--- zzzz-none-000/linux-2.4.17/include/asm-mips/smplock.h	2000-03-23 20:50:09.000000000 +0000
+++ sangam-fb-401/linux-2.4.17/include/asm-mips/smplock.h	2004-04-08 07:35:46.000000000 +0000
@@ -1,4 +1,4 @@
-/* $Id: smplock.h,v 1.2 1999/10/09 00:01:43 ralf Exp $
+/* $Id: smplock.h,v 1.1.1.1 2003/06/23 22:18:40 jharrell Exp $
  *
  * This file is subject to the terms and conditions of the GNU General Public
  * License.  See the file "COPYING" in the main directory of this archive
@@ -6,12 +6,32 @@
  *
  * Default SMP lock implementation
  */
+#include <linux/config.h>
 #include <linux/interrupt.h>
 #include <linux/spinlock.h>
 
 extern spinlock_t kernel_flag;
 
+#ifdef CONFIG_PREEMPT_TIMES
+#define lock_bkl() do { \
+	current->preempt_count++;  \
+	preempt_lock_start(3); \
+	_raw_spin_lock(&kernel_flag); \
+} while (0)
+#else
+#define lock_bkl() spin_lock(&kernel_flag)
+#endif
+#define unlock_bkl() spin_unlock(&kernel_flag)
+
+#ifdef CONFIG_SMP
 #define kernel_locked()		spin_is_locked(&kernel_flag)
+#else
+#ifdef CONFIG_PREEMPT
+#define kernel_locked()         preempt_is_disabled()
+#else
+#define kernel_locked()         1
+#endif
+#endif
 
 /*
  * Release global kernel lock and global interrupt lock
@@ -33,6 +53,19 @@
 		spin_lock(&kernel_flag); \
 } while (0)
 
+#ifdef CONFIG_PREEMPT_TIMES
+#define lock_kernel() do { \
+        if (current->lock_depth == -1) \
+                lock_bkl(); \
+        ++current->lock_depth; \
+} while (0)
+
+#define unlock_kernel() do { \
+        if (--current->lock_depth < 0) \
+                unlock_bkl(); \
+} while (0)
+
+#else	/* CONFIG_PREEMPT_TIMES */
 
 /*
  * Getting the big kernel lock.
@@ -43,8 +76,14 @@
  */
 extern __inline__ void lock_kernel(void)
 {
+#ifdef CONFIG_PREEMPT
+	if (current->lock_depth == -1)
+		spin_lock(&kernel_flag);
+	++current->lock_depth;
+#else
 	if (!++current->lock_depth)
 		spin_lock(&kernel_flag);
+#endif
 }
 
 extern __inline__ void unlock_kernel(void)
@@ -52,3 +91,4 @@
 	if (--current->lock_depth < 0)
 		spin_unlock(&kernel_flag);
 }
+#endif	/* CONFIG_PREEMPT_TIMES */