|
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH 3/3] Add legacy kref support
In kernels <= 2.6.5 kref_init, and kref_put had a different interface. This patch allows for older kernels to compile with the older interface. This patch applies against the linux-2.6.18-xen.hg tree Signed-off-by: Ben Guthro <bguthro@xxxxxxxxxxxxxxx> diff -r fe774d9684dd drivers/xen/netfront/accel.c
--- a/drivers/xen/netfront/accel.c Tue Aug 14 12:34:34 2007 -0400
+++ b/drivers/xen/netfront/accel.c Wed Aug 15 11:17:00 2007 -0400
@@ -45,6 +45,12 @@
#define WPRINTK(fmt, args...) \
printk(KERN_WARNING "netfront/accel: " fmt, ##args)
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 5)
+#define KREF_PUT(x,y) kref_put(x)
+#else
+#define KREF_PUT(x,y) kref_put(x,y)
+#endif
+
/*
* List of all netfront accelerator plugin modules available. Each
* list entry is of type struct netfront_accelerator.
@@ -59,7 +65,6 @@ static spinlock_t accelerators_lock;
/* Forward declaration of kref cleanup functions */
static void accel_kref_release(struct kref *ref);
static void vif_kref_release(struct kref *ref);
-
void netif_init_accel(void)
{
@@ -176,7 +181,11 @@ accelerator_set_vif_state_hooks(struct n
*/
kref_get(&vif_state->np->accelerator->accel_kref);
/* This persists until vif_state->hooks are cleared */
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 5)
+ kref_init(&vif_state->vif_kref,vif_kref_release);
+#else
kref_init(&vif_state->vif_kref);
+#endif
/* Make sure there are no data path operations going on */
netif_poll_disable(vif_state->np->netdev);
@@ -218,7 +227,7 @@ static void accelerator_probe_new_vif(st
hooks->new_device(np->netdev, dev);
- kref_put(&accelerator->accel_kref,
+ KREF_PUT(&accelerator->accel_kref,
accel_kref_release);
/*
* Hooks will get linked into vif_state by a
@@ -318,8 +327,11 @@ accelerator_probe_vifs(struct netfront_a
* persist until the accelerator hooks are removed (e.g. by
* accelerator module unload)
*/
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 5)
+ kref_init(&accelerator->accel_kref,accel_kref_release);
+#else
kref_init(&accelerator->accel_kref);
-
+#endif
/*
* Store the hooks for future calls to probe a new device, and
* to wire into the vif_state once the accelerator plugin is
@@ -345,7 +357,7 @@ accelerator_probe_vifs(struct netfront_a
hooks->new_device(np->netdev, vif_state->dev);
- kref_put(&accelerator->accel_kref, accel_kref_release);
+ KREF_PUT(&accelerator->accel_kref, accel_kref_release);
/* Retake lock for next go round the loop */
spin_lock_irqsave(&accelerator->vif_states_lock,
lock_flags);
@@ -510,7 +522,7 @@ static void accelerator_remove_hooks(str
* were set, must be called without lock held
*/
spin_unlock_irqrestore(&accelerator->vif_states_lock, flags);
- kref_put(&vif_state->vif_kref, vif_kref_release);
+ KREF_PUT(&vif_state->vif_kref, vif_kref_release);
spin_lock_irqsave(&accelerator->vif_states_lock, flags);
}
@@ -521,7 +533,7 @@ static void accelerator_remove_hooks(str
if(remove_master)
/* Remove the reference taken when module loaded */
- kref_put(&accelerator->accel_kref, accel_kref_release);
+ KREF_PUT(&accelerator->accel_kref, accel_kref_release);
}
@@ -585,7 +597,7 @@ int netfront_check_accelerator_queue_bus
rc = np->accel_vif_state.hooks->check_busy(dev);
- kref_put(&np->accel_vif_state.vif_kref,
+ KREF_PUT(&np->accel_vif_state.vif_kref,
vif_kref_release);
} else {
spin_unlock_irqrestore
@@ -620,7 +632,7 @@ int netfront_accelerator_call_remove(str
rc = np->accel_vif_state.hooks->remove(dev);
- kref_put(&np->accel_vif_state.vif_kref,
+ KREF_PUT(&np->accel_vif_state.vif_kref,
vif_kref_release);
} else {
spin_unlock_irqrestore
@@ -656,7 +668,7 @@ int netfront_accelerator_call_suspend(st
rc = np->accel_vif_state.hooks->suspend(dev);
- kref_put(&np->accel_vif_state.vif_kref,
+ KREF_PUT(&np->accel_vif_state.vif_kref,
vif_kref_release);
} else {
spin_unlock_irqrestore
@@ -693,7 +705,7 @@ int netfront_accelerator_call_suspend_ca
rc = np->accel_vif_state.hooks->suspend_cancel(dev);
- kref_put(&np->accel_vif_state.vif_kref,
+ KREF_PUT(&np->accel_vif_state.vif_kref,
vif_kref_release);
} else {
spin_unlock_irqrestore
@@ -727,7 +739,7 @@ int netfront_accelerator_call_resume(str
rc = np->accel_vif_state.hooks->resume(dev);
- kref_put(&np->accel_vif_state.vif_kref,
+ KREF_PUT(&np->accel_vif_state.vif_kref,
vif_kref_release);
} else {
spin_unlock_irqrestore
@@ -762,7 +774,7 @@ void netfront_accelerator_call_backend_c
np->accel_vif_state.hooks->backend_changed
(dev, backend_state);
- kref_put(&np->accel_vif_state.vif_kref,
+ KREF_PUT(&np->accel_vif_state.vif_kref,
vif_kref_release);
} else {
spin_unlock_irqrestore
@@ -796,7 +808,7 @@ void netfront_accelerator_call_stop_napi
np->accel_vif_state.hooks->stop_napi_irq(dev);
- kref_put(&np->accel_vif_state.vif_kref,
+ KREF_PUT(&np->accel_vif_state.vif_kref,
vif_kref_release);
} else {
spin_unlock_irqrestore
@@ -807,7 +819,7 @@ void netfront_accelerator_call_stop_napi
/*
- * Once all users of hooks have kref_put()'d we can signal that it's
+ * Once all users of hooks have KREF_PUT()'d we can signal that it's
* safe to unload
*/
static void accel_kref_release(struct kref *ref)
@@ -834,7 +846,6 @@ static void accel_kref_release(struct kr
spin_unlock_irqrestore(&accelerator->vif_states_lock, flags);
}
-
static void vif_kref_release(struct kref *ref)
{
struct netfront_accel_vif_state *vif_state =
@@ -848,7 +859,7 @@ static void vif_kref_release(struct kref
* Now that this vif has finished using the hooks, it can
* decrement the accelerator's global copy ref count
*/
- kref_put(&vif_state->np->accelerator->accel_kref, accel_kref_release);
+ KREF_PUT(&vif_state->np->accelerator->accel_kref, accel_kref_release);
spin_lock_irqsave(&vif_state->np->accelerator->vif_states_lock, flags);
if (vif_state->need_probe) {
@@ -864,3 +875,4 @@ static void vif_kref_release(struct kref
}
}
+
_______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
|
 |
Lists.xenproject.org is hosted with RackSpace, monitoring our |