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Compat wireless breaks on kernels prior to 2.6.34 with the RT PREEMPT patch

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Hi,

Compat wireless seems to not work with the RT PREEMPT patch for
kernels prior to 2.6.34 because struct device does not contain sem. I
would love to submit a patch like the one below, but I do not know how
to detect that the RT PREEMPT patch has been applied. Does anybody
happen to know?

Thanks,
Blaise

--- compat-wireless-2010-10-09/include/linux/compat-2.6.34.h
2010-10-21 19:26:34.172694358 -0700
+++ compat-wireless-2010-10-09-original/include/linux/compat-2.6.34.h
 2010-10-21 19:23:10.494696161 -0700
@@ -139,32 +139,20 @@
 #endif
 /* source: include/linux/netdevice.h */

 static inline void device_lock(struct device *dev)
 {
-#ifdef XXX
-        mutex_lock(&dev->parent->mutex);
-#else
        down(&dev->sem);
-#endif
 }

 static inline int device_trylock(struct device *dev)
 {
-#ifdef XXX
-        return mutex_trylock(&dev->mutex);
-#else
        return down_trylock(&dev->sem);
-#endif
 }

 static inline void device_unlock(struct device *dev)
 {
-#ifdef XXX
-        mutex_unlock(&dev->mutex);
-#else
        up(&dev->sem);
-#endif
 }

 #if defined(CONFIG_PCMCIA) || defined(CONFIG_PCMCIA_MODULE)
--
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