[COMPLIB] improve spinlocks to take a more efficient spinlock while at DPC level

git-svn-id: svn://openib.tc.cornell.edu/gen1@579 ad392aa1-c5ef-ae45-8dd8-e69d62a5ef86

diff --git a/trunk/inc/kernel/complib/cl_spinlock_osd.h b/trunk/inc/kernel/complib/cl_spinlock_osd.h
index 54306bbfc78adc243439becc6c146f3acdf46a4e..bf6a41960b39a9aaaf9bf0093aa3e7402711f35e 100644 (file)
--- a/trunk/inc/kernel/complib/cl_spinlock_osd.h
+++ b/trunk/inc/kernel/complib/cl_spinlock_osd.h
@@ -88,9 +88,15 @@ CL_INLINE void
 cl_spinlock_acquire( \r
        IN      cl_spinlock_t* const    p_spinlock )\r
 {\r
+       KIRQL irql = KeGetCurrentIrql();\r
        CL_ASSERT( p_spinlock );\r
 \r
-       KeAcquireSpinLock( &p_spinlock->lock, &p_spinlock->irql );\r
+       if (irql == DISPATCH_LEVEL) {\r
+               KeAcquireSpinLockAtDpcLevel( &p_spinlock->lock );\r
+               p_spinlock->irql = irql;\r
+       }\r
+       else\r
+               KeAcquireSpinLock( &p_spinlock->lock, &p_spinlock->irql );\r
 }\r
 \r
 \r
@@ -100,7 +106,10 @@ cl_spinlock_release(
 {\r
        CL_ASSERT( p_spinlock );\r
 \r
-       KeReleaseSpinLock( &p_spinlock->lock, p_spinlock->irql );\r
+       if (p_spinlock->irql == DISPATCH_LEVEL)\r
+               KeReleaseSpinLockFromDpcLevel( &p_spinlock->lock );\r
+       else\r
+               KeReleaseSpinLock( &p_spinlock->lock, p_spinlock->irql );\r
 }\r
 \r
 \r