From: sleybo <sleybo@ad392aa1-c5ef-ae45-8dd8-e69d62a5ef86>
Date: Wed, 7 Feb 2007 12:10:54 +0000 (+0000)
Subject: [COMPLIB] improve spinlocks to take a more efficient spinlock while at DPC level
X-Git-Url: https://openfabrics.org/gitweb/?a=commitdiff_plain;h=5ccfa0ec9bc8b5971556c64d1819d2e2a96bad67;p=~shefty%2Frdma-win.git

[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 54306bbf..bf6a4196 100644
--- 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( 
 	IN	cl_spinlock_t* const	p_spinlock )
 {
+	KIRQL irql = KeGetCurrentIrql();
 	CL_ASSERT( p_spinlock );
 
-	KeAcquireSpinLock( &p_spinlock->lock, &p_spinlock->irql );
+	if (irql == DISPATCH_LEVEL) {
+		KeAcquireSpinLockAtDpcLevel( &p_spinlock->lock );
+		p_spinlock->irql = irql;
+	}
+	else
+		KeAcquireSpinLock( &p_spinlock->lock, &p_spinlock->irql );
 }
 
 
@@ -100,7 +106,10 @@ cl_spinlock_release(
 {
 	CL_ASSERT( p_spinlock );
 
-	KeReleaseSpinLock( &p_spinlock->lock, p_spinlock->irql );
+	if (p_spinlock->irql == DISPATCH_LEVEL)
+		KeReleaseSpinLockFromDpcLevel( &p_spinlock->lock );
+	else
+		KeReleaseSpinLock( &p_spinlock->lock, p_spinlock->irql );
 }