From: Jan Beulich <jbeulich@suse.com>
Date: Fri, 27 Jul 2012 07:57:20 +0000 (+0200)
Subject: serial: don't waste space allocated for the tx buffer(s)
X-Git-Tag: archive/raspbian/4.8.0-1+rpi1~1^2~8118
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=7e45ec6a46a9c2026e6148c0020a92ce29b5d12e;p=xen.git

serial: don't waste space allocated for the tx buffer(s)

We're allocating minimally a full page, so no reason to not also use
all that space.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Keir Fraser <keir@xen.org>
---

diff --git a/xen/drivers/char/serial.c b/xen/drivers/char/serial.c
index 8591ae28fd..fa47d3a3e4 100644
--- a/xen/drivers/char/serial.c
+++ b/xen/drivers/char/serial.c
@@ -483,8 +483,8 @@ void __init serial_async_transmit(struct serial_port *port)
     BUG_ON(!port->driver->tx_empty);
     if ( port->txbuf != NULL )
         return;
-    if ( serial_txbufsz < 512 )
-        serial_txbufsz = 512;
+    if ( serial_txbufsz < PAGE_SIZE )
+        serial_txbufsz = PAGE_SIZE;
     while ( serial_txbufsz & (serial_txbufsz - 1) )
         serial_txbufsz &= serial_txbufsz - 1;
     port->txbuf = alloc_xenheap_pages(