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[S390] s390: use simple_read_from_buffer() 

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Akinobu Mita 2008-07-14 09:59:16 +02:00 committed by Heiko Carstens
parent d9cef21af0
commit a29591c475
1 changed files with 10 additions and 19 deletions
arch/s390/hypfs
inode.c

29
arch/s390/hypfs/inode.c
View File

@ -150,33 +150,24 @@ static ssize_t hypfs_aio_read(struct kiocb *iocb, const struct iovec *iov,
unsigned long nr_segs, loff_t offset) unsigned long nr_segs, loff_t offset)
{ {
char *data; char *data;
size_t len; ssize_t ret;
struct file *filp = iocb->ki_filp; struct file *filp = iocb->ki_filp;
/* XXX: temporary */ /* XXX: temporary */
char __user *buf = iov[0].iov_base; char __user *buf = iov[0].iov_base;
size_t count = iov[0].iov_len; size_t count = iov[0].iov_len;
if (nr_segs != 1) { if (nr_segs != 1)
count = -EINVAL; return -EINVAL;
goto out;
}
data = filp->private_data; data = filp->private_data;
len = strlen(data); ret = simple_read_from_buffer(buf, count, &offset, data, strlen(data));
if (offset > len) { if (ret <= 0)
count = 0; return ret;
goto out;
} iocb->ki_pos += ret;
if (count > len - offset)
count = len - offset;
if (copy_to_user(buf, data + offset, count)) {
count = -EFAULT;
goto out;
}
iocb->ki_pos += count;
file_accessed(filp); file_accessed(filp);
out:
return count; return ret;
} }
static ssize_t hypfs_aio_write(struct kiocb *iocb, const struct iovec *iov, static ssize_t hypfs_aio_write(struct kiocb *iocb, const struct iovec *iov,
unsigned long nr_segs, loff_t offset) unsigned long nr_segs, loff_t offset)