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Message-Id: <1219740656-26458-5-git-send-email-tj@kernel.org>
Date: Tue, 26 Aug 2008 17:50:54 +0900
From: Tejun Heo <tj@...nel.org>
To: ericvh@...il.com, rminnich@...dia.gov,
v9fs-developer@...ts.sourceforge.net, linux-kernel@...r.kernel.org
Cc: Tejun Heo <tj@...nel.org>
Subject: [PATCH 4/6] 9p-trans_fd: don't do fs segment mangling in p9_fd_poll()
p9_fd_poll() is never called with user pointers and f_op->poll()
doesn't expect its arguments to be from userland. There's no need to
set kernel ds before calling f_op->poll() from p9_fd_poll(). Remove
it.
Signed-off-by: Tejun Heo <tj@...nel.org>
---
net/9p/trans_fd.c | 14 +++-----------
1 files changed, 3 insertions(+), 11 deletions(-)
diff --git a/net/9p/trans_fd.c b/net/9p/trans_fd.c
index 6c88e89..f6d4af1 100644
--- a/net/9p/trans_fd.c
+++ b/net/9p/trans_fd.c
@@ -1344,7 +1344,6 @@ p9_fd_poll(struct p9_trans *trans, struct poll_table_struct *pt)
{
int ret, n;
struct p9_trans_fd *ts = NULL;
- mm_segment_t oldfs;
if (trans && trans->status == Connected)
ts = trans->priv;
@@ -1358,24 +1357,17 @@ p9_fd_poll(struct p9_trans *trans, struct poll_table_struct *pt)
if (!ts->wr->f_op || !ts->wr->f_op->poll)
return -EIO;
- oldfs = get_fs();
- set_fs(get_ds());
-
ret = ts->rd->f_op->poll(ts->rd, pt);
if (ret < 0)
- goto end;
+ return ret;
if (ts->rd != ts->wr) {
n = ts->wr->f_op->poll(ts->wr, pt);
- if (n < 0) {
- ret = n;
- goto end;
- }
+ if (n < 0)
+ return n;
ret = (ret & ~POLLOUT) | (n & ~POLLIN);
}
-end:
- set_fs(oldfs);
return ret;
}
--
1.5.4.5
--
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