Commit e519e777 authored by Al Viro's avatar Al Viro

splice: remove detritus from generic_file_splice_read()

i_size check is a leftover from the horrors that used to play with
the page cache in that function.  With the switch to ->read_iter(),
it's neither needed nor correct - for gfs2 it ends up being buggy,
since i_size is not guaranteed to be correct until later (inside
->read_iter()).
Spotted-by: default avatarAbhi Das <adas@redhat.com>
Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent 6d6d36bc
...@@ -299,13 +299,8 @@ ssize_t generic_file_splice_read(struct file *in, loff_t *ppos, ...@@ -299,13 +299,8 @@ ssize_t generic_file_splice_read(struct file *in, loff_t *ppos,
{ {
struct iov_iter to; struct iov_iter to;
struct kiocb kiocb; struct kiocb kiocb;
loff_t isize;
int idx, ret; int idx, ret;
isize = i_size_read(in->f_mapping->host);
if (unlikely(*ppos >= isize))
return 0;
iov_iter_pipe(&to, ITER_PIPE | READ, pipe, len); iov_iter_pipe(&to, ITER_PIPE | READ, pipe, len);
idx = to.idx; idx = to.idx;
init_sync_kiocb(&kiocb, in); init_sync_kiocb(&kiocb, in);
......
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