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authorPaul Fulghum <paulkf@microgate.com>2005-09-09 13:02:12 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2005-09-09 13:57:33 -0700
commit4a918bc233c8b9537fbc05a8bbb33928a4980cc5 (patch)
tree4ea5b278ce5f9c57c81feb88910cd107213eac16 /drivers/char/synclink.c
parent9d5c1e1bf2b906966609f8cf4a844e61adb86bcd (diff)
downloadop-kernel-dev-4a918bc233c8b9537fbc05a8bbb33928a4980cc5.zip
op-kernel-dev-4a918bc233c8b9537fbc05a8bbb33928a4980cc5.tar.gz
[PATCH] synclink.c: compiler optimisation fix
Make some fields of DMA descriptor volatile to prevent compiler optimizations. Signed-off-by: Paul Fulghum <paulkf@microgate.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/char/synclink.c')
-rw-r--r--drivers/char/synclink.c10
1 files changed, 5 insertions, 5 deletions
diff --git a/drivers/char/synclink.c b/drivers/char/synclink.c
index 37c8bea..747eb8d 100644
--- a/drivers/char/synclink.c
+++ b/drivers/char/synclink.c
@@ -1,7 +1,7 @@
/*
* linux/drivers/char/synclink.c
*
- * $Id: synclink.c,v 4.28 2004/08/11 19:30:01 paulkf Exp $
+ * $Id: synclink.c,v 4.37 2005/09/07 13:13:19 paulkf Exp $
*
* Device driver for Microgate SyncLink ISA and PCI
* high speed multiprotocol serial adapters.
@@ -141,9 +141,9 @@ static MGSL_PARAMS default_params = {
typedef struct _DMABUFFERENTRY
{
u32 phys_addr; /* 32-bit flat physical address of data buffer */
- u16 count; /* buffer size/data count */
- u16 status; /* Control/status field */
- u16 rcc; /* character count field */
+ volatile u16 count; /* buffer size/data count */
+ volatile u16 status; /* Control/status field */
+ volatile u16 rcc; /* character count field */
u16 reserved; /* padding required by 16C32 */
u32 link; /* 32-bit flat link to next buffer entry */
char *virt_addr; /* virtual address of data buffer */
@@ -896,7 +896,7 @@ module_param_array(txdmabufs, int, NULL, 0);
module_param_array(txholdbufs, int, NULL, 0);
static char *driver_name = "SyncLink serial driver";
-static char *driver_version = "$Revision: 4.28 $";
+static char *driver_version = "$Revision: 4.37 $";
static int synclink_init_one (struct pci_dev *dev,
const struct pci_device_id *ent);
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