compat_cdrom_read_audio

Name:compat_cdrom_read_audio

Proto:static int compat_cdrom_read_audio(struct block_device *bdev, fmode_t mode, unsigned int cmd, unsigned long arg)

Type:int

Parameter:

Type	Parameter	Name
struct block_device *	bdev
fmode_t	mode
unsigned int	cmd
unsigned long	arg

121

__user * cdread_audio

122

__user * cdread_audio32

124

126

cdread_audio = Allocate user-space memory for the duration of a single system call,* in order to marshall parameters inside a compat thunk.

127

cdread_audio32 = A pointer passed in from user mode. This should not* be used for syscall parameters, just declare them* as pointers because the syscall entry code will have* appropriately converted them already.

129

If copy_in_user( & ame address , & addr, ( size of cdread_audio32 - sizeof(compat_caddr_t))) Then Return -EFAULT

135

If Get a simple variable from user space(data, & buf) Then Return -EFAULT

137

datap = A pointer passed in from user mode. This should not* be used for syscall parameters, just declare them* as pointers because the syscall entry code will have* appropriately converted them already.

138

If Write a simple value into user space(datap, & ame buffer (size: nframes*2352 bytes) ) Then Return -EFAULT

141

Return __blkdev_driver_ioctl(bdev, mode, cmd, (unsignedlong)cdread_audio)

**Caller**
Name	Describe
compat_blkdev_driver_ioctl

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