Hi,
Another simple sem2mutex conversion.
Cheers,
Jes
Convert to use a single mutex instead of two rwsems as this isn't
performance critical.
Signed-off-by: Jes Sorensen <[email protected]>
Signed-off-by: Brent Casavant <[email protected]>
----
drivers/sn/ioc4.c | 41 ++++++++++++++++++-----------------------
1 files changed, 18 insertions(+), 23 deletions(-)
Index: linux-2.6.15-quilt/drivers/sn/ioc4.c
===================================================================
--- linux-2.6.15-quilt.orig/drivers/sn/ioc4.c
+++ linux-2.6.15-quilt/drivers/sn/ioc4.c
@@ -31,7 +31,7 @@
#include <linux/ioc4.h>
#include <linux/mmtimer.h>
#include <linux/rtc.h>
-#include <linux/rwsem.h>
+#include <linux/mutex.h>
#include <asm/sn/addrs.h>
#include <asm/sn/clksupport.h>
#include <asm/sn/shub_mmr.h>
@@ -54,11 +54,10 @@
* Submodule management *
************************/
-static LIST_HEAD(ioc4_devices);
-static DECLARE_RWSEM(ioc4_devices_rwsem);
+static DEFINE_MUTEX(ioc4_mutex);
+static LIST_HEAD(ioc4_devices);
static LIST_HEAD(ioc4_submodules);
-static DECLARE_RWSEM(ioc4_submodules_rwsem);
/* Register an IOC4 submodule */
int
@@ -66,15 +65,13 @@
{
struct ioc4_driver_data *idd;
- down_write(&ioc4_submodules_rwsem);
+ mutex_lock(&ioc4_mutex);
list_add(&is->is_list, &ioc4_submodules);
- up_write(&ioc4_submodules_rwsem);
/* Initialize submodule for each IOC4 */
if (!is->is_probe)
- return 0;
+ goto out;
- down_read(&ioc4_devices_rwsem);
list_for_each_entry(idd, &ioc4_devices, idd_list) {
if (is->is_probe(idd)) {
printk(KERN_WARNING
@@ -84,8 +81,8 @@
pci_name(idd->idd_pdev));
}
}
- up_read(&ioc4_devices_rwsem);
-
+ out:
+ mutex_unlock(&ioc4_mutex);
return 0;
}
@@ -95,15 +92,13 @@
{
struct ioc4_driver_data *idd;
- down_write(&ioc4_submodules_rwsem);
+ mutex_lock(&ioc4_mutex);
list_del(&is->is_list);
- up_write(&ioc4_submodules_rwsem);
/* Remove submodule for each IOC4 */
if (!is->is_remove)
- return;
+ goto out;
- down_read(&ioc4_devices_rwsem);
list_for_each_entry(idd, &ioc4_devices, idd_list) {
if (is->is_remove(idd)) {
printk(KERN_WARNING
@@ -113,7 +108,8 @@
pci_name(idd->idd_pdev));
}
}
- up_read(&ioc4_devices_rwsem);
+ out:
+ mutex_unlock(&ioc4_mutex);
}
/*********************
@@ -312,12 +308,11 @@
/* Track PCI-device specific data */
idd->idd_serial_data = NULL;
pci_set_drvdata(idd->idd_pdev, idd);
- down_write(&ioc4_devices_rwsem);
+
+ mutex_lock(&ioc4_mutex);
list_add(&idd->idd_list, &ioc4_devices);
- up_write(&ioc4_devices_rwsem);
/* Add this IOC4 to all submodules */
- down_read(&ioc4_submodules_rwsem);
list_for_each_entry(is, &ioc4_submodules, is_list) {
if (is->is_probe && is->is_probe(idd)) {
printk(KERN_WARNING
@@ -327,7 +322,7 @@
pci_name(idd->idd_pdev));
}
}
- up_read(&ioc4_submodules_rwsem);
+ mutex_unlock(&ioc4_mutex);
return 0;
@@ -351,7 +346,7 @@
idd = pci_get_drvdata(pdev);
/* Remove this IOC4 from all submodules */
- down_read(&ioc4_submodules_rwsem);
+ mutex_lock(&ioc4_mutex);
list_for_each_entry(is, &ioc4_submodules, is_list) {
if (is->is_remove && is->is_remove(idd)) {
printk(KERN_WARNING
@@ -361,7 +356,7 @@
pci_name(idd->idd_pdev));
}
}
- up_read(&ioc4_submodules_rwsem);
+ mutex_unlock(&ioc4_mutex);
/* Release resources */
iounmap(idd->idd_misc_regs);
@@ -377,9 +372,9 @@
pci_disable_device(pdev);
/* Remove and free driver data */
- down_write(&ioc4_devices_rwsem);
+ mutex_lock(&ioc4_mutex);
list_del(&idd->idd_list);
- up_write(&ioc4_devices_rwsem);
+ mutex_unlock(&ioc4_mutex);
kfree(idd);
}
-
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