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authorAl Viro <viro@ftp.linux.org.uk>2006-10-10 22:46:57 +0100
committerLinus Torvalds <torvalds@g5.osdl.org>2006-10-10 15:37:22 -0700
commitba2397efe10ba728c7ff22b179e218c292227c13 (patch)
tree00e55bb4ec8c27c522d78a51e1a3f42fb6177fce /kernel/relay.c
parentfb136e97840872638cb08588c4c9b9fff7f7c456 (diff)
downloadlinux-2.6.34-ux500-ba2397efe10ba728c7ff22b179e218c292227c13.tar.gz
[PATCH] make kernel/relay.c __user-clean
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'kernel/relay.c')
-rw-r--r--kernel/relay.c41
1 files changed, 22 insertions, 19 deletions
diff --git a/kernel/relay.c b/kernel/relay.c
index 1d63ecddfa7..f04bbdb56ac 100644
--- a/kernel/relay.c
+++ b/kernel/relay.c
@@ -887,7 +887,7 @@ static int subbuf_read_actor(size_t read_start,
from = buf->start + read_start;
ret = avail;
- if (copy_to_user(desc->arg.data, from, avail)) {
+ if (copy_to_user(desc->arg.buf, from, avail)) {
desc->error = -EFAULT;
ret = 0;
}
@@ -946,24 +946,17 @@ typedef int (*subbuf_actor_t) (size_t read_start,
*/
static inline ssize_t relay_file_read_subbufs(struct file *filp,
loff_t *ppos,
- size_t count,
subbuf_actor_t subbuf_actor,
read_actor_t actor,
- void *target)
+ read_descriptor_t *desc)
{
struct rchan_buf *buf = filp->private_data;
size_t read_start, avail;
- read_descriptor_t desc;
int ret;
- if (!count)
+ if (!desc->count)
return 0;
- desc.written = 0;
- desc.count = count;
- desc.arg.data = target;
- desc.error = 0;
-
mutex_lock(&filp->f_dentry->d_inode->i_mutex);
do {
if (!relay_file_read_avail(buf, *ppos))
@@ -974,19 +967,19 @@ static inline ssize_t relay_file_read_subbufs(struct file *filp,
if (!avail)
break;
- avail = min(desc.count, avail);
- ret = subbuf_actor(read_start, buf, avail, &desc, actor);
- if (desc.error < 0)
+ avail = min(desc->count, avail);
+ ret = subbuf_actor(read_start, buf, avail, desc, actor);
+ if (desc->error < 0)
break;
if (ret) {
relay_file_read_consume(buf, read_start, ret);
*ppos = relay_file_read_end_pos(buf, read_start, ret);
}
- } while (desc.count && ret);
+ } while (desc->count && ret);
mutex_unlock(&filp->f_dentry->d_inode->i_mutex);
- return desc.written;
+ return desc->written;
}
static ssize_t relay_file_read(struct file *filp,
@@ -994,8 +987,13 @@ static ssize_t relay_file_read(struct file *filp,
size_t count,
loff_t *ppos)
{
- return relay_file_read_subbufs(filp, ppos, count, subbuf_read_actor,
- NULL, buffer);
+ read_descriptor_t desc;
+ desc.written = 0;
+ desc.count = count;
+ desc.arg.buf = buffer;
+ desc.error = 0;
+ return relay_file_read_subbufs(filp, ppos, subbuf_read_actor,
+ NULL, &desc);
}
static ssize_t relay_file_sendfile(struct file *filp,
@@ -1004,8 +1002,13 @@ static ssize_t relay_file_sendfile(struct file *filp,
read_actor_t actor,
void *target)
{
- return relay_file_read_subbufs(filp, ppos, count, subbuf_send_actor,
- actor, target);
+ read_descriptor_t desc;
+ desc.written = 0;
+ desc.count = count;
+ desc.arg.data = target;
+ desc.error = 0;
+ return relay_file_read_subbufs(filp, ppos, subbuf_send_actor,
+ actor, &desc);
}
struct file_operations relay_file_operations = {