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9p: get rid of v9fs_direct_file_read()

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do it in ->direct_IO()...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2015-04-01 23:49:24 -04:00
parent e1200fe68f
commit 42b1ab979d
2 changed files with 12 additions and 51 deletions
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42
fs/9p/vfs_file.c
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@@ -575,44 +575,6 @@ out_unlock:
return VM_FAULT_NOPAGE;
}
static ssize_t
v9fs_direct_read(struct file *filp, char __user *udata, size_t count,
loff_t *offsetp)
{
loff_t size, offset;
struct inode *inode;
struct address_space *mapping;
offset = *offsetp;
mapping = filp->f_mapping;
inode = mapping->host;
if (!count)
return 0;
size = i_size_read(inode);
if (offset < size)
filemap_write_and_wait_range(mapping, offset,
offset + count - 1);
return v9fs_file_read(filp, udata, count, offsetp);
}
/**
* v9fs_cached_file_read - read from a file
* @filp: file pointer to read
* @data: user data buffer to read data into
* @count: size of buffer
* @offset: offset at which to read data
*
*/
static ssize_t
v9fs_cached_file_read(struct file *filp, char __user *data, size_t count,
loff_t *offset)
{
if (filp->f_flags & O_DIRECT)
return v9fs_direct_read(filp, data, count, offset);
return new_sync_read(filp, data, count, offset);
}
/**
* v9fs_mmap_file_read - read from a file
* @filp: file pointer to read
@@ -690,7 +652,7 @@ static const struct vm_operations_struct v9fs_mmap_file_vm_ops = {
const struct file_operations v9fs_cached_file_operations = {
.llseek = generic_file_llseek,
.read = v9fs_cached_file_read,
.read = new_sync_read,
.write = new_sync_write,
.read_iter = generic_file_read_iter,
.write_iter = generic_file_write_iter,
@@ -703,7 +665,7 @@ const struct file_operations v9fs_cached_file_operations = {
const struct file_operations v9fs_cached_file_operations_dotl = {
.llseek = generic_file_llseek,
.read = v9fs_cached_file_read,
.read = new_sync_read,
.write = new_sync_write,
.read_iter = generic_file_read_iter,
.write_iter = generic_file_write_iter,