_file->num_fences * sizeof(*fence_info);

	fence_info = kzalloc(size, GFP_KERNEL);

	if (!fence_info)

		return -ENOMEM;



	for (i = 0; i < sync_file->num_fences; ++i)

		sync_fill_fence_info(sync_file->cbs[i].fence, &fence_info[i]);



	if (copy_to_user(u64_to_user_ptr(info.sync_fence_info), fence_info,

			 size)) {

		ret = -EFAULT;

		goto out;

	}



no_fences:

	strlcpy(info.name, sync_file->name, sizeof(info.name));

	info.status = atomic_read(&sync_file->status);

	if (info.status >= 0)

		info.status = !info.status;



	info.num_fences = sync_file->num_fences;



	if (copy_to_user((void __user *)arg, &info, sizeof(info)))

		ret = -EFAULT;

	else

		ret = 0;



out:

	kfree(fence_info);



	return ret;

}



static long sync_file_ioctl(struct file *file, unsigned int cmd,

			     unsigned long arg)

{

	struct sync_file *sync_file = file->private_data;



	switch (cmd) {

	case SYNC_IOC_MERGE:

		return sync_file_ioctl_merge(sync_file, arg);



	case SYNC_IOC_FILE_INFO:

		return sync_file_ioctl_fence_info(sync_file, arg);



	default:

		return -ENOTTY;

	}

}



static const struct file_operations sync_file_fops = {

	.release = sync_file_release,

	.poll = sync_file_poll,

	.unlocked_ioctl = sync_file_ioctl,

	.compat_ioctl = sync_file_ioctl,

};

drivers/staging/android/sync.h

+2 −36
Original line number Diff line number Diff line
@@ -20,10 +20,10 @@ 
#include <linux/spinlock.h>

#include <linux/fence.h>



#include "uapi/sync.h"

#include "sync_file.h"

#include "uapi/sync_file.h"



struct sync_timeline;

struct sync_file;



/**

 * struct sync_timeline_ops - sync object implementation ops
@@ -86,38 +86,6 @@ static inline struct sync_timeline *fence_parent(struct fence *fence) 
			    child_list_lock);

}



struct sync_file_cb {

	struct fence_cb cb;

	struct fence *fence;

	struct sync_file *sync_file;

};



/**

 * struct sync_file - sync file to export to the userspace

 * @file:		file representing this fence

 * @kref:		reference count on fence.

 * @name:		name of sync_file.  Useful for debugging

 * @sync_file_list:	membership in global file list

 * @num_fences		number of sync_pts in the fence

 * @wq:			wait queue for fence signaling

 * @status:		0: signaled, >0:active, <0: error

 * @cbs:		sync_pts callback information

 */

struct sync_file {

	struct file		*file;

	struct kref		kref;

	char			name[32];

#ifdef CONFIG_DEBUG_FS

	struct list_head	sync_file_list;

#endif

	int num_fences;



	wait_queue_head_t	wq;

	atomic_t		status;



	struct sync_file_cb	cbs[];

};



/*

 * API for sync_timeline implementers

 */
@@ -167,8 +135,6 @@ void sync_timeline_signal(struct sync_timeline *obj); 
 */

struct fence *sync_pt_create(struct sync_timeline *parent, int size);



struct sync_file *sync_file_create(struct fence *fence);



#ifdef CONFIG_DEBUG_FS



void sync_timeline_debug_add(struct sync_timeline *obj);

drivers/staging/android/sync_debug.c

+1 −0
Original line number Diff line number Diff line
@@ -26,6 +26,7 @@ 
#include <linux/uaccess.h>

#include <linux/anon_inodes.h>

#include <linux/time64.h>

#include "sync_file.h"

#include "sw_sync.h"



#ifdef CONFIG_DEBUG_FS

drivers/staging/android/sync_file.c

0 → 100644
+394 −0
Original line number Diff line number Diff line 
/*

 * drivers/dma-buf/sync_file.c

 *

 * Copyright (C) 2012 Google, Inc.

 *

 * This software is licensed under the terms of the GNU General Public

 * License version 2, as published by the Free Software Foundation, and

 * may be copied, distributed, and modified under those terms.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 */



#include <linux/export.h>

#include <linux/file.h>

#include <linux/fs.h>

#include <linux/kernel.h>

#include <linux/poll.h>

#include <linux/sched.h>

#include <linux/slab.h>

#include <linux/uaccess.h>

#include <linux/anon_inodes.h>

#include "sync_file.h"

#include "uapi/sync_file.h"



static const struct file_operations sync_file_fops;



static struct sync_file *sync_file_alloc(int size)

{

	struct sync_file *sync_file;



	sync_file = kzalloc(size, GFP_KERNEL);

	if (!sync_file)

		return NULL;



	sync_file->file = anon_inode_getfile("sync_file", &sync_file_fops,

					     sync_file, 0);

	if (IS_ERR(sync_file->file))

		goto err;



	kref_init(&sync_file->kref);



	init_waitqueue_head(&sync_file->wq);



	return sync_file;



err:

	kfree(sync_file);

	return NULL;

}



static void fence_check_cb_func(struct fence *f, struct fence_cb *cb)

{

	struct sync_file_cb *check;

	struct sync_file *sync_file;



	check = container_of(cb, struct sync_file_cb, cb);

	sync_file = check->sync_file;



	if (atomic_dec_and_test(&sync_file->status))

		wake_up_all(&sync_file->wq);

}



/**

 * sync_fence_create() - creates a sync fence

 * @fence:	fence to add to the sync_fence

 *

 * Creates a sync_file containg @fence. Once this is called, the sync_file

 * takes ownership of @fence.

 */

struct sync_file *sync_file_create(struct fence *fence)

{

	struct sync_file *sync_file;



	sync_file = sync_file_alloc(offsetof(struct sync_file, cbs[1]));

	if (!sync_file)

		return NULL;



	sync_file->num_fences = 1;

	atomic_set(&sync_file->status, 1);

	snprintf(sync_file->name, sizeof(sync_file->name), "%s-%s%d-%d",

		 fence->ops->get_driver_name(fence),

		 fence->ops->get_timeline_name(fence), fence->context,

		 fence->seqno);



	sync_file->cbs[0].fence = fence;

	sync_file->cbs[0].sync_file = sync_file;

	if (fence_add_callback(fence, &sync_file->cbs[0].cb,

			       fence_check_cb_func))

		atomic_dec(&sync_file->status);



	return sync_file;

}

EXPORT_SYMBOL(sync_file_create);



/**

 * sync_file_fdget() - get a sync_file from an fd

 * @fd:		fd referencing a fence

 *

 * Ensures @fd references a valid sync_file, increments the refcount of the

 * backing file. Returns the sync_file or NULL in case of error.

 */

static struct sync_file *sync_file_fdget(int fd)

{

	struct file *file = fget(fd);



	if (!file)

		return NULL;



	if (file->f_op != &sync_file_fops)

		goto err;



	return file->private_data;



err:

	fput(file);

	return NULL;

}



static void sync_file_add_pt(struct sync_file *sync_file, int *i,

			     struct fence *fence)

{

	sync_file->cbs[*i].fence = fence;

	sync_file->cbs[*i].sync_file = sync_file;



	if (!fence_add_callback(fence, &sync_file->cbs[*i].cb,

				fence_check_cb_func)) {

		fence_get(fence);

		(*i)++;

	}

}



/**

 * sync_file_merge() - merge two sync_files

 * @name:	name of new fence

 * @a:		sync_file a

 * @b:		sync_file b

 *

 * Creates a new sync_file which contains copies of all the fences in both

 * @a and @b.  @a and @b remain valid, independent sync_file. Returns the

 * new merged sync_file or NULL in case of error.

 */

static struct sync_file *sync_file_merge(const char *name, struct sync_file *a,

					 struct sync_file *b)

{

	int num_fences = a->num_fences + b->num_fences;

	struct sync_file *sync_file;

	int i, i_a, i_b;

	unsigned long size = offsetof(struct sync_file, cbs[num_fences]);



	sync_file = sync_file_alloc(size);

	if (!sync_file)

		return NULL;



	atomic_set(&sync_file->status, num_fences);



	/*

	 * Assume sync_file a and b are both ordered and have no

	 * duplicates with the same context.

	 *

	 * If a sync_file can only be created with sync_file_merge

	 * and sync_file_create, this is a reasonable assumption.

	 */

	for (i = i_a = i_b = 0; i_a < a->num_fences && i_b < b->num_fences; ) {

		struct fence *pt_a = a->cbs[i_a].fence;

		struct fence *pt_b = b->cbs[i_b].fence;



		if (pt_a->context < pt_b->context) {

			sync_file_add_pt(sync_file, &i, pt_a);



			i_a++;

		} else if (pt_a->context > pt_b->context) {

			sync_file_add_pt(sync_file, &i, pt_b);



			i_b++;

		} else {

			if (pt_a->seqno - pt_b->seqno <= INT_MAX)

				sync_file_add_pt(sync_file, &i, pt_a);

			else

				sync_file_add_pt(sync_file, &i, pt_b);



			i_a++;

			i_b++;

		}

	}



	for (; i_a < a->num_fences; i_a++)

		sync_file_add_pt(sync_file, &i, a->cbs[i_a].fence);



	for (; i_b < b->num_fences; i_b++)

		sync_file_add_pt(sync_file, &i, b->cbs[i_b].fence);



	if (num_fences > i)

		atomic_sub(num_fences - i, &sync_file->status);

	sync_file->num_fences = i;



	strlcpy(sync_file->name, name, sizeof(sync_file->name));

	return sync_file;

}



static void sync_file_free(struct kref *kref)

{

	struct sync_file *sync_file = container_of(kref, struct sync_file,

						     kref);

	int i;



	for (i = 0; i < sync_file->num_fences; ++i) {

		fence_remove_callback(sync_file->cbs[i].fence,

				      &sync_file->cbs[i].cb);

		fence_put(sync_file->cbs[i].fence);

	}



	kfree(sync_file);

}



static int sync_file_release(struct inode *inode, struct file *file)

{

	struct sync_file *sync_file = file->private_data;



	kref_put(&sync_file->kref, sync_file_free);

	return 0;

}



static unsigned int sync_file_poll(struct file *file, poll_table *wait)

{

	struct sync_file *sync_file = file->private_data;

	int status;



	poll_wait(file, &sync_file->wq, wait);



	status = atomic_read(&sync_file->status);



	if (!status)

		return POLLIN;

	if (status < 0)

		return POLLERR;

	return 0;

}



static long sync_file_ioctl_merge(struct sync_file *sync_file,

				   unsigned long arg)

{

	int fd = get_unused_fd_flags(O_CLOEXEC);

	int err;

	struct sync_file *fence2, *fence3;

	struct sync_merge_data data;



	if (fd < 0)

		return fd;



	if (copy_from_user(&data, (void __user *)arg, sizeof(data))) {

		err = -EFAULT;

		goto err_put_fd;

	}



	if (data.flags || data.pad) {

		err = -EINVAL;

		goto err_put_fd;

	}



	fence2 = sync_file_fdget(data.fd2);

	if (!fence2) {

		err = -ENOENT;

		goto err_put_fd;

	}



	data.name[sizeof(data.name) - 1] = '\0';

	fence3 = sync_file_merge(data.name, sync_file, fence2);

	if (!fence3) {

		err = -ENOMEM;

		goto err_put_fence2;

	}



	data.fence = fd;

	if (copy_to_user((void __user *)arg, &data, sizeof(data))) {

		err = -EFAULT;

		goto err_put_fence3;

	}



	fd_install(fd, fence3->file);

	fput(fence2->file);

	return 0;



err_put_fence3:

	fput(fence3->file);



err_put_fence2:

	fput(fence2->file);



err_put_fd:

	put_unused_fd(fd);

	return err;

}



static void sync_fill_fence_info(struct fence *fence,

				struct sync_fence_info *info)

{

	strlcpy(info->obj_name, fence->ops->get_timeline_name(fence),

		sizeof(info->obj_name));

	strlcpy(info->driver_name, fence->ops->get_driver_name(fence),

		sizeof(info->driver_name));

	if (fence_is_signaled(fence))

		info->status = fence->status >= 0 ? 1 : fence->status;

	else

		info->status = 0;

	info->timestamp_ns = ktime_to_ns(fence->timestamp);

}



static long sync_file_ioctl_fence_info(struct sync_file *sync_file,

					unsigned long arg)

{

	struct sync_file_info info;

	struct sync_fence_info *fence_info = NULL;

	__u32 size;

	int ret, i;



	if (copy_from_user(&info, (void __user *)arg, sizeof(info)))

		return -EFAULT;



	if (info.flags || info.pad)

		return -EINVAL;



	/*

	 * Passing num_fences = 0 means that userspace doesn't want to

	 * retrieve any sync_fence_info. If num_fences = 0 we skip filling

	 * sync_fence_info and return the actual number of fences on

	 * info->num_fences.

	 */

	if (!info.num_fences)

		goto no_fences;



	if (info.num_fences < sync_file->num_fences)

		return -EINVAL;



	size = sync_file->num_fences * sizeof(*fence_info);

	fence_info = kzalloc(size, GFP_KERNEL);

	if (!fence_info)

		return -ENOMEM;



	for (i = 0; i < sync_file->num_fences; ++i)

		sync_fill_fence_info(sync_file->cbs[i].fence, &fence_info[i]);



	if (copy_to_user(u64_to_user_ptr(info.sync_fence_info), fence_info,

			 size)) {

		ret = -EFAULT;

		goto out;

	}



no_fences:

	strlcpy(info.name, sync_file->name, sizeof(info.name));

	info.status = atomic_read(&sync_file->status);

	if (info.status >= 0)

		info.status = !info.status;



	info.num_fences = sync_file->num_fences;



	if (copy_to_user((void __user *)arg, &info, sizeof(info)))

		ret = -EFAULT;

	else

		ret = 0;



out:

	kfree(fence_info);



	return ret;

}



static long sync_file_ioctl(struct file *file, unsigned int cmd,

			     unsigned long arg)

{

	struct sync_file *sync_file = file->private_data;



	switch (cmd) {

	case SYNC_IOC_MERGE:

		return sync_file_ioctl_merge(sync_file, arg);



	case SYNC_IOC_FILE_INFO:

		return sync_file_ioctl_fence_info(sync_file, arg);



	default:

		return -ENOTTY;

	}

}



static const struct file_operations sync_file_fops = {

	.release = sync_file_release,

	.poll = sync_file_poll,

	.unlocked_ioctl = sync_file_ioctl,

	.compat_ioctl = sync_file_ioctl,

};