tty: Compute flip buffer ptrs
The char_buf_ptr and flag_buf_ptr values are trivially derived from
the .data field offset; compute values as needed.
Fixes a long-standing type-mismatch with the char and flag ptrs.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/tty/tty_buffer.c b/drivers/tty/tty_buffer.c
index ff1b2e3..170674c 100644
--- a/drivers/tty/tty_buffer.c
+++ b/drivers/tty/tty_buffer.c
@@ -71,8 +71,6 @@
p->next = NULL;
p->commit = 0;
p->read = 0;
- p->char_buf_ptr = (char *)(p->data);
- p->flag_buf_ptr = (unsigned char *)p->char_buf_ptr + size;
port->buf.memory_used += size;
return p;
}
@@ -265,8 +263,8 @@
if (unlikely(space == 0)) {
break;
}
- memcpy(tb->char_buf_ptr + tb->used, chars, space);
- memset(tb->flag_buf_ptr + tb->used, flag, space);
+ memcpy(char_buf_ptr(tb, tb->used), chars, space);
+ memset(flag_buf_ptr(tb, tb->used), flag, space);
tb->used += space;
copied += space;
chars += space;
@@ -303,8 +301,8 @@
if (unlikely(space == 0)) {
break;
}
- memcpy(tb->char_buf_ptr + tb->used, chars, space);
- memcpy(tb->flag_buf_ptr + tb->used, flags, space);
+ memcpy(char_buf_ptr(tb, tb->used), chars, space);
+ memcpy(flag_buf_ptr(tb, tb->used), flags, space);
tb->used += space;
copied += space;
chars += space;
@@ -364,8 +362,8 @@
int space = tty_buffer_request_room(port, size);
if (likely(space)) {
struct tty_buffer *tb = port->buf.tail;
- *chars = tb->char_buf_ptr + tb->used;
- memset(tb->flag_buf_ptr + tb->used, TTY_NORMAL, space);
+ *chars = char_buf_ptr(tb, tb->used);
+ memset(flag_buf_ptr(tb, tb->used), TTY_NORMAL, space);
tb->used += space;
}
return space;
@@ -394,8 +392,8 @@
int space = tty_buffer_request_room(port, size);
if (likely(space)) {
struct tty_buffer *tb = port->buf.tail;
- *chars = tb->char_buf_ptr + tb->used;
- *flags = tb->flag_buf_ptr + tb->used;
+ *chars = char_buf_ptr(tb, tb->used);
+ *flags = flag_buf_ptr(tb, tb->used);
tb->used += space;
}
return space;
@@ -407,8 +405,8 @@
receive_buf(struct tty_struct *tty, struct tty_buffer *head, int count)
{
struct tty_ldisc *disc = tty->ldisc;
- char *p = head->char_buf_ptr + head->read;
- unsigned char *f = head->flag_buf_ptr + head->read;
+ unsigned char *p = char_buf_ptr(head, head->read);
+ char *f = flag_buf_ptr(head, head->read);
if (disc->ops->receive_buf2)
count = disc->ops->receive_buf2(tty, p, f, count);