Merge bk://are.twiddle.net:8080/linux-alpha-2.5

into home.transmeta.com:/home/torvalds/v2.5/linux

arch/alpha/kernel/smp.c

@@ -62,6 +62,7 @@ static struct {
 
 enum ipi_message_type {
 	IPI_RESCHEDULE,
+	IPI_MIGRATION,
 	IPI_CALL_FUNC,
 	IPI_CPU_STOP,
 };
@@ -69,7 +70,7 @@ enum ipi_message_type {
 spinlock_t kernel_flag __cacheline_aligned_in_smp = SPIN_LOCK_UNLOCKED;
 
 /* Set to a secondary's cpuid when it comes online.  */
-static unsigned long smp_secondary_alive;
+static int smp_secondary_alive __initdata = 0;
 
 /* Which cpus ids came online.  */
 unsigned long cpu_present_mask;
@@ -82,6 +83,7 @@ int smp_num_probed;		/* Internal processor count */
 int smp_num_cpus = 1;		/* Number that came online.  */
 int smp_threads_ready;		/* True once the per process idle is forked. */
 cycles_t cacheflush_time;
+unsigned long cache_decay_ticks;
 
 int __cpu_number_map[NR_CPUS];
 int __cpu_logical_map[NR_CPUS];
@@ -156,13 +158,6 @@ smp_callin(void)
 {
 	int cpuid = hard_smp_processor_id();
 
-	if (current != init_tasks[cpu_number_map(cpuid)]) {
-		printk("BUG: smp_calling: cpu %d current %p init_tasks[cpu_number_map(cpuid)] %p\n",
-		       cpuid, current, init_tasks[cpu_number_map(cpuid)]);
-	}
-
-	DBGS(("CALLIN %d state 0x%lx\n", cpuid, current->state));
-
 	/* Turn on machine checks.  */
 	wrmces(7);
 
@@ -175,22 +170,21 @@ smp_callin(void)
 	/* Get our local ticker going. */
 	smp_setup_percpu_timer(cpuid);
 
+	/* All kernel threads share the same mm context.  */
+	atomic_inc(&init_mm.mm_count);
+	current->active_mm = &init_mm;
+
 	/* Must have completely accurate bogos.  */
 	__sti();
 
-	/*
-	 * Wait boot CPU to stop with irq enabled before
-	 * running calibrate_delay().
-	 */
+	/* Wait boot CPU to stop with irq enabled before running
+	   calibrate_delay. */
 	wait_boot_cpu_to_stop(cpuid);
 	mb();
 	calibrate_delay();
 
 	smp_store_cpu_info(cpuid);
-	/*
-	 * Allow master to continue only after we written
-	 * the loops_per_jiffy.
-	 */
+	/* Allow master to continue only after we written loops_per_jiffy.  */
 	wmb();
 	smp_secondary_alive = 1;
 
@@ -198,15 +192,9 @@ smp_callin(void)
 	while (!smp_threads_ready)
 		barrier();
 
-	DBGS(("smp_callin: commencing CPU %d current %p\n",
-	      cpuid, current));
-
-	/* Setup the scheduler for this processor.  */
-	init_idle();
+	DBGS(("smp_callin: commencing CPU %d current %p active_mm %p\n",
+	      cpuid, current, current->active_mm));
 
-	/* ??? This should be in init_idle.  */
-	atomic_inc(&init_mm.mm_count);
-	current->active_mm = &init_mm;
 	/* Do nothing.  */
 	cpu_idle();
 }
@@ -222,8 +210,9 @@ static void __init
 smp_tune_scheduling (int cpuid)
 {
 	struct percpu_struct *cpu;
-	unsigned long on_chip_cache;
-	unsigned long freq;
+	unsigned long on_chip_cache;	/* kB */
+	unsigned long freq;		/* Hz */
+	unsigned long bandwidth = 350;	/* MB/s */
 
 	cpu = (struct percpu_struct*)((char*)hwrpb + hwrpb->processor_offset
 				      + cpuid * hwrpb->processor_size);
@@ -244,43 +233,54 @@ smp_tune_scheduling (int cpuid)
 
 	case EV6_CPU:
 	case EV67_CPU:
-		on_chip_cache = 64 + 64;
-		break;
-
 	default:
-		on_chip_cache = 8 + 8;
+		on_chip_cache = 64 + 64;
 		break;
 	}
 
 	freq = hwrpb->cycle_freq ? : est_cycle_freq;
 
-#if 0
-	/* Magic estimation stolen from x86 port.  */
-	cacheflush_time = freq / 1024L * on_chip_cache / 5000L;
+	cacheflush_time = (freq / 1000000) * (on_chip_cache << 10) / bandwidth;
+	cache_decay_ticks = cacheflush_time / (freq / 1000) * HZ / 1000;
 
-        printk("Using heuristic of %d cycles.\n",
-               cacheflush_time);
-#else
-	/* Magic value to force potential preemption of other CPUs.  */
-	cacheflush_time = INT_MAX;
+	printk("per-CPU timeslice cutoff: %ld.%02ld usecs.\n",
+	       cacheflush_time/(freq/1000000),
+	       (cacheflush_time*100/(freq/1000000)) % 100);
+	printk("task migration cache decay timeout: %ld msecs.\n",
+	       (cache_decay_ticks + 1) * 1000 / HZ);
+}
 
-        printk("Using heuristic of %d cycles.\n",
-               cacheflush_time);
-#endif
+/* Wait until hwrpb->txrdy is clear for cpu.  Return -1 on timeout.  */
+static int __init
+wait_for_txrdy (unsigned long cpumask)
+{
+	unsigned long timeout;
+
+	if (!(hwrpb->txrdy & cpumask))
+		return 0;
+
+	timeout = jiffies + 10*HZ;
+	while (time_before(jiffies, timeout)) {
+		if (!(hwrpb->txrdy & cpumask))
+			return 0;
+		udelay(10);
+		barrier();
+	}
+
+	return -1;
 }
 
 /*
  * Send a message to a secondary's console.  "START" is one such
  * interesting message.  ;-)
  */
-static void
+static void __init
 send_secondary_console_msg(char *str, int cpuid)
 {
 	struct percpu_struct *cpu;
 	register char *cp1, *cp2;
 	unsigned long cpumask;
 	size_t len;
-	long timeout;
 
 	cpu = (struct percpu_struct *)
 		((char*)hwrpb
@@ -288,9 +288,8 @@ send_secondary_console_msg(char *str, int cpuid)
 		 + cpuid * hwrpb->processor_size);
 
 	cpumask = (1UL << cpuid);
-	if (hwrpb->txrdy & cpumask)
-		goto delay1;
-	ready1:
+	if (wait_for_txrdy(cpumask))
+		goto timeout;
 
 	cp2 = str;
 	len = strlen(cp2);
@@ -302,34 +301,12 @@ send_secondary_console_msg(char *str, int cpuid)
 	wmb();
 	set_bit(cpuid, &hwrpb->rxrdy);
 
-	if (hwrpb->txrdy & cpumask)
-		goto delay2;
-	ready2:
+	if (wait_for_txrdy(cpumask))
+		goto timeout;
 	return;
 
-delay1:
-	/* Wait 10 seconds.  Note that jiffies aren't ticking yet.  */
-	for (timeout = 1000000; timeout > 0; --timeout) {
-		if (!(hwrpb->txrdy & cpumask))
-			goto ready1;
-		udelay(10);
-		barrier();
-	}
-	goto timeout;
-
-delay2:
-	/* Wait 10 seconds.  */
-	for (timeout = 1000000; timeout > 0; --timeout) {
-		if (!(hwrpb->txrdy & cpumask))
-			goto ready2;
-		udelay(10);
-		barrier();
-	}
-	goto timeout;
-
-timeout:
+ timeout:
 	printk("Processor %x not ready\n", cpuid);
-	return;
 }
 
 /*
@@ -392,7 +369,7 @@ static int __init
 secondary_cpu_start(int cpuid, struct task_struct *idle)
 {
 	struct percpu_struct *cpu;
-	struct pcb_struct *hwpcb;
+	struct pcb_struct *hwpcb, *ipcb;
 	long timeout;
 	  
 	cpu = (struct percpu_struct *)
@@ -400,18 +377,19 @@ secondary_cpu_start(int cpuid, struct task_struct *idle)
 		 + hwrpb->processor_offset
 		 + cpuid * hwrpb->processor_size);
 	hwpcb = (struct pcb_struct *) cpu->hwpcb;
+	ipcb = &idle->thread_info->pcb;
 
 	/* Initialize the CPU's HWPCB to something just good enough for
 	   us to get started.  Immediately after starting, we'll swpctx
-	   to the target idle task's ptb.  Reuse the stack in the mean
+	   to the target idle task's pcb.  Reuse the stack in the mean
 	   time.  Precalculate the target PCBB.  */
-	hwpcb->ksp = (unsigned long) idle + sizeof(union task_union) - 16;
+	hwpcb->ksp = (unsigned long)ipcb + sizeof(union thread_union) - 16;
 	hwpcb->usp = 0;
-	hwpcb->ptbr = idle->thread.ptbr;
+	hwpcb->ptbr = ipcb->ptbr;
 	hwpcb->pcc = 0;
 	hwpcb->asn = 0;
-	hwpcb->unique = virt_to_phys(&idle->thread);
-	hwpcb->flags = idle->thread.pal_flags;
+	hwpcb->unique = virt_to_phys(ipcb);
+	hwpcb->flags = ipcb->flags;
 	hwpcb->res1 = hwpcb->res2 = 0;
 
 #if 0
@@ -419,7 +397,7 @@ secondary_cpu_start(int cpuid, struct task_struct *idle)
 	      hwpcb->ksp, hwpcb->ptbr, hwrpb->vptb, hwpcb->unique));
 #endif
 	DBGS(("Starting secondary cpu %d: state 0x%lx pal_flags 0x%lx\n",
-	      cpuid, idle->state, idle->thread.pal_flags));
+	      cpuid, idle->state, ipcb->flags));
 
 	/* Setup HWRPB fields that SRM uses to activate secondary CPU */
 	hwrpb->CPU_restart = __smp_callin;
@@ -439,9 +417,9 @@ secondary_cpu_start(int cpuid, struct task_struct *idle)
 
 	send_secondary_console_msg("START\r\n", cpuid);
 
-	/* Wait 10 seconds for an ACK from the console.  Note that jiffies 
-	   aren't ticking yet.  */
-	for (timeout = 1000000; timeout > 0; timeout--) {
+	/* Wait 10 seconds for an ACK from the console.  */
+	timeout = jiffies + 10*HZ;
+	while (time_before(jiffies, timeout)) {
 		if (cpu->flags & 1)
 			goto started;
 		udelay(10);
@@ -450,18 +428,17 @@ secondary_cpu_start(int cpuid, struct task_struct *idle)
 	printk(KERN_ERR "SMP: Processor %d failed to start.\n", cpuid);
 	return -1;
 
-started:
+ started:
 	DBGS(("secondary_cpu_start: SUCCESS for CPU %d!!!\n", cpuid));
 	return 0;
 }
 
-static int __init fork_by_hand(void)
+static int __init
+fork_by_hand(void)
 {
+	/* Don't care about the contents of regs since we'll never
+	   reschedule the forked task. */
 	struct pt_regs regs;
-	/*
-	 * don't care about the regs settings since
-	 * we'll never reschedule the forked task.
-	 */
 	return do_fork(CLONE_VM|CLONE_PID, 0, &regs, 0);
 }
 
@@ -474,67 +451,57 @@ smp_boot_one_cpu(int cpuid, int cpunum)
 	struct task_struct *idle;
 	long timeout;
 
-	/* Cook up an idler for this guy.  Note that the address we give
-	   to kernel_thread is irrelevant -- it's going to start where
-	   HWRPB.CPU_restart says to start.  But this gets all the other
-	   task-y sort of data structures set up like we wish.  */
-	/*
-	 * We can't use kernel_thread since we must avoid to
-	 * reschedule the child.
-	 */
+	/* Cook up an idler for this guy.  Note that the address we
+	   give to kernel_thread is irrelevant -- it's going to start
+	   where HWRPB.CPU_restart says to start.  But this gets all
+	   the other task-y sort of data structures set up like we
+	   wish.  We can't use kernel_thread since we must avoid
+	   rescheduling the child.  */
 	if (fork_by_hand() < 0)
 		panic("failed fork for CPU %d", cpuid);
 
 	idle = init_task.prev_task;
 	if (!idle)
 		panic("No idle process for CPU %d", cpuid);
-	if (idle == &init_task)
-		panic("idle process is init_task for CPU %d", cpuid);
 
-	idle->processor = cpuid;
-	idle->cpus_runnable = 1 << cpuid; /* we schedule the first task manually */
+	init_idle(idle, cpuid);
+	unhash_process(idle);
+
 	__cpu_logical_map[cpunum] = cpuid;
 	__cpu_number_map[cpuid] = cpunum;
- 
-	del_from_runqueue(idle);
-	unhash_process(idle);
-	init_tasks[cpunum] = idle;
 
 	DBGS(("smp_boot_one_cpu: CPU %d state 0x%lx flags 0x%lx\n",
 	      cpuid, idle->state, idle->flags));
 
-	/* The secondary will change this once it is happy.  Note that
-	   secondary_cpu_start contains the necessary memory barrier.  */
+	/* Signal the secondary to wait a moment.  */
 	smp_secondary_alive = -1;
 
 	/* Whirrr, whirrr, whirrrrrrrrr... */
 	if (secondary_cpu_start(cpuid, idle))
 		return -1;
 
+	/* Notify the secondary CPU it can run calibrate_delay.  */
 	mb();
-	/* Notify the secondary CPU it can run calibrate_delay() */
 	smp_secondary_alive = 0;
 
-	/* We've been acked by the console; wait one second for the task
-	   to start up for real.  Note that jiffies aren't ticking yet.  */
-	for (timeout = 0; timeout < 1000000; timeout++) {
+	/* We've been acked by the console; wait one second for
+	   the task to start up for real.  */
+	timeout = jiffies + 1*HZ;
+	while (time_before(jiffies, timeout)) {
 		if (smp_secondary_alive == 1)
 			goto alive;
 		udelay(10);
 		barrier();
 	}
 
-	/* we must invalidate our stuff as we failed to boot the CPU */
+	/* We must invalidate our stuff as we failed to boot the CPU.  */
 	__cpu_logical_map[cpunum] = -1;
 	__cpu_number_map[cpuid] = -1;
 
-	/* the idle task is local to us so free it as we don't use it */
-	free_task_struct(idle);
-
 	printk(KERN_ERR "SMP: Processor %d is stuck.\n", cpuid);
 	return -1;
 
-alive:
+ alive:
 	/* Another "Red Snapper". */
 	return 0;
 }
@@ -605,20 +572,15 @@ smp_boot_cpus(void)
 
 	__cpu_number_map[boot_cpuid] = 0;
 	__cpu_logical_map[0] = boot_cpuid;
-	current->processor = boot_cpuid;
+	current_thread_info()->cpu = boot_cpuid;
 
 	smp_store_cpu_info(boot_cpuid);
 	smp_tune_scheduling(boot_cpuid);
 	smp_setup_percpu_timer(boot_cpuid);
 
-	init_idle();
-
-	/* ??? This should be in init_idle.  */
-	atomic_inc(&init_mm.mm_count);
-	current->active_mm = &init_mm;
-
 	/* Nothing to do on a UP box, or when told not to.  */
 	if (smp_num_probed == 1 || max_cpus == 0) {
+		cpu_present_mask = 1UL << boot_cpuid;
 		printk(KERN_INFO "SMP mode deactivated.\n");
 		return;
 	}
@@ -707,26 +669,35 @@ setup_profiling_timer(unsigned int multiplier)
 static void
 send_ipi_message(unsigned long to_whom, enum ipi_message_type operation)
 {
-	long i, j;
-
-	/* Reduce the number of memory barriers by doing two loops,
-	   one to set the bits, one to invoke the interrupts.  */
-
-	mb();	/* Order out-of-band data and bit setting. */
-
-	for (i = 0, j = 1; i < NR_CPUS; ++i, j <<= 1) {
-		if (to_whom & j)
-			set_bit(operation, &ipi_data[i].bits);
-	}
-
-	mb();	/* Order bit setting and interrupt. */
+	unsigned long i, set, n;
+
+	set = to_whom & -to_whom;
+	if (to_whom == set) {
+		n = __ffs(set);
+		mb();
+		set_bit(operation, &ipi_data[n].bits);
+		mb();
+		wripir(n);
+	} else {
+		mb();
+		for (i = to_whom; i ; i &= ~set) {
+			set = i & -i;
+			n = __ffs(set);
+			set_bit(operation, &ipi_data[n].bits);
+		}
 
-	for (i = 0, j = 1; i < NR_CPUS; ++i, j <<= 1) {
-		if (to_whom & j)
-			wripir(i);
+		mb();
+		for (i = to_whom; i ; i &= ~set) {
+			set = i & -i;
+			n = __ffs(set);
+			wripir(n);
+		}
 	}
 }
 
+/* Data for IPI_MIGRATION.  */
+static task_t *migration_task;
+
 /* Structure and data for smp_call_function.  This is designed to 
    minimize static memory requirements.  Plus it looks cleaner.  */
 
@@ -743,13 +714,13 @@ static struct smp_call_struct *smp_call_function_data;
 /* Atomicly drop data into a shared pointer.  The pointer is free if
    it is initially locked.  If retry, spin until free.  */
 
-static inline int
+static int
 pointer_lock (void *lock, void *data, int retry)
 {
 	void *old, *tmp;
 
 	mb();
-again:
+ again:
 	/* Compare and swap with zero.  */
 	asm volatile (
 	"1:	ldq_l	%0,%1\n"
@@ -792,13 +763,25 @@ handle_ipi(struct pt_regs *regs)
 
 		which = ops & -ops;
 		ops &= ~which;
-		which = ffz(~which);
+		which = __ffs(which);
 
-		if (which == IPI_RESCHEDULE) {
+		switch (which) {
+		case IPI_RESCHEDULE:
 			/* Reschedule callback.  Everything to be done
 			   is done by the interrupt return path.  */
-		}
-		else if (which == IPI_CALL_FUNC) {
+			break;
+
+		case IPI_MIGRATION:
+		    {
+			task_t *t = migration_task;
+			mb();
+			migration_task = 0;
+			sched_task_migrated(t);
+			break;
+		    }
+
+		case IPI_CALL_FUNC:
+		    {
 			struct smp_call_struct *data;
 			void (*func)(void *info);
 			void *info;
@@ -821,13 +804,16 @@ handle_ipi(struct pt_regs *regs)
 			/* Notify the sending CPU that the task is done.  */
 			mb();
 			if (wait) atomic_dec (&data->unfinished_count);
-		}
-		else if (which == IPI_CPU_STOP) {
+			break;
+		    }
+
+		case IPI_CPU_STOP:
 			halt();
-		}
-		else {
+
+		default:
 			printk(KERN_CRIT "Unknown IPI on CPU %d: %lu\n",
 			       this_cpu, which);
+			break;
 		}
 	  } while (ops);
 
@@ -851,10 +837,23 @@ smp_send_reschedule(int cpu)
 	send_ipi_message(1UL << cpu, IPI_RESCHEDULE);
 }
 
+void
+smp_migrate_task(int cpu, task_t *t)
+{
+#if DEBUG_IPI_MSG
+	if (cpu == hard_smp_processor_id())
+		printk(KERN_WARNING
+		       "smp_migrate_task: Sending IPI to self.\n");
+#endif
+	/* Acquire the migration_task mutex.  */
+	pointer_lock(&migration_task, t, 1);
+	send_ipi_message(1UL << cpu, IPI_MIGRATION);
+}
+
 void
 smp_send_stop(void)
 {
-	unsigned long to_whom = cpu_present_mask ^ (1UL << smp_processor_id());
+	unsigned long to_whom = cpu_present_mask & ~(1UL << smp_processor_id());
 #if DEBUG_IPI_MSG
 	if (hard_smp_processor_id() != boot_cpu_id)
 		printk(KERN_WARNING "smp_send_stop: Not on boot cpu.\n");
@@ -881,16 +880,13 @@ smp_call_function_on_cpu (void (*func) (void *info), void *info, int retry,
 	struct smp_call_struct data;
 	long timeout;
 	int num_cpus_to_call;
-	long i,j;
 	
 	data.func = func;
 	data.info = info;
 	data.wait = wait;
 
 	to_whom &= ~(1L << smp_processor_id());
-	for (i = 0, j = 1, num_cpus_to_call = 0; i < NR_CPUS; ++i, j <<= 1)
-		if (to_whom & j)
-			num_cpus_to_call++;
+	num_cpus_to_call = hweight64(to_whom);
 
 	atomic_set(&data.unstarted_count, num_cpus_to_call);
 	atomic_set(&data.unfinished_count, num_cpus_to_call);
@@ -1094,7 +1090,7 @@ flush_icache_page(struct vm_area_struct *vma, struct page *page)
 
 #ifdef CONFIG_DEBUG_SPINLOCK
 void
-spin_unlock(spinlock_t * lock)
+_raw_spin_unlock(spinlock_t * lock)
 {
 	mb();
 	lock->lock = 0;
@@ -1185,7 +1181,7 @@ debug_spin_trylock(spinlock_t * lock, const char *base_file, int line_no)
 #endif /* CONFIG_DEBUG_SPINLOCK */
 
 #ifdef CONFIG_DEBUG_RWLOCK
-void write_lock(rwlock_t * lock)
+void _raw_write_lock(rwlock_t * lock)
 {
 	long regx, regy;
 	int stuck_lock, stuck_reader;
@@ -1230,7 +1226,7 @@ void write_lock(rwlock_t * lock)
 	}
 }
 
-void read_lock(rwlock_t * lock)
+void _raw_read_lock(rwlock_t * lock)
 {
 	long regx;
 	int stuck_lock;

include/asm-alpha/bitops.h

@@ -3,6 +3,7 @@
 
 #include <linux/config.h>
 #include <linux/kernel.h>
+#include <asm/compiler.h>
 
 /*
  * Copyright 1994, Linus Torvalds.
@@ -60,14 +61,14 @@ clear_bit(unsigned long nr, volatile void * addr)
 
 	__asm__ __volatile__(
 	"1:	ldl_l %0,%3\n"
-	"	and %0,%2,%0\n"
+	"	bic %0,%2,%0\n"
 	"	stl_c %0,%1\n"
 	"	beq %0,2f\n"
 	".subsection 2\n"
 	"2:	br 1b\n"
 	".previous"
 	:"=&r" (temp), "=m" (*m)
-	:"Ir" (~(1UL << (nr & 31))), "m" (*m));
+	:"Ir" (1UL << (nr & 31)), "m" (*m));
 }
 
 /*
@@ -246,12 +247,15 @@ test_bit(int nr, volatile void * addr)
  */
 static inline unsigned long ffz_b(unsigned long x)
 {
-	unsigned long sum = 0;
+	unsigned long sum, x1, x2, x4;
 
 	x = ~x & -~x;		/* set first 0 bit, clear others */
-	if (x & 0xF0) sum += 4;
-	if (x & 0xCC) sum += 2;
-	if (x & 0xAA) sum += 1;
+	x1 = x & 0xAA;
+	x2 = x & 0xCC;
+	x4 = x & 0xF0;
+	sum = x2 ? 2 : 0;
+	sum += (x4 != 0) * 4;
+	sum += (x1 != 0);
 
 	return sum;
 }
@@ -268,7 +272,7 @@ static inline unsigned long ffz(unsigned long word)
 
 	__asm__("cmpbge %1,%2,%0" : "=r"(bits) : "r"(word), "r"(~0UL));
 	qofs = ffz_b(bits);
-	__asm__("extbl %1,%2,%0" : "=r"(bits) : "r"(word), "r"(qofs));
+	bits = __kernel_extbl(word, qofs);
 	bofs = ffz_b(bits);
 
 	return qofs*8 + bofs;
@@ -290,7 +294,7 @@ static inline unsigned long __ffs(unsigned long word)
 
 	__asm__("cmpbge $31,%1,%0" : "=r"(bits) : "r"(word));
 	qofs = ffz_b(bits);
-	__asm__("extbl %1,%2,%0" : "=r"(bits) : "r"(word), "r"(qofs));
+	bits = __kernel_extbl(word, qofs);
 	bofs = ffz_b(~bits);
 
 	return qofs*8 + bofs;
@@ -349,6 +353,14 @@ static inline unsigned long hweight64(unsigned long w)
 #define hweight16(x) hweight64((x) & 0xfffful)
 #define hweight8(x)  hweight64((x) & 0xfful)
 #else
+static inline unsigned long hweight64(unsigned long w)
+{
+	unsigned long result;
+	for (result = 0; w ; w >>= 1)
+		result += (w & 1);
+	return result;
+}
+
 #define hweight32(x) generic_hweight32(x)
 #define hweight16(x) generic_hweight16(x)
 #define hweight8(x)  generic_hweight8(x)

include/asm-alpha/spinlock.h

@@ -38,12 +38,12 @@ typedef struct {
 #define spin_unlock_wait(x)	({ do { barrier(); } while ((x)->lock); })
 
 #if CONFIG_DEBUG_SPINLOCK
-extern void spin_unlock(spinlock_t * lock);
+extern void _raw_spin_unlock(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 _raw_spin_lock(LOCK) debug_spin_lock(LOCK, __BASE_FILE__, __LINE__)
+#define _raw_spin_trylock(LOCK) debug_spin_trylock(LOCK, __BASE_FILE__, __LINE__)
 
 #define spin_lock_own(LOCK, LOCATION)					\
 do {									\
@@ -54,13 +54,13 @@ do {									\
 		       (LOCK)->lock ? "taken" : "freed", (LOCK)->on_cpu); \
 } while (0)
 #else
-static inline void spin_unlock(spinlock_t * lock)
+static inline void _raw_spin_unlock(spinlock_t * lock)
 {
 	mb();
 	lock->lock = 0;
 }
 
-static inline void spin_lock(spinlock_t * lock)
+static inline void _raw_spin_lock(spinlock_t * lock)
 {
 	long tmp;
 
@@ -83,7 +83,11 @@ static inline void spin_lock(spinlock_t * lock)
 	: "m"(lock->lock) : "memory");
 }
 
-#define spin_trylock(lock) (!test_and_set_bit(0,(lock)))
+static inline int _raw_spin_trylock(spinlock_t *lock)
+{
+	return !test_and_set_bit(0, &lock->lock);
+}
+
 #define spin_lock_own(LOCK, LOCATION)	((void)0)
 #endif /* CONFIG_DEBUG_SPINLOCK */
 
@@ -98,10 +102,10 @@ typedef struct {
 #define rwlock_init(x)	do { *(x) = RW_LOCK_UNLOCKED; } while(0)
 
 #if CONFIG_DEBUG_RWLOCK
-extern void write_lock(rwlock_t * lock);
-extern void read_lock(rwlock_t * lock);
+extern void _raw_write_lock(rwlock_t * lock);
+extern void _raw_read_lock(rwlock_t * lock);
 #else
-static inline void write_lock(rwlock_t * lock)
+static inline void _raw_write_lock(rwlock_t * lock)
 {
 	long regx;
 
@@ -121,7 +125,7 @@ static inline void write_lock(rwlock_t * lock)
 	: "0" (*(volatile int *)lock) : "memory");
 }
 
-static inline void read_lock(rwlock_t * lock)
+static inline void _raw_read_lock(rwlock_t * lock)
 {
 	long regx;
 
@@ -142,13 +146,13 @@ static inline void read_lock(rwlock_t * lock)
 }
 #endif /* CONFIG_DEBUG_RWLOCK */
 
-static inline void write_unlock(rwlock_t * lock)
+static inline void _raw_write_unlock(rwlock_t * lock)
 {
 	mb();
 	*(volatile int *)lock = 0;
 }
 
-static inline void read_unlock(rwlock_t * lock)
+static inline void _raw_read_unlock(rwlock_t * lock)
 {
 	long regx;
 	__asm__ __volatile__(