xnu-792.6.22.tar.gz

[apple/xnu.git] / iokit / IOKit / ppc / IOSharedLockImp.h

diff --git a/iokit/IOKit/ppc/IOSharedLockImp.h b/iokit/IOKit/ppc/IOSharedLockImp.h
index c6c062fd57f58ac1db51ad3d438abab8a48ec33b..3644a328c120a2b64527999cdbc46395db1233e7 100644 (file)
--- a/iokit/IOKit/ppc/IOSharedLockImp.h
+++ b/iokit/IOKit/ppc/IOSharedLockImp.h
@@ -3,22 +3,19 @@
  *
  * @APPLE_LICENSE_HEADER_START@
  * 
- * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
+ * The contents of this file constitute Original Code as defined in and
+ * are subject to the Apple Public Source License Version 1.1 (the
+ * "License").  You may not use this file except in compliance with the
+ * License.  Please obtain a copy of the License at
+ * http://www.apple.com/publicsource and read it before using this file.
  * 
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
- * 
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * This Original Code and all software distributed under the License are
+ * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
- * limitations under the License.
+ * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
+ * License for the specific language governing rights and limitations
+ * under the License.
  * 
  * @APPLE_LICENSE_HEADER_END@
  */
@@ -57,33 +54,6 @@
 #include <mach/ppc/asm.h>
 #endif
 
-.macro DISABLE_PREEMPTION
-#ifdef KERNEL
-       stwu    r1,-(FM_SIZE)(r1)
-       mflr    r0
-       stw             r3,FM_ARG0(r1)
-       stw             r0,(FM_SIZE+FM_LR_SAVE)(r1)
-       bl              EXT(_disable_preemption)
-       lwz             r3,FM_ARG0(r1)
-       lwz             r1,0(r1)
-       lwz             r0,FM_LR_SAVE(r1)
-       mtlr    r0
-#endif
-.endmacro
-.macro ENABLE_PREEMPTION
-#ifdef KERNEL
-       stwu    r1,-(FM_SIZE)(r1)
-       mflr    r0
-       stw             r3,FM_ARG0(r1)
-       stw             r0,(FM_SIZE+FM_LR_SAVE)(r1)
-       bl              EXT(_enable_preemption)
-       lwz             r3,FM_ARG0(r1)
-       lwz             r1,0(r1)
-       lwz             r0,FM_LR_SAVE(r1)
-       mtlr    r0
-#endif
-.endmacro
-
 /*
  *     void
  *     ev_lock(p)
@@ -152,7 +122,6 @@ LEAF(_ev_unlock)
        sync
        li      a7,0
        stw     a7,0(a0)
-       ENABLE_PREEMPTION()
        blr
 END(_ev_unlock)
 
@@ -160,7 +129,6 @@ LEAF(_IOSpinUnlock)
        sync
        li      a7,0
        stw     a7,0(a0)
-       ENABLE_PREEMPTION()
        blr
 END(_IOSpinUnlock)
 
@@ -173,9 +141,6 @@ END(_IOSpinUnlock)
  */
 
 LEAF(_ev_try_lock)
-       
-               DISABLE_PREEMPTION()
-
                li              a6,1                    // lock value
                
                lwz             a7,0(a0)                // Get lock word
@@ -195,16 +160,12 @@ LEAF(_ev_try_lock)
                stwcx.  a7,a7,r1                // Kill reservation
 
 6:
-               ENABLE_PREEMPTION()
                li      a0,0                            // return FALSE
                blr
                
 END(_ev_try_lock)
 
 LEAF(_IOTrySpinLock)
-       
-               DISABLE_PREEMPTION()
-
                li              a6,1                    // lock value
                
                lwz             a7,0(a0)                // Get lock word
@@ -224,7 +185,6 @@ LEAF(_IOTrySpinLock)
                stwcx.  a7,a7,r1                // Kill reservation
 
 6:
-               ENABLE_PREEMPTION()
                li      a0,0                            // return FALSE
                blr