luck/tmp_suning_uos_patched
1
0
Fork 1
Code Issues Pull Requests Packages Projects Releases Wiki Activity

[PATCH] synclink.c: compiler optimisation fix

Browse Source 
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>
This commit is contained in:
Paul Fulghum 2005-09-09 13:02:12 -07:00 committed by Linus Torvalds
parent 9d5c1e1bf2
commit 4a918bc233
1 changed files with 5 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
drivers/char/synclink.c
View File

@ -1,7 +1,7 @@
/* /*
* linux/drivers/char/synclink.c * 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 * Device driver for Microgate SyncLink ISA and PCI
* high speed multiprotocol serial adapters. * high speed multiprotocol serial adapters.
@ -141,9 +141,9 @@ static MGSL_PARAMS default_params = {
typedef struct _DMABUFFERENTRY typedef struct _DMABUFFERENTRY
{ {
u32 phys_addr; /* 32-bit flat physical address of data buffer */ u32 phys_addr; /* 32-bit flat physical address of data buffer */
u16 count; /* buffer size/data count */ volatile u16 count; /* buffer size/data count */
u16 status; /* Control/status field */ volatile u16 status; /* Control/status field */
u16 rcc; /* character count field */ volatile u16 rcc; /* character count field */
u16 reserved; /* padding required by 16C32 */ u16 reserved; /* padding required by 16C32 */
u32 link; /* 32-bit flat link to next buffer entry */ u32 link; /* 32-bit flat link to next buffer entry */
char *virt_addr; /* virtual address of data buffer */ 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); module_param_array(txholdbufs, int, NULL, 0);
static char *driver_name = "SyncLink serial driver"; 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, static int synclink_init_one (struct pci_dev *dev,
const struct pci_device_id *ent); const struct pci_device_id *ent);