Simplify the i386 asm MTX_{ENTER,EXIT} macros to just call the

appropriate function, rather than doing a horse-and-buggy
acquire.  They now take the mutex type as an arg and can be
used with sleep as well as spin mutexes.

3 files changed, 18 insertions, 111 deletions

diff --git a/sys/i386/i386/exception.s b/sys/i386/i386/exception.s
index 99b91d0..603b4be 100644
--- a/sys/i386/i386/exception.s
+++ b/sys/i386/i386/exception.s
@@ -37,8 +37,8 @@
 
 #include <machine/asmacros.h>
 #include <sys/ipl.h>
+#include <sys/mutex.h>
 #include <machine/lock.h>
-#include <machine/mutex.h>
 #include <machine/psl.h>
 #include <machine/trap.h>
 #ifdef SMP
@@ -293,7 +293,7 @@ IDTVEC(int0x80_syscall)
 	jmp	_doreti
 
 ENTRY(fork_trampoline)
- 	MTX_EXIT(_sched_lock, %ecx)
+ 	MTX_EXIT(_sched_lock, MTX_SPIN)
 	sti				/* XXX: we need this for kernel threads
 					   created very early before interrupts
 					   are enabled */
diff --git a/sys/i386/i386/genassym.c b/sys/i386/i386/genassym.c
index 82e5a54..eca44e0 100644
--- a/sys/i386/i386/genassym.c
+++ b/sys/i386/i386/genassym.c
@@ -231,10 +231,3 @@ ASSYM(VM86_FRAMESIZE, sizeof(struct vm86frame));
 ASSYM(MTX_LOCK, offsetof(struct mtx, mtx_lock));
 ASSYM(MTX_RECURSE, offsetof(struct mtx, mtx_recurse));
 ASSYM(MTX_SAVEINTR, offsetof(struct mtx, mtx_saveintr));
-#ifdef WITNESS
-ASSYM(MTX_DEBUG, offsetof(struct mtx, mtx_debug));
-ASSYM(MTXD_WITNESS, offsetof(struct mtx_debug, mtxd_witness));
-#endif
-
-ASSYM(MTX_UNOWNED, MTX_UNOWNED);
-ASSYM(MTX_SPIN, MTX_SPIN);
diff --git a/sys/i386/include/mutex.h b/sys/i386/include/mutex.h
index 61951fd..0e58108 100644
--- a/sys/i386/include/mutex.h
+++ b/sys/i386/include/mutex.h
@@ -253,110 +253,24 @@ extern char STR_SIEN[];
 #else	/* !LOCORE */
 
 /*
- * Simple assembly macros to get and release spin locks.
+ * Simple assembly macros to get and release mutexes.
  */
 
-#ifdef WITNESS
-#define	WITNESS_ENTER(lck, reg)						\
-	movl	lck+MTX_DEBUG,reg;					\
-	cmpl	$0,MTXD_WITNESS(reg);					\
-	jz	1f;							\
-	pushl	$0;							\
-	pushl	$0;							\
-	pushl	$MTX_SPIN;						\
-	pushl	$lck;							\
-	call	witness_enter;						\
-	addl	$0x10,%esp;						\
-1:
+#define	MTX_ENTER(lck, type)						\
+	pushl	$0 ;				/* dummy __LINE__ */	\
+	pushl	$0 ;				/* dummy __FILE__ */	\
+	pushl	$type ;							\
+	pushl	$lck ;							\
+	call	_mtx_enter ;						\
+	addl	$16,%esp
+
+#define	MTX_EXIT(lck, type)						\
+	pushl	$0 ;				/* dummy __LINE__ */	\
+	pushl	$0 ;				/* dummy __FILE__ */	\
+	pushl	$type ;							\
+	pushl	$lck ;							\
+	call	_mtx_exit ;						\
+	addl	$16,%esp
 
-#define	WITNESS_EXIT(lck, reg)						\
-	movl	lck+MTX_DEBUG,reg;					\
-	cmpl	$0,MTXD_WITNESS(reg);					\
-	jz	1f;							\
-	pushl	$0;							\
-	pushl	$0;							\
-	pushl	$MTX_SPIN;						\
-	pushl	$lck;							\
-	call	witness_exit;						\
-	addl	$0x10,%esp;						\
-1:
-
-#else
-#define	WITNESS_ENTER(lck, reg)
-#define	WITNESS_EXIT(lck, reg)
-#endif
-
-#if defined(I386_CPU)
-
-#define	MTX_ENTER(lck, reg)						\
-	movl	_curproc,reg;						\
-	pushfl;								\
-	cli;								\
-	movl	reg,lck+MTX_LOCK;					\
-	popl	lck+MTX_SAVEINTR;					\
-	WITNESS_ENTER(lck, reg)
-
-#define	MTX_EXIT(lck, reg)						\
-	WITNESS_EXIT(lck, reg)						\
-	pushl	lck+MTX_SAVEINTR;					\
-	movl	$ MTX_UNOWNED,lck+MTX_LOCK;				\
-	popfl;
-
-#else	/* I386_CPU */
-
-#define MTX_ENTER(lck, reg)						\
-	movl	_curproc,reg;						\
-	pushfl;								\
-	cli;								\
-9:	movl	$ MTX_UNOWNED,%eax;					\
-	MPLOCKED							\
-	cmpxchgl reg,lck+MTX_LOCK;					\
-	jnz	9b;							\
-	popl	lck+MTX_SAVEINTR;					\
-	WITNESS_ENTER(lck, reg)
-
-/* Must use locked bus op (cmpxchg) when setting to unowned (barrier) */
-#define	MTX_EXIT(lck, reg)						\
-	WITNESS_EXIT(lck, reg)						\
-	pushl	lck+MTX_SAVEINTR;					\
-	movl	lck+MTX_LOCK,%eax;					\
-	movl	$ MTX_UNOWNED,reg;					\
-	MPLOCKED							\
-	cmpxchgl reg,lck+MTX_LOCK;					\
-	popfl;
-
-#define MTX_ENTER_WITH_RECURSION(lck, reg)				\
-	pushf;								\
-	cli;								\
-	movl	lck+MTX_LOCK,%eax;					\
-	cmpl	_curproc,%eax;						\
-	jne	7f;							\
-	incl	lck+MTX_RECURSE;					\
-	jmp	8f;							\
-7:	movl	$ MTX_UNOWNED,%eax;					\
-	MPLOCKED							\
-	cmpxchgl reg,lck+MTX_LOCK;      				\
-	jnz	7b;							\
-	popl	lck+MTX_SAVEINTR;					\
-	jmp	9f;							\
-8:	add	$4,%esp;						\
-9:	WITNESS_ENTER(lck, reg)
-
-#define	MTX_EXIT_WITH_RECURSION(lck, reg)				\
-	WITNESS_EXIT(lck, reg)						\
-	movl	lck+MTX_RECURSE,%eax;					\
-	decl	%eax;							\
-	js	8f;							\
-	movl	%eax,lck+MTX_RECURSE;					\
-	jmp	9f;							\
-8:	pushl	lck+MTX_SAVEINTR;					\
-	movl	lck+MTX_LOCK,%eax;					\
-	movl	$ MTX_UNOWNED,reg;					\
-	MPLOCKED							\
-	cmpxchgl reg,lck+MTX_LOCK;					\
-	popf;								\
-9:
-
-#endif	/* I386_CPU */
 #endif	/* !LOCORE */
 #endif	/* __MACHINE_MUTEX_H */