patch-2.1.112 linux/include/asm-alpha/smp_lock.h

• Lines: 121
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.1.111/linux/include/asm-alpha/smp_lock.h
• Orig date: Wed Apr 1 20:11:53 1998

diff -u --recursive --new-file v2.1.111/linux/include/asm-alpha/smp_lock.h linux/include/asm-alpha/smp_lock.h
@@ -1,120 +0,0 @@
-#ifndef __ALPHA_SMPLOCK_H
-#define __ALPHA_SMPLOCK_H
-
-#ifndef __SMP__
-
-#define lock_kernel()				do { } while(0)
-#define unlock_kernel()				do { } while(0)
-#define release_kernel_lock(task, cpu, depth)	((depth) = 1)
-#define reacquire_kernel_lock(task, cpu, depth)	do { } while (0)
-
-#else
-
-#include <asm/system.h>
-#include <asm/current.h>
-#include <asm/bitops.h>
-#include <asm/hardirq.h>
-
-#define kernel_lock_held() \
-  (klock_info.kernel_flag && (klock_info.akp == smp_processor_id()))
-
-/* Release global kernel lock and global interrupt lock */
-#define release_kernel_lock(task, cpu, depth)		\
-do {							\
-	if ((depth = (task)->lock_depth) != 0) {	\
-		__cli();				\
-		(task)->lock_depth = 0;			\
-		klock_info.akp = NO_PROC_ID;		\
-		klock_info.kernel_flag = 0;		\
-		mb();					\
-	}						\
-	release_irqlock(cpu);				\
-	__sti();					\
-} while (0)
-
-#if 1
-#define DEBUG_KERNEL_LOCK
-#else
-#undef DEBUG_KERNEL_LOCK
-#endif
-
-#ifdef DEBUG_KERNEL_LOCK
-extern void ___lock_kernel(klock_info_t *klip, int cpu, long ipl);
-#else /* DEBUG_KERNEL_LOCK */
-static inline void ___lock_kernel(klock_info_t *klip, int cpu, long ipl)
-{
-	long regx;
-
-	__asm__ __volatile__(
-	"1:	ldl_l	%1,%0;"
-	"	blbs	%1,6f;"
-	"	or	%1,1,%1;"
-	"	stl_c	%1,%0;"
-	"	beq	%1,6f;"
-	"4:	mb\n"
-	".section .text2,\"ax\"\n"
-	"6:	mov %4,$16;"
-	"	call_pal %3;"
-	"7:	ldl %1,%0;"
-	"	blbs %1,7b;"
-	"	bis $31,7,$16;"
-	"	call_pal %3;"
-	"	br 1b\n"
-	".previous"
-	: "=m,=m" (__dummy_lock(klip)), "=&r,=&r" (regx)
-	: "0,0" (__dummy_lock(klip)), "i,i" (PAL_swpipl), "i,r" (ipl)
-	: "$0", "$1", "$16", "$22", "$23", "$24", "$25", "memory"
-	);
-}
-#endif /* DEBUG_KERNEL_LOCK */
-
-#define reacquire_kernel_lock(task, cpu, depth)	\
-do {						\
-  if (depth) {					\
-    long ipl;					\
-    klock_info_t *klip = &klock_info;		\
-    __save_and_cli(ipl);			\
-    ___lock_kernel(klip, cpu, ipl);		\
-    klip->akp = cpu;				\
-    (task)->lock_depth = depth;			\
-    __restore_flags(ipl);			\
-  }						\
-} while (0)
-
-/* The following acquire and release the master kernel global lock,
- * the idea is that the usage of this mechanmism becomes less and less
- * as time goes on, to the point where they are no longer needed at all
- * and can thus disappear.
- */
-
-#define lock_kernel()				\
-if (current->lock_depth > 0) {			\
-     ++current->lock_depth;			\
-} else {					\
-  long ipl;					\
-  int cpu = smp_processor_id();			\
-  klock_info_t *klip = &klock_info;		\
-  __save_and_cli(ipl);				\
-  ___lock_kernel(klip, cpu, ipl);		\
-  klip->akp = cpu;				\
-  current->lock_depth = 1;			\
-  __restore_flags(ipl);				\
-}
-
-/* Release kernel global lock. */
-#define unlock_kernel()				\
-if (current->lock_depth > 1) {			\
-  --current->lock_depth;			\
-} else {					\
-  long ipl;					\
-  __save_and_cli(ipl);				\
-  klock_info.akp = NO_PROC_ID;			\
-  klock_info.kernel_flag = KLOCK_CLEAR;		\
-  mb();						\
-  current->lock_depth = 0;			\
-  __restore_flags(ipl);				\
-}  
-
-#endif /* __SMP__ */
-
-#endif /* __ALPHA_SMPLOCK_H */