aio_read const struct iovec *

[Sergey Senozhatsky <sergey.senozhatsky@gmail.com>]

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Hello,
I have the following question:
struct file_operations {
	ssize_t (*read) (struct file *, char __user *, size_t, loff_t *);
	ssize_t (*write) (struct file *, const char __user *, size_t, loff_t *);
At the same time:
	ssize_t (*aio_read) (struct kiocb *, const struct iovec *, unsigned long, loff_t);
	ssize_t (*aio_write) (struct kiocb *, const struct iovec *, unsigned long, loff_t);

'const struct iovec *' both for aio_write and aio_read. 
And "char __user *" and "const char __user *" for read/write.

For example,
pipe_read(struct kiocb *iocb, const struct iovec *_iov,
	    unsigned long nr_segs, loff_t ppos)
{
	struct iovec *iov = (struct iovec *)_iov; 

Could we avoid 'struct iovec *iov = (struct iovec *)_iov;' by changing aio_read 'const struct iovec *'
 to 'struct iovec *'?


	Sergey

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