Factor shared code; prepare for adding 0-sized sentinel flip buffer.
Signed-off-by: Peter Hurley <[email protected]>
---
drivers/tty/tty_buffer.c | 21 ++++++++++++---------
1 file changed, 12 insertions(+), 9 deletions(-)
diff --git a/drivers/tty/tty_buffer.c b/drivers/tty/tty_buffer.c
index a5e3962..56d4602 100644
--- a/drivers/tty/tty_buffer.c
+++ b/drivers/tty/tty_buffer.c
@@ -22,6 +22,15 @@
#define MIN_TTYB_SIZE 256
#define TTYB_ALIGN_MASK 255
+static void tty_buffer_reset(struct tty_buffer *p, size_t size)
+{
+ p->used = 0;
+ p->size = size;
+ p->next = NULL;
+ p->commit = 0;
+ p->read = 0;
+}
+
/**
* tty_buffer_free_all - free buffers used by a tty
* @tty: tty to free from
@@ -70,11 +79,8 @@ static struct tty_buffer *tty_buffer_alloc(struct tty_port
*port, size_t size)
p = kmalloc(sizeof(struct tty_buffer) + 2 * size, GFP_ATOMIC);
if (p == NULL)
return NULL;
- p->used = 0;
- p->size = size;
- p->next = NULL;
- p->commit = 0;
- p->read = 0;
+
+ tty_buffer_reset(p, size);
port->buf.memory_used += size;
return p;
}
@@ -185,10 +191,7 @@ static struct tty_buffer *tty_buffer_find(struct tty_port
*port, size_t size)
struct tty_buffer *t = *tbh;
*tbh = t->next;
- t->next = NULL;
- t->used = 0;
- t->commit = 0;
- t->read = 0;
+ tty_buffer_reset(t, t->size);
port->buf.memory_used += t->size;
return t;
}
--
1.8.1.2
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