dma_buf_fd(9) [centos man page]

DMA_BUF_FD(9)						   Device drivers infrastructure					     DMA_BUF_FD(9)

NAME

       dma_buf_fd - returns a file descriptor for the given dma_buf

SYNOPSIS

       int dma_buf_fd(struct dma_buf * dmabuf, int flags);

ARGUMENTS

       dmabuf
	   [in] pointer to dma_buf for which fd is required.

       flags
	   [in] flags to give to fd

DESCRIPTION

       On success, returns an associated 'fd'. Else, returns error.

COPYRIGHT

Kernel Hackers Manual 3.10					     June 2014							     DMA_BUF_FD(9)

DEVICE_CREATE(9)					   Device drivers infrastructure					  DEVICE_CREATE(9)

NAME

       device_create - creates a device and registers it with sysfs

SYNOPSIS

       struct device * device_create(struct class * class, struct device * parent, dev_t devt, void * drvdata, const char * fmt, ...);

ARGUMENTS

       class
	   pointer to the struct class that this device should be registered to

       parent
	   pointer to the parent struct device of this new device, if any

       devt
	   the dev_t for the char device to be added

       drvdata
	   the data to be added to the device for callbacks

       fmt
	   string for the device's name

       ...
	   variable arguments

DESCRIPTION

       This function can be used by char device classes. A struct device will be created in sysfs, registered to the specified class.

       A "dev" file will be created, showing the dev_t for the device, if the dev_t is not 0,0. If a pointer to a parent struct device is passed
       in, the newly created struct device will be a child of that device in sysfs. The pointer to the struct device will be returned from the
       call. Any further sysfs files that might be required can be created using this pointer.

       Returns struct device pointer on success, or ERR_PTR on error.

NOTE

       the struct class passed to this function must have previously been created with a call to class_create.

COPYRIGHT

Kernel Hackers Manual 3.10					     June 2014							  DEVICE_CREATE(9)