Moved, renamed, and deleted files

The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.

1 files changed, 219 insertions, 0 deletions

diff --git a/arch/s390/lib/spinlock.c b/arch/s390/lib/spinlock.c
new file mode 100644
index 00000000..093eb694
--- /dev/null
+++ b/arch/s390/lib/spinlock.c
@@ -0,0 +1,219 @@
+/*
+ *  arch/s390/lib/spinlock.c
+ *    Out of line spinlock code.
+ *
+ *    Copyright (C) IBM Corp. 2004, 2006
+ *    Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
+ */
+
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/spinlock.h>
+#include <linux/init.h>
+#include <linux/smp.h>
+#include <asm/io.h>
+
+int spin_retry = 1000;
+
+/**
+ * spin_retry= parameter
+ */
+static int __init spin_retry_setup(char *str)
+{
+	spin_retry = simple_strtoul(str, &str, 0);
+	return 1;
+}
+__setup("spin_retry=", spin_retry_setup);
+
+void arch_spin_lock_wait(arch_spinlock_t *lp)
+{
+	int count = spin_retry;
+	unsigned int cpu = ~smp_processor_id();
+	unsigned int owner;
+
+	while (1) {
+		owner = lp->owner_cpu;
+		if (!owner || smp_vcpu_scheduled(~owner)) {
+			for (count = spin_retry; count > 0; count--) {
+				if (arch_spin_is_locked(lp))
+					continue;
+				if (_raw_compare_and_swap(&lp->owner_cpu, 0,
+							  cpu) == 0)
+					return;
+			}
+			if (MACHINE_IS_LPAR)
+				continue;
+		}
+		owner = lp->owner_cpu;
+		if (owner)
+			smp_yield_cpu(~owner);
+		if (_raw_compare_and_swap(&lp->owner_cpu, 0, cpu) == 0)
+			return;
+	}
+}
+EXPORT_SYMBOL(arch_spin_lock_wait);
+
+void arch_spin_lock_wait_flags(arch_spinlock_t *lp, unsigned long flags)
+{
+	int count = spin_retry;
+	unsigned int cpu = ~smp_processor_id();
+	unsigned int owner;
+
+	local_irq_restore(flags);
+	while (1) {
+		owner = lp->owner_cpu;
+		if (!owner || smp_vcpu_scheduled(~owner)) {
+			for (count = spin_retry; count > 0; count--) {
+				if (arch_spin_is_locked(lp))
+					continue;
+				local_irq_disable();
+				if (_raw_compare_and_swap(&lp->owner_cpu, 0,
+							  cpu) == 0)
+					return;
+				local_irq_restore(flags);
+			}
+			if (MACHINE_IS_LPAR)
+				continue;
+		}
+		owner = lp->owner_cpu;
+		if (owner)
+			smp_yield_cpu(~owner);
+		local_irq_disable();
+		if (_raw_compare_and_swap(&lp->owner_cpu, 0, cpu) == 0)
+			return;
+		local_irq_restore(flags);
+	}
+}
+EXPORT_SYMBOL(arch_spin_lock_wait_flags);
+
+int arch_spin_trylock_retry(arch_spinlock_t *lp)
+{
+	unsigned int cpu = ~smp_processor_id();
+	int count;
+
+	for (count = spin_retry; count > 0; count--) {
+		if (arch_spin_is_locked(lp))
+			continue;
+		if (_raw_compare_and_swap(&lp->owner_cpu, 0, cpu) == 0)
+			return 1;
+	}
+	return 0;
+}
+EXPORT_SYMBOL(arch_spin_trylock_retry);
+
+void arch_spin_relax(arch_spinlock_t *lock)
+{
+	unsigned int cpu = lock->owner_cpu;
+	if (cpu != 0) {
+		if (MACHINE_IS_VM || MACHINE_IS_KVM ||
+		    !smp_vcpu_scheduled(~cpu))
+			smp_yield_cpu(~cpu);
+	}
+}
+EXPORT_SYMBOL(arch_spin_relax);
+
+void _raw_read_lock_wait(arch_rwlock_t *rw)
+{
+	unsigned int old;
+	int count = spin_retry;
+
+	while (1) {
+		if (count-- <= 0) {
+			smp_yield();
+			count = spin_retry;
+		}
+		if (!arch_read_can_lock(rw))
+			continue;
+		old = rw->lock & 0x7fffffffU;
+		if (_raw_compare_and_swap(&rw->lock, old, old + 1) == old)
+			return;
+	}
+}
+EXPORT_SYMBOL(_raw_read_lock_wait);
+
+void _raw_read_lock_wait_flags(arch_rwlock_t *rw, unsigned long flags)
+{
+	unsigned int old;
+	int count = spin_retry;
+
+	local_irq_restore(flags);
+	while (1) {
+		if (count-- <= 0) {
+			smp_yield();
+			count = spin_retry;
+		}
+		if (!arch_read_can_lock(rw))
+			continue;
+		old = rw->lock & 0x7fffffffU;
+		local_irq_disable();
+		if (_raw_compare_and_swap(&rw->lock, old, old + 1) == old)
+			return;
+	}
+}
+EXPORT_SYMBOL(_raw_read_lock_wait_flags);
+
+int _raw_read_trylock_retry(arch_rwlock_t *rw)
+{
+	unsigned int old;
+	int count = spin_retry;
+
+	while (count-- > 0) {
+		if (!arch_read_can_lock(rw))
+			continue;
+		old = rw->lock & 0x7fffffffU;
+		if (_raw_compare_and_swap(&rw->lock, old, old + 1) == old)
+			return 1;
+	}
+	return 0;
+}
+EXPORT_SYMBOL(_raw_read_trylock_retry);
+
+void _raw_write_lock_wait(arch_rwlock_t *rw)
+{
+	int count = spin_retry;
+
+	while (1) {
+		if (count-- <= 0) {
+			smp_yield();
+			count = spin_retry;
+		}
+		if (!arch_write_can_lock(rw))
+			continue;
+		if (_raw_compare_and_swap(&rw->lock, 0, 0x80000000) == 0)
+			return;
+	}
+}
+EXPORT_SYMBOL(_raw_write_lock_wait);
+
+void _raw_write_lock_wait_flags(arch_rwlock_t *rw, unsigned long flags)
+{
+	int count = spin_retry;
+
+	local_irq_restore(flags);
+	while (1) {
+		if (count-- <= 0) {
+			smp_yield();
+			count = spin_retry;
+		}
+		if (!arch_write_can_lock(rw))
+			continue;
+		local_irq_disable();
+		if (_raw_compare_and_swap(&rw->lock, 0, 0x80000000) == 0)
+			return;
+	}
+}
+EXPORT_SYMBOL(_raw_write_lock_wait_flags);
+
+int _raw_write_trylock_retry(arch_rwlock_t *rw)
+{
+	int count = spin_retry;
+
+	while (count-- > 0) {
+		if (!arch_write_can_lock(rw))
+			continue;
+		if (_raw_compare_and_swap(&rw->lock, 0, 0x80000000) == 0)
+			return 1;
+	}
+	return 0;
+}
+EXPORT_SYMBOL(_raw_write_trylock_retry);