patch-2.1.34 linux/include/asm-sparc64/smp_lock.h

• Lines: 60
• Date: Fri Apr 11 10:47:40 1997
• Orig file: v2.1.33/linux/include/asm-sparc64/smp_lock.h
• Orig date: Thu Mar 27 14:40:09 1997

diff -u --recursive --new-file v2.1.33/linux/include/asm-sparc64/smp_lock.h linux/include/asm-sparc64/smp_lock.h
@@ -11,53 +11,14 @@
 #include <asm/pgtable.h>
 
 #ifndef __SMP__
-#define lock_kernel()           do { } while(0)
-#define unlock_kernel()         do { } while(0)
-#else
-
-extern __inline__ __volatile__ unsigned char ldstub(volatile unsigned char *lock)
-{
-	volatile unsigned char retval;
-
-	__asm__ __volatile__("ldstub [%1], %0" : "=&r" (retval) : "r" (lock));
-	return retval;
-}
-
-/*
- *	Locking the kernel 
- */
 
-/* Knock knock... */
-extern __inline__ void lock_kernel(void)
-{
-	int proc = smp_processor_id();
-
-	while(ldstub(&kernel_flag)) {
-		if(proc == active_kernel_processor)
-			break;
-		do {
-#ifdef __SMP_PROF__		
-			smp_spins[smp_processor_id()]++;
-#endif			
-			barrier();
-		} while(kernel_flag); /* Don't lock the bus more than we have to. */
-	}
-	active_kernel_processor = proc;
-	kernel_counter++;
-}
-
-/* I want out... */
-extern __inline__ void unlock_kernel(void)
-{
-	if(kernel_counter == 0)
-		panic("Bogus kernel counter.\n");
-
-	if(!--kernel_counter) {
-		active_kernel_processor = NO_PROC_ID;
-		kernel_flag = KLOCK_CLEAR;
-	}
-}
+#define lock_kernel()				do { } while(0)
+#define unlock_kernel()				do { } while(0)
+#define release_kernel_lock(task, cpu, depth)	((depth) = 1)
+#define reaquire_kernel_lock(task, cpu, depth)	do { } while(0)
 
+#else
+#error SMP on sparc64 not supported yet
 #endif /* (__SMP__) */
 
 #endif /* !(__SPARC64_SMPLOCK_H) */