Pull release into acpica branch

10 files changed, 33 insertions, 95 deletions

diff --git a/include/asm-alpha/atomic.h b/include/asm-alpha/atomic.h
index cb03bbe92cdf..fc77f7413083 100644
--- a/include/asm-alpha/atomic.h
+++ b/include/asm-alpha/atomic.h
@@ -176,6 +176,7 @@ static __inline__ long atomic64_sub_return(long i, atomic64_t * v)
 }
 
 #define atomic_cmpxchg(v, o, n) ((int)cmpxchg(&((v)->counter), (o), (n)))
+#define atomic_xchg(v, new) (xchg(&((v)->counter), new))
 
 #define atomic_add_unless(v, a, u)				\
 ({								\
diff --git a/include/asm-alpha/cache.h b/include/asm-alpha/cache.h
index e69b29501a5f..e6d4d1695e25 100644
--- a/include/asm-alpha/cache.h
+++ b/include/asm-alpha/cache.h
@@ -20,6 +20,5 @@
 
 #define L1_CACHE_ALIGN(x)  (((x)+(L1_CACHE_BYTES-1))&~(L1_CACHE_BYTES-1))
 #define SMP_CACHE_BYTES    L1_CACHE_BYTES
-#define L1_CACHE_SHIFT_MAX L1_CACHE_SHIFT
 
 #endif
diff --git a/include/asm-alpha/compiler.h b/include/asm-alpha/compiler.h
index 0a4a8b40dfcd..00c6f57ad9a7 100644
--- a/include/asm-alpha/compiler.h
+++ b/include/asm-alpha/compiler.h
@@ -98,9 +98,7 @@
 #undef inline
 #undef __inline__
 #undef __inline
-#if __GNUC__ == 3 && __GNUC_MINOR__ >= 1 || __GNUC__ > 3
 #undef __always_inline
 #define __always_inline		inline __attribute__((always_inline))
-#endif
 
 #endif /* __ALPHA_COMPILER_H */
diff --git a/include/asm-alpha/futex.h b/include/asm-alpha/futex.h
index 9feff4ce1424..6a332a9f099c 100644
--- a/include/asm-alpha/futex.h
+++ b/include/asm-alpha/futex.h
@@ -1,53 +1,6 @@
 #ifndef _ASM_FUTEX_H
 #define _ASM_FUTEX_H
 
-#ifdef __KERNEL__
+#include <asm-generic/futex.h>
 
-#include <linux/futex.h>
-#include <asm/errno.h>
-#include <asm/uaccess.h>
-
-static inline int
-futex_atomic_op_inuser (int encoded_op, int __user *uaddr)
-{
-	int op = (encoded_op >> 28) & 7;
-	int cmp = (encoded_op >> 24) & 15;
-	int oparg = (encoded_op << 8) >> 20;
-	int cmparg = (encoded_op << 20) >> 20;
-	int oldval = 0, ret;
-	if (encoded_op & (FUTEX_OP_OPARG_SHIFT << 28))
-		oparg = 1 << oparg;
-
-	if (! access_ok (VERIFY_WRITE, uaddr, sizeof(int)))
-		return -EFAULT;
-
-	inc_preempt_count();
-
-	switch (op) {
-	case FUTEX_OP_SET:
-	case FUTEX_OP_ADD:
-	case FUTEX_OP_OR:
-	case FUTEX_OP_ANDN:
-	case FUTEX_OP_XOR:
-	default:
-		ret = -ENOSYS;
-	}
-
-	dec_preempt_count();
-
-	if (!ret) {
-		switch (cmp) {
-		case FUTEX_OP_CMP_EQ: ret = (oldval == cmparg); break;
-		case FUTEX_OP_CMP_NE: ret = (oldval != cmparg); break;
-		case FUTEX_OP_CMP_LT: ret = (oldval < cmparg); break;
-		case FUTEX_OP_CMP_GE: ret = (oldval >= cmparg); break;
-		case FUTEX_OP_CMP_LE: ret = (oldval <= cmparg); break;
-		case FUTEX_OP_CMP_GT: ret = (oldval > cmparg); break;
-		default: ret = -ENOSYS;
-		}
-	}
-	return ret;
-}
-
-#endif
 #endif
diff --git a/include/asm-alpha/mmu_context.h b/include/asm-alpha/mmu_context.h
index a714d0cdc204..6f92482cc96c 100644
--- a/include/asm-alpha/mmu_context.h
+++ b/include/asm-alpha/mmu_context.h
@@ -156,7 +156,7 @@ ev5_switch_mm(struct mm_struct *prev_mm, struct mm_struct *next_mm,
 	/* Always update the PCB ASN.  Another thread may have allocated
 	   a new mm->context (via flush_tlb_mm) without the ASN serial
 	   number wrapping.  We have no way to detect when this is needed.  */
-	next->thread_info->pcb.asn = mmc & HARDWARE_ASN_MASK;
+	task_thread_info(next)->pcb.asn = mmc & HARDWARE_ASN_MASK;
 }
 
 __EXTERN_INLINE void
@@ -235,7 +235,7 @@ init_new_context(struct task_struct *tsk, struct mm_struct *mm)
 		if (cpu_online(i))
 			mm->context[i] = 0;
 	if (tsk != current)
-		tsk->thread_info->pcb.ptbr
+		task_thread_info(tsk)->pcb.ptbr
 		  = ((unsigned long)mm->pgd - IDENT_ADDR) >> PAGE_SHIFT;
 	return 0;
 }
@@ -249,7 +249,7 @@ destroy_context(struct mm_struct *mm)
 static inline void
 enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
 {
-	tsk->thread_info->pcb.ptbr
+	task_thread_info(tsk)->pcb.ptbr
 	  = ((unsigned long)mm->pgd - IDENT_ADDR) >> PAGE_SHIFT;
 }
 
diff --git a/include/asm-alpha/mutex.h b/include/asm-alpha/mutex.h
new file mode 100644
index 000000000000..458c1f7fbc18
--- /dev/null
+++ b/include/asm-alpha/mutex.h
@@ -0,0 +1,9 @@
+/*
+ * Pull in the generic implementation for the mutex fastpath.
+ *
+ * TODO: implement optimized primitives instead, or leave the generic
+ * implementation in place, or pick the atomic_xchg() based generic
+ * implementation. (see asm-generic/mutex-xchg.h for details)
+ */
+
+#include <asm-generic/mutex-dec.h>
diff --git a/include/asm-alpha/processor.h b/include/asm-alpha/processor.h
index 059780a7d3d7..425b7b6d28cb 100644
--- a/include/asm-alpha/processor.h
+++ b/include/asm-alpha/processor.h
@@ -52,19 +52,10 @@ extern long kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
 
 unsigned long get_wchan(struct task_struct *p);
 
-/* See arch/alpha/kernel/ptrace.c for details.  */
-#define PT_REG(reg) \
-  (PAGE_SIZE*2 - sizeof(struct pt_regs) + offsetof(struct pt_regs, reg))
-
-#define SW_REG(reg) \
- (PAGE_SIZE*2 - sizeof(struct pt_regs) - sizeof(struct switch_stack) \
-  + offsetof(struct switch_stack, reg))
-
-#define KSTK_EIP(tsk) \
-  (*(unsigned long *)(PT_REG(pc) + (unsigned long) ((tsk)->thread_info)))
+#define KSTK_EIP(tsk) (task_pt_regs(tsk)->pc)
 
 #define KSTK_ESP(tsk) \
-  ((tsk) == current ? rdusp() : (tsk)->thread_info->pcb.usp)
+  ((tsk) == current ? rdusp() : task_thread_info(tsk)->pcb.usp)
 
 #define cpu_relax()	barrier()
 
@@ -77,7 +68,6 @@ unsigned long get_wchan(struct task_struct *p);
 #define spin_lock_prefetch(lock)  	do { } while (0)
 #endif
 
-#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 1)
 extern inline void prefetch(const void *ptr)  
 { 
 	__builtin_prefetch(ptr, 0, 3);
@@ -95,24 +85,4 @@ extern inline void spin_lock_prefetch(const void *ptr)
 }
 #endif
 
-#else
-extern inline void prefetch(const void *ptr)  
-{ 
-	__asm__ ("ldl $31,%0" : : "m"(*(char *)ptr)); 
-}
-
-extern inline void prefetchw(const void *ptr)  
-{
-	__asm__ ("ldq $31,%0" : : "m"(*(char *)ptr)); 
-}
-
-#ifdef CONFIG_SMP
-extern inline void spin_lock_prefetch(const void *ptr)  
-{
-	__asm__ ("ldq $31,%0" : : "m"(*(char *)ptr)); 
-}
-#endif
-
-#endif /* GCC 3.1 */
-
 #endif /* __ASM_ALPHA_PROCESSOR_H */
diff --git a/include/asm-alpha/ptrace.h b/include/asm-alpha/ptrace.h
index 072375c135b4..9933b8b3612e 100644
--- a/include/asm-alpha/ptrace.h
+++ b/include/asm-alpha/ptrace.h
@@ -75,10 +75,10 @@ struct switch_stack {
 #define profile_pc(regs) instruction_pointer(regs)
 extern void show_regs(struct pt_regs *);
 
-#define alpha_task_regs(task) \
-  ((struct pt_regs *) ((long) (task)->thread_info + 2*PAGE_SIZE) - 1)
+#define task_pt_regs(task) \
+  ((struct pt_regs *) (task_stack_page(task) + 2*PAGE_SIZE) - 1)
 
-#define force_successful_syscall_return() (alpha_task_regs(current)->r0 = 0)
+#define force_successful_syscall_return() (task_pt_regs(current)->r0 = 0)
 
 #endif
 
diff --git a/include/asm-alpha/system.h b/include/asm-alpha/system.h
index 050e86d12891..cc9c7e8cced5 100644
--- a/include/asm-alpha/system.h
+++ b/include/asm-alpha/system.h
@@ -131,15 +131,25 @@ struct el_common_EV6_mcheck {
 extern void halt(void) __attribute__((noreturn));
 #define __halt() __asm__ __volatile__ ("call_pal %0 #halt" : : "i" (PAL_halt))
 
-#define switch_to(P,N,L)						\
-  do {									\
-    (L) = alpha_switch_to(virt_to_phys(&(N)->thread_info->pcb), (P));	\
-    check_mmu_context();						\
+#define switch_to(P,N,L)						 \
+  do {									 \
+    (L) = alpha_switch_to(virt_to_phys(&task_thread_info(N)->pcb), (P)); \
+    check_mmu_context();						 \
   } while (0)
 
 struct task_struct;
 extern struct task_struct *alpha_switch_to(unsigned long, struct task_struct*);
 
+/*
+ * On SMP systems, when the scheduler does migration-cost autodetection,
+ * it needs a way to flush as much of the CPU's caches as possible.
+ *
+ * TODO: fill this in!
+ */
+static inline void sched_cacheflush(void)
+{
+}
+
 #define imb() \
 __asm__ __volatile__ ("call_pal %0 #imb" : : "i" (PAL_imb) : "memory")
 
diff --git a/include/asm-alpha/thread_info.h b/include/asm-alpha/thread_info.h
index d51491ed00b8..69ffd93f8e22 100644
--- a/include/asm-alpha/thread_info.h
+++ b/include/asm-alpha/thread_info.h
@@ -54,8 +54,6 @@ register struct thread_info *__current_thread_info __asm__("$8");
 #define alloc_thread_info(tsk) \
   ((struct thread_info *) __get_free_pages(GFP_KERNEL,1))
 #define free_thread_info(ti) free_pages((unsigned long) (ti), 1)
-#define get_thread_info(ti) get_task_struct((ti)->task)
-#define put_thread_info(ti) put_task_struct((ti)->task)
 
 #endif /* __ASSEMBLY__ */