From d221c44b7afefd8f77f8595af468dfacb3b21cc2 Mon Sep 17 00:00:00 2001
From: Ralf Baechle <ralf@linux-mips.org>
Date: Tue, 22 Jun 1999 23:49:01 +0000
Subject: Merge with Linux 2.3.8.

---
 include/asm-alpha/atomic.h      |   2 +
 include/asm-alpha/bitops.h      |   3 +
 include/asm-alpha/init.h        |   2 +
 include/asm-alpha/io.h          |   7 +-
 include/asm-alpha/machvec.h     |   1 -
 include/asm-alpha/mmu_context.h | 110 +++++++++++++++++--------------
 include/asm-alpha/page.h        |   9 +++
 include/asm-alpha/processor.h   |  17 +++--
 include/asm-alpha/smp.h         |   1 +
 include/asm-alpha/softirq.h     |  69 +++++++++++--------
 include/asm-alpha/spinlock.h    |  88 ++++++++++++++++---------
 include/asm-alpha/system.h      | 143 +++++++++++++++++++++-------------------
 include/asm-i386/spinlock.h     |   6 +-
 include/asm-mips/spinlock.h     |  10 +--
 include/linux/fs.h              |   1 -
 include/linux/pagemap.h         |   1 +
 include/linux/swap.h            |  12 +---
 17 files changed, 277 insertions(+), 205 deletions(-)

(limited to 'include')

diff --git a/include/asm-alpha/atomic.h b/include/asm-alpha/atomic.h
index 2dccf3521..67b74d356 100644
--- a/include/asm-alpha/atomic.h
+++ b/include/asm-alpha/atomic.h
@@ -75,6 +75,7 @@ extern __inline__ long atomic_add_return(int i, atomic_t * v)
 	"	mov %0,%2\n"
 	"	stl_c %0,%1\n"
 	"	beq %0,2f\n"
+	"	mb\n"
 	".section .text2,\"ax\"\n"
 	"2:	br 1b\n"
 	".previous"
@@ -92,6 +93,7 @@ extern __inline__ long atomic_sub_return(int i, atomic_t * v)
 	"	mov %0,%2\n"
 	"	stl_c %0,%1\n"
 	"	beq %0,2f\n"
+	"	mb\n"
 	".section .text2,\"ax\"\n"
 	"2:	br 1b\n"
 	".previous"
diff --git a/include/asm-alpha/bitops.h b/include/asm-alpha/bitops.h
index adaf2fac2..c9e7e7aee 100644
--- a/include/asm-alpha/bitops.h
+++ b/include/asm-alpha/bitops.h
@@ -90,6 +90,7 @@ extern __inline__ unsigned long test_and_set_bit(unsigned long nr,
 	"	xor %0,%3,%0\n"
 	"	stl_c %0,%1\n"
 	"	beq %0,3f\n"
+	"	mb\n"
 	"2:\n"
 	".section .text2,\"ax\"\n"
 	"3:	br 1b\n"
@@ -114,6 +115,7 @@ extern __inline__ unsigned long test_and_clear_bit(unsigned long nr,
 	"	xor %0,%3,%0\n"
 	"	stl_c %0,%1\n"
 	"	beq %0,3f\n"
+	"	mb\n"
 	"2:\n"
 	".section .text2,\"ax\"\n"
 	"3:	br 1b\n"
@@ -137,6 +139,7 @@ extern __inline__ unsigned long test_and_change_bit(unsigned long nr,
 	"	xor %0,%3,%0\n"
 	"	stl_c %0,%1\n"
 	"	beq %0,3f\n"
+	"	mb\n"
 	".section .text2,\"ax\"\n"
 	"3:	br 1b\n"
 	".previous"
diff --git a/include/asm-alpha/init.h b/include/asm-alpha/init.h
index a85501cbb..f343aecd3 100644
--- a/include/asm-alpha/init.h
+++ b/include/asm-alpha/init.h
@@ -1,6 +1,7 @@
 #ifndef _ALPHA_INIT_H
 #define _ALPHA_INIT_H
 
+#ifndef MODULE
 #define __init __attribute__ ((__section__ (".text.init")))
 #define __initdata __attribute__ ((__section__ (".data.init")))
 #define __initfunc(__arginit) \
@@ -11,6 +12,7 @@
 #define __INIT		.section	.text.init,"ax"
 #define __FINIT		.previous
 #define __INITDATA	.section	.data.init,"a"
+#endif
 
 #define __cacheline_aligned __attribute__((__aligned__(32)))
 
diff --git a/include/asm-alpha/io.h b/include/asm-alpha/io.h
index f908f7464..5ba356f61 100644
--- a/include/asm-alpha/io.h
+++ b/include/asm-alpha/io.h
@@ -29,15 +29,16 @@
  */
 static inline void __set_hae(unsigned long new_hae)
 {
-	unsigned long ipl = swpipl(7);
+	unsigned long flags;
+	__save_and_cli(flags);
 
 	alpha_mv.hae_cache = new_hae;
 	*alpha_mv.hae_register = new_hae;
 	mb();
-
 	/* Re-read to make sure it was written.  */
 	new_hae = *alpha_mv.hae_register;
-	setipl(ipl);
+
+	__restore_flags(flags);
 }
 
 static inline void set_hae(unsigned long new_hae)
diff --git a/include/asm-alpha/machvec.h b/include/asm-alpha/machvec.h
index 035ffa4e2..587fa8a3e 100644
--- a/include/asm-alpha/machvec.h
+++ b/include/asm-alpha/machvec.h
@@ -32,7 +32,6 @@ struct alpha_machine_vector
 	int rtc_port;
 	int max_asn;
 	unsigned long max_dma_address;
-	unsigned long mmu_context_mask;
 	unsigned long irq_probe_mask;
 	unsigned long iack_sc;
 
diff --git a/include/asm-alpha/mmu_context.h b/include/asm-alpha/mmu_context.h
index 03aa3c6d2..7b800d156 100644
--- a/include/asm-alpha/mmu_context.h
+++ b/include/asm-alpha/mmu_context.h
@@ -49,31 +49,24 @@
 # endif
 #endif
 
-#ifdef __SMP__
-#define WIDTH_THIS_PROCESSOR	5
 /*
- * last_asn[processor]:
+ * cpu_last_asn(processor):
  * 63                                            0
  * +-------------+----------------+--------------+
  * | asn version | this processor | hardware asn |
  * +-------------+----------------+--------------+
  */
-extern unsigned long last_asn[];
-#define asn_cache last_asn[p->processor]
 
+#ifdef __SMP__
+#include <asm/smp.h>
+#define cpu_last_asn(cpuid)	(cpu_data[cpuid].last_asn)
 #else
-#define WIDTH_THIS_PROCESSOR	0
-/*
- * asn_cache:
- * 63                                            0
- * +------------------------------+--------------+
- * |         asn version          | hardware asn |
- * +------------------------------+--------------+
- */
-extern unsigned long asn_cache;
+extern unsigned long last_asn;
+#define cpu_last_asn(cpuid)	last_asn
 #endif /* __SMP__ */
 
 #define WIDTH_HARDWARE_ASN	8
+#define WIDTH_THIS_PROCESSOR	5
 #define ASN_FIRST_VERSION (1UL << (WIDTH_THIS_PROCESSOR + WIDTH_HARDWARE_ASN))
 #define HARDWARE_ASN_MASK ((1UL << WIDTH_HARDWARE_ASN) - 1)
 
@@ -96,20 +89,46 @@ extern unsigned long asn_cache;
 
 extern void get_new_mmu_context(struct task_struct *p, struct mm_struct *mm);
 
-__EXTERN_INLINE void ev4_get_mmu_context(struct task_struct *p)
+static inline unsigned long
+__get_new_mmu_context(struct task_struct *p, struct mm_struct *mm)
 {
-	/* As described, ASN's are broken.  */
+	unsigned long asn = cpu_last_asn(smp_processor_id());
+	unsigned long next = asn + 1;
+
+	if ((next ^ asn) & ~MAX_ASN) {
+		tbiap();
+		next = (asn & ~HARDWARE_ASN_MASK) + ASN_FIRST_VERSION;
+	}
+	cpu_last_asn(smp_processor_id()) = next;
+	mm->context = next;                      /* full version + asn */
+	return next;
 }
 
-__EXTERN_INLINE void ev5_get_mmu_context(struct task_struct *p)
+__EXTERN_INLINE void
+ev4_get_mmu_context(struct task_struct *p)
 {
-	struct mm_struct * mm = p->mm;
+	/* As described, ASN's are broken.  But we can optimize for
+	   switching between threads -- if the mm is unchanged from
+	   current we needn't flush.  */
+	if (current->mm != p->mm)
+		tbiap();
+}
 
-	if (mm) {
-		unsigned long asn = asn_cache;
-		/* Check if our ASN is of an older version and thus invalid */
-		if ((mm->context ^ asn) & ~HARDWARE_ASN_MASK)
-			get_new_mmu_context(p, mm);
+__EXTERN_INLINE void
+ev5_get_mmu_context(struct task_struct *p)
+{
+	/* Check if our ASN is of an older version, or on a different CPU,
+	   and thus invalid.  */
+
+	long asn = cpu_last_asn(smp_processor_id());
+	struct mm_struct *mm = p->mm;
+	long mmc = mm->context;
+	
+	if ((p->tss.mm_context ^ asn) & ~HARDWARE_ASN_MASK) {
+		if ((mmc ^ asn) & ~HARDWARE_ASN_MASK)
+			mmc = __get_new_mmu_context(p, mm);
+		p->tss.mm_context = mmc;
+		p->tss.asn = mmc & HARDWARE_ASN_MASK;
 	}
 }
 
@@ -123,40 +142,40 @@ __EXTERN_INLINE void ev5_get_mmu_context(struct task_struct *p)
 # endif
 #endif
 
-extern inline void init_new_context(struct mm_struct *mm)
+extern inline void
+init_new_context(struct mm_struct *mm)
 {
 	mm->context = 0;
 }
 
-extern inline void destroy_context(struct mm_struct *mm)
+extern inline void
+destroy_context(struct mm_struct *mm)
 {
 	/* Nothing to do.  */
 }
 
+#ifdef __MMU_EXTERN_INLINE
+#undef __EXTERN_INLINE
+#undef __MMU_EXTERN_INLINE
+#endif
 
 /*
  * Force a context reload. This is needed when we change the page
  * table pointer or when we update the ASN of the current process.
  */
 
-#if defined(CONFIG_ALPHA_GENERIC)
-#define MASK_CONTEXT(tss) \
- ((struct thread_struct *)((unsigned long)(tss) & alpha_mv.mmu_context_mask))
-#elif defined(CONFIG_ALPHA_DP264)
-#define MASK_CONTEXT(tss) \
- ((struct thread_struct *)((unsigned long)(tss) & 0xfffffffffful))
-#else
-#define MASK_CONTEXT(tss)  (tss)
+/* Don't get into trouble with dueling __EXTERN_INLINEs.  */
+#ifndef __EXTERN_INLINE
+#include <asm/io.h>
 #endif
 
-__EXTERN_INLINE struct thread_struct *
+extern inline unsigned long
 __reload_tss(struct thread_struct *tss)
 {
-	register struct thread_struct *a0 __asm__("$16");
-	register struct thread_struct *v0 __asm__("$0");
-
-	a0 = MASK_CONTEXT(tss);
+	register unsigned long a0 __asm__("$16");
+	register unsigned long v0 __asm__("$0");
 
+	a0 = virt_to_phys(tss);
 	__asm__ __volatile__(
 		"call_pal %2 #__reload_tss"
 		: "=r"(v0), "=r"(a0)
@@ -166,27 +185,22 @@ __reload_tss(struct thread_struct *tss)
 	return v0;
 }
 
-__EXTERN_INLINE void
+extern inline void
 reload_context(struct task_struct *task)
 {
 	__reload_tss(&task->tss);
 }
 
 /*
- * After we have set current->mm to a new value, this activates the
- * context for the new mm so we see the new mappings.
+ * After setting current->mm to a new value, activate the context for the
+ * new mm so we see the new mappings.
  */
 
-__EXTERN_INLINE void
+extern inline void
 activate_context(struct task_struct *task)
 {
-	get_mmu_context(task);
+	get_new_mmu_context(task, task->mm);
 	reload_context(task);
 }
 
-#ifdef __MMU_EXTERN_INLINE
-#undef __EXTERN_INLINE
-#undef __MMU_EXTERN_INLINE
-#endif
-
 #endif /* __ALPHA_MMU_CONTEXT_H */
diff --git a/include/asm-alpha/page.h b/include/asm-alpha/page.h
index c2d27951e..816219ce9 100644
--- a/include/asm-alpha/page.h
+++ b/include/asm-alpha/page.h
@@ -105,6 +105,15 @@ typedef unsigned long pgprot_t;
 #define __pgprot(x)	(x)
 
 #endif /* STRICT_MM_TYPECHECKS */
+
+#define BUG()							\
+do {								\
+	printk("Kernel BUG at %s:%d!\n", __FILE__, __LINE__);	\
+	__asm__ __volatile__("call_pal 129 # bugchk");		\
+} while (1)
+
+#define PAGE_BUG(page) BUG()
+
 #endif /* !ASSEMBLY */
 
 /* to align the pointer to the (next) page boundary */
diff --git a/include/asm-alpha/processor.h b/include/asm-alpha/processor.h
index f6097cf7c..fa6c47b63 100644
--- a/include/asm-alpha/processor.h
+++ b/include/asm-alpha/processor.h
@@ -8,10 +8,10 @@
 #define __ASM_ALPHA_PROCESSOR_H
 
 /*
- * Default implementation of macro that returns current
- * instruction pointer ("program counter").
+ * Returns current instruction pointer ("program counter").
  */
-#define current_text_addr() ({ __label__ _l; _l: &&_l;})
+#define current_text_addr() \
+  ({ void *__pc; __asm__ ("br %0,.+4" : "=r"(__pc)); __pc; })
 
 /*
  * We have a 42-bit user address space: 4TB user VM...
@@ -61,6 +61,15 @@ struct thread_struct {
 	 */
 	unsigned long flags;
 
+	/* The full version of the ASN including serial number.
+
+	   Two threads running on two different processors must of necessity
+	   have different serial numbers.  Having this duplicated from
+	   mm->context allows them to be slightly out of sync preventing 
+	   the asn from incrementing each and every time the two threads
+	   are scheduled.  */
+	unsigned long mm_context;
+
 	/* Perform syscall argument validation (get/set_fs). */
 	mm_segment_t fs;
 
@@ -77,7 +86,7 @@ struct thread_struct {
 	0, 0, 0, \
 	0, 0, 0, \
 	0, 0, 0, \
-	0, \
+	0, 0, \
 	KERNEL_DS \
 }
 
diff --git a/include/asm-alpha/smp.h b/include/asm-alpha/smp.h
index d53142bb1..785194f81 100644
--- a/include/asm-alpha/smp.h
+++ b/include/asm-alpha/smp.h
@@ -9,6 +9,7 @@
 
 struct cpuinfo_alpha {
 	unsigned long loops_per_sec;
+	unsigned long last_asn;
 	unsigned long *pgd_cache;
 	unsigned long *pte_cache;
 	unsigned long pgtable_cache_sz;
diff --git a/include/asm-alpha/softirq.h b/include/asm-alpha/softirq.h
index cb89c5328..dad9c4905 100644
--- a/include/asm-alpha/softirq.h
+++ b/include/asm-alpha/softirq.h
@@ -5,18 +5,33 @@
 #include <asm/atomic.h>
 #include <asm/hardirq.h>
 
-/*
- * This works but is wrong - on SMP it should disable only on the
- * current CPU and shouldn't synchronize like the heavy global
- * disable does. Oh, well.
- *
- * See the x86 version for an example.
- */
-#define local_bh_enable()	start_bh_atomic()
-#define local_bh_disable()	end_bh_atomic()
-
 extern unsigned int local_bh_count[NR_CPUS];
 
+extern inline void cpu_bh_disable(int cpu)
+{
+	local_bh_count[cpu]++;
+	mb();
+}
+
+extern inline void cpu_bh_enable(int cpu)
+{
+	mb();
+	local_bh_count[cpu]--;
+}
+
+extern inline int cpu_bh_trylock(int cpu)
+{
+	return local_bh_count[cpu] ? 0 : (local_bh_count[cpu] = 1);
+}
+
+extern inline void cpu_bh_endlock(int cpu)
+{
+	local_bh_count[cpu] = 0;
+}
+
+#define local_bh_enable()	cpu_bh_enable(smp_processor_id())
+#define local_bh_disable()	cpu_bh_disable(smp_processor_id())
+
 #define get_active_bhs()	(bh_mask & bh_active)
 
 static inline void clear_active_bhs(unsigned long x)
@@ -43,8 +58,9 @@ extern inline void init_bh(int nr, void (*routine)(void))
 
 extern inline void remove_bh(int nr)
 {
-	bh_base[nr] = NULL;
 	bh_mask &= ~(1 << nr);
+	wmb();
+	bh_base[nr] = NULL;
 }
 
 extern inline void mark_bh(int nr)
@@ -78,44 +94,39 @@ static inline void end_bh_atomic(void)
 /* These are for the irq's testing the lock */
 static inline int softirq_trylock(int cpu)
 {
-	if (!test_and_set_bit(0,&global_bh_count)) {
-		if (atomic_read(&global_bh_lock) == 0) {
-			++local_bh_count[cpu];
-			return 1;
+	if (cpu_bh_trylock(cpu)) {
+		if (!test_and_set_bit(0, &global_bh_count)) {
+			if (atomic_read(&global_bh_lock) == 0)
+				return 1;
+			clear_bit(0, &global_bh_count);
 		}
-		clear_bit(0,&global_bh_count);
+		cpu_bh_endlock(cpu);
 	}
 	return 0;
 }
 
 static inline void softirq_endlock(int cpu)
 {
-	local_bh_count[cpu]--;
-	clear_bit(0,&global_bh_count);
+	cpu_bh_enable(cpu);
+	clear_bit(0, &global_bh_count);
 }
 
 #else
 
 extern inline void start_bh_atomic(void)
 {
-	local_bh_count[smp_processor_id()]++;
-	barrier();
+	local_bh_disable();
 }
 
 extern inline void end_bh_atomic(void)
 {
-	barrier();
-	local_bh_count[smp_processor_id()]--;
+	local_bh_enable();
 }
 
 /* These are for the irq's testing the lock */
-#define softirq_trylock(cpu) \
-  (local_bh_count[cpu] ? 0 : (local_bh_count[cpu] = 1))
-
-#define softirq_endlock(cpu) \
-  (local_bh_count[cpu] = 0)
-
-#define synchronize_bh()	do { } while (0)
+#define softirq_trylock(cpu)	cpu_bh_trylock(cpu)
+#define softirq_endlock(cpu)	cpu_bh_endlock(cpu)
+#define synchronize_bh()	barrier()
 
 #endif	/* SMP */
 
diff --git a/include/asm-alpha/spinlock.h b/include/asm-alpha/spinlock.h
index bbc8de52b..454a56582 100644
--- a/include/asm-alpha/spinlock.h
+++ b/include/asm-alpha/spinlock.h
@@ -8,29 +8,47 @@
  * and read-write locks.. We should actually do a
  * <linux/spinlock.h> with all of this. Oh, well.
  */
-#define spin_lock_irqsave(lock, flags)		do { local_irq_save(flags);       spin_lock(lock); } while (0)
-#define spin_lock_irq(lock)			do { local_irq_disable();         spin_lock(lock); } while (0)
-#define spin_lock_bh(lock)			do { local_bh_disable();          spin_lock(lock); } while (0)
-
-#define read_lock_irqsave(lock, flags)		do { local_irq_save(flags);       read_lock(lock); } while (0)
-#define read_lock_irq(lock)			do { local_irq_disable();         read_lock(lock); } while (0)
-#define read_lock_bh(lock)			do { local_bh_disable();          read_lock(lock); } while (0)
-
-#define write_lock_irqsave(lock, flags)		do { local_irq_save(flags);      write_lock(lock); } while (0)
-#define write_lock_irq(lock)			do { local_irq_disable();        write_lock(lock); } while (0)
-#define write_lock_bh(lock)			do { local_bh_disable();         write_lock(lock); } while (0)
-
-#define spin_unlock_irqrestore(lock, flags)	do { spin_unlock(lock);  local_irq_restore(flags); } while (0)
-#define spin_unlock_irq(lock)			do { spin_unlock(lock);  local_irq_enable();       } while (0)
-#define spin_unlock_bh(lock)			do { spin_unlock(lock);  local_bh_enable();        } while (0)
-
-#define read_unlock_irqrestore(lock, flags)	do { read_unlock(lock);  local_irq_restore(flags); } while (0)
-#define read_unlock_irq(lock)			do { read_unlock(lock);  local_irq_enable();       } while (0)
-#define read_unlock_bh(lock)			do { read_unlock(lock);  local_bh_enable();        } while (0)
-
-#define write_unlock_irqrestore(lock, flags)	do { write_unlock(lock); local_irq_restore(flags); } while (0)
-#define write_unlock_irq(lock)			do { write_unlock(lock); local_irq_enable();       } while (0)
-#define write_unlock_bh(lock)			do { write_unlock(lock); local_bh_enable();        } while (0)
+#define spin_lock_irqsave(lock, flags) \
+  do { local_irq_save(flags); spin_lock(lock); } while (0)
+#define spin_lock_irq(lock) \
+  do { local_irq_disable(); spin_lock(lock); } while (0)
+#define spin_lock_bh(lock) \
+  do { local_bh_disable(); spin_lock(lock); } while (0)
+
+#define read_lock_irqsave(lock, flags) \
+  do { local_irq_save(flags); read_lock(lock); } while (0)
+#define read_lock_irq(lock) \
+  do { local_irq_disable(); read_lock(lock); } while (0)
+#define read_lock_bh(lock) \
+  do { local_bh_disable(); read_lock(lock); } while (0)
+
+#define write_lock_irqsave(lock, flags) \
+  do { local_irq_save(flags); write_lock(lock); } while (0)
+#define write_lock_irq(lock) \
+  do { local_irq_disable(); write_lock(lock); } while (0)
+#define write_lock_bh(lock) \
+  do { local_bh_disable(); write_lock(lock); } while (0)
+
+#define spin_unlock_irqrestore(lock, flags) \
+  do { spin_unlock(lock); local_irq_restore(flags); } while (0)
+#define spin_unlock_irq(lock) \
+  do { spin_unlock(lock); local_irq_enable(); } while (0)
+#define spin_unlock_bh(lock) \
+  do { spin_unlock(lock); local_bh_enable(); } while (0)
+
+#define read_unlock_irqrestore(lock, flags) \
+  do { read_unlock(lock); local_irq_restore(flags); } while (0)
+#define read_unlock_irq(lock) \
+  do { read_unlock(lock); local_irq_enable(); } while (0)
+#define read_unlock_bh(lock) \
+  do { read_unlock(lock); local_bh_enable(); } while (0)
+
+#define write_unlock_irqrestore(lock, flags) \
+  do { write_unlock(lock); local_irq_restore(flags); } while (0)
+#define write_unlock_irq(lock) \
+  do { write_unlock(lock); local_irq_enable(); } while (0)
+#define write_unlock_bh(lock) \
+  do { write_unlock(lock); local_bh_enable(); } while (0)
 
 #ifndef __SMP__
 
@@ -49,7 +67,7 @@
 
 #define spin_lock_init(lock)			((void) 0)
 #define spin_lock(lock)				((void) 0)
-#define spin_trylock(lock)			((void) 0)
+#define spin_trylock(lock)			(1)
 #define spin_unlock_wait(lock)			((void) 0)
 #define spin_unlock(lock)			((void) 0)
 
@@ -94,19 +112,20 @@
  */
 
 typedef struct {
-	volatile unsigned int lock;
+	volatile unsigned int lock /*__attribute__((aligned(32))) */;
 #if DEBUG_SPINLOCK
-	char debug_state, target_ipl, saved_ipl, on_cpu;
+	int on_cpu;
+	int line_no;
 	void *previous;
 	struct task_struct * task;
+	const char *base_file;
 #endif
 } spinlock_t;
 
 #if DEBUG_SPINLOCK
-#define SPIN_LOCK_UNLOCKED (spinlock_t) {0, 1, 0, 0, 0, 0}
+#define SPIN_LOCK_UNLOCKED (spinlock_t) {0, -1, 0, 0, 0, 0}
 #define spin_lock_init(x)						\
-	((x)->lock = 0, (x)->target_ipl = 0, (x)->debug_state = 1,	\
-	 (x)->previous = 0, (x)->task = 0)
+	((x)->lock = 0, (x)->on_cpu = -1, (x)->previous = 0, (x)->task = 0)
 #else
 #define SPIN_LOCK_UNLOCKED	(spinlock_t) { 0 }
 #define spin_lock_init(x)	((x)->lock = 0)
@@ -120,8 +139,11 @@ typedef struct { unsigned long a[100]; } __dummy_lock_t;
 
 #if DEBUG_SPINLOCK
 extern void spin_unlock(spinlock_t * lock);
-extern void spin_lock(spinlock_t * lock);
-extern int spin_trylock(spinlock_t * lock);
+extern void debug_spin_lock(spinlock_t * lock, const char *, int);
+extern int debug_spin_trylock(spinlock_t * lock, const char *, int);
+
+#define spin_lock(LOCK) debug_spin_lock(LOCK, __BASE_FILE__, __LINE__)
+#define spin_trylock(LOCK) debug_spin_trylock(LOCK, __BASE_FILE__, __LINE__)
 
 #define spin_lock_own(LOCK, LOCATION)					\
 do {									\
@@ -167,7 +189,9 @@ static inline void spin_lock(spinlock_t * lock)
 
 /***********************************************************/
 
-typedef struct { volatile int write_lock:1, read_counter:31; } rwlock_t;
+typedef struct {
+	volatile int write_lock:1, read_counter:31;
+} /*__attribute__((aligned(32)))*/ rwlock_t;
 
 #define RW_LOCK_UNLOCKED (rwlock_t) { 0, 0 }
 
diff --git a/include/asm-alpha/system.h b/include/asm-alpha/system.h
index 2be0ced69..6939d37ab 100644
--- a/include/asm-alpha/system.h
+++ b/include/asm-alpha/system.h
@@ -86,16 +86,6 @@ struct el_common_EV5_uncorrectable_mcheck {
         unsigned long   ld_lock;          /* Contents of EV5 LD_LOCK register*/
 };
 
-
-extern void wrent(void *, unsigned long);
-extern void wrkgp(unsigned long);
-extern void wrusp(unsigned long);
-extern unsigned long rdusp(void);
-extern unsigned long rdmces (void);
-extern void wrmces (unsigned long);
-extern unsigned long whami(void);
-extern void wripir(unsigned long);
-
 extern void halt(void) __attribute__((noreturn));
 
 #define switch_to(prev,next,last)			\
@@ -159,73 +149,86 @@ enum amask_enum {
    __asm__ ("amask %1,%0" : "=r"(__amask) : "rI"(__input));	\
    __amask; })
 
-static inline unsigned long 
-wrperfmon(unsigned long perf_fun, unsigned long arg)
-{
-          register unsigned long __r0 __asm__("$0");
-	  register unsigned long __r16 __asm__("$16");
-	  register unsigned long __r17 __asm__("$17");
-	  __r16 = perf_fun;
-	  __r17 = arg;
-	  __asm__ __volatile__(
-		  "call_pal %1"
-		  : "=r"(__r0)
-		  : "i"(PAL_wrperfmon), "r"(__r16), "r"(__r17)
-		  : "$1", "$22", "$23", "$24", "$25", "$26");
-	  return __r0;
+#define __CALL_PAL_R0(NAME, TYPE)				\
+static inline TYPE NAME(void)					\
+{								\
+	register TYPE __r0 __asm__("$0");			\
+	__asm__ __volatile__(					\
+		"call_pal %1 # " #NAME				\
+		:"=r" (__r0)					\
+		:"i" (PAL_ ## NAME)				\
+		:"$1", "$16", "$22", "$23", "$24", "$25");	\
+	return __r0;						\
 }
 
+#define __CALL_PAL_W1(NAME, TYPE0)				\
+static inline void NAME(TYPE0 arg0)				\
+{								\
+	register TYPE0 __r16 __asm__("$16") = arg0;		\
+	__asm__ __volatile__(					\
+		"call_pal %1 # "#NAME				\
+		: "=r"(__r16)					\
+		: "i"(PAL_ ## NAME), "0"(__r16)			\
+		: "$1", "$22", "$23", "$24", "$25");		\
+}
 
-#define call_pal1(palno,arg)						\
-({									\
-	register unsigned long __r0 __asm__("$0");			\
-	register unsigned long __r16 __asm__("$16"); __r16 = arg;	\
-	__asm__ __volatile__(						\
-		"call_pal %3 #call_pal1"				\
-		:"=r" (__r0),"=r" (__r16)				\
-		:"1" (__r16),"i" (palno)				\
-		:"$1", "$22", "$23", "$24", "$25", "memory");		\
-	__r0;								\
-})
-
-#define getipl()							\
-({									\
-	register unsigned long r0 __asm__("$0");			\
-	__asm__ __volatile__(						\
-		"call_pal %1 #getipl"					\
-		:"=r" (r0)						\
-		:"i" (PAL_rdps)						\
-		:"$1", "$16", "$22", "$23", "$24", "$25", "memory");	\
-	r0;								\
-})
+#define __CALL_PAL_W2(NAME, TYPE0, TYPE1)			\
+static inline void NAME(TYPE0 arg0, TYPE1 arg1)			\
+{								\
+	register TYPE0 __r16 __asm__("$16") = arg0;		\
+	register TYPE1 __r17 __asm__("$17") = arg1;		\
+	__asm__ __volatile__(					\
+		"call_pal %2 # "#NAME				\
+		: "=r"(__r16), "=r"(__r17)			\
+		: "i"(PAL_ ## NAME), "0"(__r16), "1"(__r17)	\
+		: "$1", "$22", "$23", "$24", "$25");		\
+}
 
-#define setipl(ipl)							\
-({									\
-	register unsigned long __r16 __asm__("$16"); __r16 = (ipl);	\
-	__asm__ __volatile__(						\
-		"call_pal %2 #setipl"					\
-		:"=r" (__r16)						\
-		:"0" (__r16),"i" (PAL_swpipl)				\
-		:"$0", "$1", "$22", "$23", "$24", "$25", "memory");	\
-})
+#define __CALL_PAL_RW1(NAME, RTYPE, TYPE0)			\
+static inline RTYPE NAME(TYPE0 arg0)				\
+{								\
+	register RTYPE __r0 __asm__("$0");			\
+	register TYPE0 __r16 __asm__("$16") = arg0;		\
+	__asm__ __volatile__(					\
+		"call_pal %2 # "#NAME				\
+		: "=r"(__r16), "=r"(__r0)			\
+		: "i"(PAL_ ## NAME), "0"(__r16)			\
+		: "$1", "$22", "$23", "$24", "$25");		\
+	return __r0;						\
+}
 
-#define swpipl(ipl)						\
-({								\
-	register unsigned long __r0 __asm__("$0");		\
-	register unsigned long __r16 __asm__("$16") = (ipl);	\
+#define __CALL_PAL_RW2(NAME, RTYPE, TYPE0, TYPE1)		\
+static inline RTYPE NAME(TYPE0 arg0, TYPE1 arg1)		\
+{								\
+	register RTYPE __r0 __asm__("$0");			\
+	register TYPE0 __r16 __asm__("$16") = arg0;		\
+	register TYPE1 __r17 __asm__("$17") = arg1;		\
 	__asm__ __volatile__(					\
-		"call_pal %3 #swpipl"				\
-		:"=r" (__r0),"=r" (__r16)			\
-		:"1" (__r16),"i" (PAL_swpipl)			\
-		:"$1", "$22", "$23", "$24", "$25", "memory");	\
-	__r0;							\
-})
+		"call_pal %3 # "#NAME				\
+		: "=r"(__r16), "=r"(__r17), "=r"(__r0)		\
+		: "i"(PAL_ ## NAME), "0"(__r16), "1"(__r17)	\
+		: "$1", "$22", "$23", "$24", "$25");		\
+	return __r0;						\
+}
 
-#define __cli()			setipl(7)
-#define __sti()			setipl(0)
-#define __save_flags(flags)	((flags) = getipl())
+__CALL_PAL_R0(rdmces, unsigned long);
+__CALL_PAL_R0(rdps, unsigned long);
+__CALL_PAL_R0(rdusp, unsigned long);
+__CALL_PAL_RW1(swpipl, unsigned long, unsigned long);
+__CALL_PAL_R0(whami, unsigned long);
+__CALL_PAL_W2(wrent, void*, unsigned long);
+__CALL_PAL_W1(wripir, unsigned long);
+__CALL_PAL_W1(wrkgp, unsigned long);
+__CALL_PAL_W1(wrmces, unsigned long);
+__CALL_PAL_RW2(wrperfmon, unsigned long, unsigned long, unsigned long);
+__CALL_PAL_W1(wrusp, unsigned long);
+__CALL_PAL_W1(wrvptptr, unsigned long);
+
+#define __cli()			((void) swpipl(7))
+#define __sti()			((void) swpipl(0))
+#define __save_flags(flags)	((flags) = rdps())
 #define __save_and_cli(flags)	((flags) = swpipl(7))
-#define __restore_flags(flags)	setipl(flags)
+#define __restore_flags(flags)	((void) swpipl(flags))
 
 #define local_irq_save(flags)		__save_and_cli(flags)
 #define local_irq_restore(flags)	__restore_flags(flags)
@@ -294,6 +297,7 @@ extern __inline__ unsigned long xchg_u32(volatile int *m, unsigned long val)
 	"	bis $31,%3,%1\n"
 	"	stl_c %1,%2\n"
 	"	beq %1,2f\n"
+	"	mb\n"
 	".section .text2,\"ax\"\n"
 	"2:	br 1b\n"
 	".previous"
@@ -312,6 +316,7 @@ extern __inline__ unsigned long xchg_u64(volatile long * m, unsigned long val)
 	"	bis $31,%3,%1\n"
 	"	stq_c %1,%2\n"
 	"	beq %1,2f\n"
+	"	mb\n"
 	".section .text2,\"ax\"\n"
 	"2:	br 1b\n"
 	".previous"
diff --git a/include/asm-i386/spinlock.h b/include/asm-i386/spinlock.h
index b447a402f..d3e9fc744 100644
--- a/include/asm-i386/spinlock.h
+++ b/include/asm-i386/spinlock.h
@@ -50,7 +50,7 @@
 #endif
 
 #define spin_lock_init(lock)	do { } while(0)
-#define spin_lock(lock)		do { } while(0)
+#define spin_lock(lock)		(void)(lock) /* Not "unused variable". */
 #define spin_trylock(lock)	(1)
 #define spin_unlock_wait(lock)	do { } while(0)
 #define spin_unlock(lock)	do { } while(0)
@@ -109,9 +109,9 @@ typedef struct {
   #define RW_LOCK_UNLOCKED (rwlock_t) { 0 }
 #endif
 
-#define read_lock(lock)		do { } while(0)
+#define read_lock(lock)		(void)(lock) /* Not "unused variable". */
 #define read_unlock(lock)	do { } while(0)
-#define write_lock(lock)	do { } while(0)
+#define write_lock(lock)	(void)(lock) /* Not "unused variable". */
 #define write_unlock(lock)	do { } while(0)
 
 #else	/* __SMP__ */
diff --git a/include/asm-mips/spinlock.h b/include/asm-mips/spinlock.h
index 6a7b067b2..63811c615 100644
--- a/include/asm-mips/spinlock.h
+++ b/include/asm-mips/spinlock.h
@@ -1,4 +1,4 @@
-/* $Id: spinlock.h,v 1.4 1998/08/25 16:45:46 tsbogend Exp $
+/* $Id: spinlock.h,v 1.5 1999/06/17 13:30:39 ralf Exp $
  */
 #ifndef __ASM_MIPS_SPINLOCK_H
 #define __ASM_MIPS_SPINLOCK_H
@@ -46,10 +46,10 @@
 #endif
 
 #define spin_lock_init(lock)	do { } while(0)
-#define spin_lock(lock)		do { } while(0)
+#define spin_lock(lock)		(void)(lock) /* Not "unused variable". */
 #define spin_trylock(lock)	(1)
 #define spin_unlock_wait(lock)	do { } while(0)
-#define spin_unlock(lock)	do { } while(0)
+#define spin_unlock(lock)	(void)(lock) /* Not "unused variable". */
 
 /*
  * Read-write spinlocks, allowing multiple readers
@@ -64,9 +64,9 @@
 typedef struct { } rwlock_t;
 #define RW_LOCK_UNLOCKED (rwlock_t) { }
 
-#define read_lock(lock)		do { } while(0)
+#define read_lock(lock)		(void)(lock) /* Not "unused variable". */
 #define read_unlock(lock)	do { } while(0)
-#define write_lock(lock)	do { } while(0)
+#define write_lock(lock)	(void)(lock) /* Not "unused variable". */
 #define write_unlock(lock)	do { } while(0)
 
 #else
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 792df9495..8afa183f9 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -738,7 +738,6 @@ extern int fs_may_mount(kdev_t);
 
 extern struct file *inuse_filps;
 
-extern void set_writetime(struct buffer_head *, int);
 extern int try_to_free_buffers(struct page *);
 extern void refile_buffer(struct buffer_head * buf);
 
diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h
index c5a8af7c7..3b7272caa 100644
--- a/include/linux/pagemap.h
+++ b/include/linux/pagemap.h
@@ -76,6 +76,7 @@ extern void lock_page(struct page *page);
 
 extern void __add_page_to_hash_queue(struct page * page, struct page **p);
 
+extern void add_to_page_cache(struct page * page, struct inode * inode, unsigned long offset);
 extern int add_to_page_cache_unique(struct page * page, struct inode * inode, unsigned long offset, struct page **hash);
 
 static inline void add_page_to_hash_queue(struct page * page, struct inode * inode, unsigned long offset)
diff --git a/include/linux/swap.h b/include/linux/swap.h
index c06ddba63..e95a3881a 100644
--- a/include/linux/swap.h
+++ b/include/linux/swap.h
@@ -52,7 +52,6 @@ struct swap_info_struct {
 	kdev_t swap_device;
 	struct dentry * swap_file;
 	unsigned short * swap_map;
-	unsigned char * swap_lockmap;
 	unsigned int lowest_bit;
 	unsigned int highest_bit;
 	unsigned int cluster_next;
@@ -85,7 +84,7 @@ extern void swap_setup (void);
 extern int try_to_free_pages(unsigned int gfp_mask);
 
 /* linux/mm/page_io.c */
-extern void rw_swap_page(int, unsigned long, char *, int);
+extern void rw_swap_page(int, struct page *, int);
 extern void rw_swap_page_nocache(int, unsigned long, char *);
 extern void rw_swap_page_nolock(int, unsigned long, char *, int);
 extern void swap_after_unlock_page (unsigned long entry);
@@ -97,7 +96,7 @@ extern void swap_in(struct task_struct *, struct vm_area_struct *,
 
 /* linux/mm/swap_state.c */
 extern void show_swap_cache_info(void);
-extern int add_to_swap_cache(struct page *, unsigned long);
+extern void add_to_swap_cache(struct page *, unsigned long);
 extern int swap_duplicate(unsigned long);
 extern int swap_check_entry(unsigned long);
 struct page * lookup_swap_cache(unsigned long);
@@ -146,13 +145,6 @@ extern unsigned long swap_cache_find_total;
 extern unsigned long swap_cache_find_success;
 #endif
 
-extern inline unsigned long in_swap_cache(struct page *page)
-{
-	if (PageSwapCache(page))
-		return page->offset;
-	return 0;
-}
-
 /*
  * Work out if there are any other processes sharing this page, ignoring
  * any page reference coming from the swap cache, or from outstanding
-- 
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