Merge branch 'master' of /home/davem/src/GIT/linux-2.6/

16 files changed, 188 insertions, 435 deletions

diff --git a/arch/alpha/Kconfig b/arch/alpha/Kconfig
index bd7261ea8f9..75291fdd379 100644
--- a/arch/alpha/Kconfig
+++ b/arch/alpha/Kconfig
@@ -10,6 +10,7 @@ config ALPHA
 	select HAVE_OPROFILE
 	select HAVE_SYSCALL_WRAPPERS
 	select HAVE_PERF_EVENTS
+	select HAVE_DMA_ATTRS
 	help
 	  The Alpha is a 64-bit general-purpose processor designed and
 	  marketed by the Digital Equipment Corporation of blessed memory,
@@ -58,6 +59,9 @@ config ZONE_DMA
 	bool
 	default y
 
+config NEED_DMA_MAP_STATE
+       def_bool y
+
 config GENERIC_ISA_DMA
 	bool
 	default y
diff --git a/arch/alpha/include/asm/core_marvel.h b/arch/alpha/include/asm/core_marvel.h
index 30d55fe7aaf..dad300fa14c 100644
--- a/arch/alpha/include/asm/core_marvel.h
+++ b/arch/alpha/include/asm/core_marvel.h
@@ -12,7 +12,6 @@
 #define __ALPHA_MARVEL__H__
 
 #include <linux/types.h>
-#include <linux/pci.h>
 #include <linux/spinlock.h>
 
 #include <asm/compiler.h>
diff --git a/arch/alpha/include/asm/core_mcpcia.h b/arch/alpha/include/asm/core_mcpcia.h
index acf55b48347..21ac53383b3 100644
--- a/arch/alpha/include/asm/core_mcpcia.h
+++ b/arch/alpha/include/asm/core_mcpcia.h
@@ -6,7 +6,6 @@
 #define MCPCIA_ONE_HAE_WINDOW 1
 
 #include <linux/types.h>
-#include <linux/pci.h>
 #include <asm/compiler.h>
 
 /*
diff --git a/arch/alpha/include/asm/core_titan.h b/arch/alpha/include/asm/core_titan.h
index a17f6f33b68..8cf79d1219e 100644
--- a/arch/alpha/include/asm/core_titan.h
+++ b/arch/alpha/include/asm/core_titan.h
@@ -2,7 +2,6 @@
 #define __ALPHA_TITAN__H__
 
 #include <linux/types.h>
-#include <linux/pci.h>
 #include <asm/compiler.h>
 
 /*
diff --git a/arch/alpha/include/asm/core_tsunami.h b/arch/alpha/include/asm/core_tsunami.h
index 58d4fe48742..8e39ecf0941 100644
--- a/arch/alpha/include/asm/core_tsunami.h
+++ b/arch/alpha/include/asm/core_tsunami.h
@@ -2,7 +2,6 @@
 #define __ALPHA_TSUNAMI__H__
 
 #include <linux/types.h>
-#include <linux/pci.h>
 #include <asm/compiler.h>
 
 /*
diff --git a/arch/alpha/include/asm/dma-mapping.h b/arch/alpha/include/asm/dma-mapping.h
index 04eb5681448..1bce8169733 100644
--- a/arch/alpha/include/asm/dma-mapping.h
+++ b/arch/alpha/include/asm/dma-mapping.h
@@ -1,71 +1,49 @@
 #ifndef _ALPHA_DMA_MAPPING_H
 #define _ALPHA_DMA_MAPPING_H
 
+#include <linux/dma-attrs.h>
 
-#ifdef CONFIG_PCI
+extern struct dma_map_ops *dma_ops;
 
-#include <linux/pci.h>
+static inline struct dma_map_ops *get_dma_ops(struct device *dev)
+{
+	return dma_ops;
+}
 
-#define dma_map_single(dev, va, size, dir)		\
-		pci_map_single(alpha_gendev_to_pci(dev), va, size, dir)
-#define dma_unmap_single(dev, addr, size, dir)		\
-		pci_unmap_single(alpha_gendev_to_pci(dev), addr, size, dir)
-#define dma_alloc_coherent(dev, size, addr, gfp)	\
-	      __pci_alloc_consistent(alpha_gendev_to_pci(dev), size, addr, gfp)
-#define dma_free_coherent(dev, size, va, addr)		\
-		pci_free_consistent(alpha_gendev_to_pci(dev), size, va, addr)
-#define dma_map_page(dev, page, off, size, dir)		\
-		pci_map_page(alpha_gendev_to_pci(dev), page, off, size, dir)
-#define dma_unmap_page(dev, addr, size, dir)		\
-		pci_unmap_page(alpha_gendev_to_pci(dev), addr, size, dir)
-#define dma_map_sg(dev, sg, nents, dir)			\
-		pci_map_sg(alpha_gendev_to_pci(dev), sg, nents, dir)
-#define dma_unmap_sg(dev, sg, nents, dir)		\
-		pci_unmap_sg(alpha_gendev_to_pci(dev), sg, nents, dir)
-#define dma_supported(dev, mask)			\
-		pci_dma_supported(alpha_gendev_to_pci(dev), mask)
-#define dma_mapping_error(dev, addr)				\
-		pci_dma_mapping_error(alpha_gendev_to_pci(dev), addr)
+#include <asm-generic/dma-mapping-common.h>
 
-#else	/* no PCI - no IOMMU. */
+static inline void *dma_alloc_coherent(struct device *dev, size_t size,
+				       dma_addr_t *dma_handle, gfp_t gfp)
+{
+	return get_dma_ops(dev)->alloc_coherent(dev, size, dma_handle, gfp);
+}
 
-#include <asm/io.h>	/* for virt_to_phys() */
+static inline void dma_free_coherent(struct device *dev, size_t size,
+				     void *vaddr, dma_addr_t dma_handle)
+{
+	get_dma_ops(dev)->free_coherent(dev, size, vaddr, dma_handle);
+}
 
-struct scatterlist;
-void *dma_alloc_coherent(struct device *dev, size_t size,
-			 dma_addr_t *dma_handle, gfp_t gfp);
-int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
-	       enum dma_data_direction direction);
+static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
+{
+	return get_dma_ops(dev)->mapping_error(dev, dma_addr);
+}
 
-#define dma_free_coherent(dev, size, va, addr)		\
-		free_pages((unsigned long)va, get_order(size))
-#define dma_supported(dev, mask)		(mask < 0x00ffffffUL ? 0 : 1)
-#define dma_map_single(dev, va, size, dir)	virt_to_phys(va)
-#define dma_map_page(dev, page, off, size, dir)	(page_to_pa(page) + off)
+static inline int dma_supported(struct device *dev, u64 mask)
+{
+	return get_dma_ops(dev)->dma_supported(dev, mask);
+}
 
-#define dma_unmap_single(dev, addr, size, dir)	((void)0)
-#define dma_unmap_page(dev, addr, size, dir)	((void)0)
-#define dma_unmap_sg(dev, sg, nents, dir)	((void)0)
-
-#define dma_mapping_error(dev, addr)  (0)
-
-#endif	/* !CONFIG_PCI */
+static inline int dma_set_mask(struct device *dev, u64 mask)
+{
+	return get_dma_ops(dev)->set_dma_mask(dev, mask);
+}
 
 #define dma_alloc_noncoherent(d, s, h, f)	dma_alloc_coherent(d, s, h, f)
 #define dma_free_noncoherent(d, s, v, h)	dma_free_coherent(d, s, v, h)
 #define dma_is_consistent(d, h)			(1)
 
-int dma_set_mask(struct device *dev, u64 mask);
-
-#define dma_sync_single_for_cpu(dev, addr, size, dir)	  ((void)0)
-#define dma_sync_single_for_device(dev, addr, size, dir)  ((void)0)
-#define dma_sync_single_range(dev, addr, off, size, dir)  ((void)0)
-#define dma_sync_sg_for_cpu(dev, sg, nents, dir)	  ((void)0)
-#define dma_sync_sg_for_device(dev, sg, nents, dir)	  ((void)0)
 #define dma_cache_sync(dev, va, size, dir)		  ((void)0)
-#define dma_sync_single_range_for_cpu(dev, addr, offset, size, dir)	((void)0)
-#define dma_sync_single_range_for_device(dev, addr, offset, size, dir)	((void)0)
-
 #define dma_get_cache_alignment()			  L1_CACHE_BYTES
 
 #endif	/* _ALPHA_DMA_MAPPING_H */
diff --git a/arch/alpha/include/asm/local.h b/arch/alpha/include/asm/local.h
index 6ad3ea69642..b9e3e331837 100644
--- a/arch/alpha/include/asm/local.h
+++ b/arch/alpha/include/asm/local.h
@@ -98,21 +98,4 @@ static __inline__ long local_sub_return(long i, local_t * l)
 #define __local_add(i,l)	((l)->a.counter+=(i))
 #define __local_sub(i,l)	((l)->a.counter-=(i))
 
-/* Use these for per-cpu local_t variables: on some archs they are
- * much more efficient than these naive implementations.  Note they take
- * a variable, not an address.
- */
-#define cpu_local_read(l)	local_read(&__get_cpu_var(l))
-#define cpu_local_set(l, i)	local_set(&__get_cpu_var(l), (i))
-
-#define cpu_local_inc(l)	local_inc(&__get_cpu_var(l))
-#define cpu_local_dec(l)	local_dec(&__get_cpu_var(l))
-#define cpu_local_add(i, l)	local_add((i), &__get_cpu_var(l))
-#define cpu_local_sub(i, l)	local_sub((i), &__get_cpu_var(l))
-
-#define __cpu_local_inc(l)	__local_inc(&__get_cpu_var(l))
-#define __cpu_local_dec(l)	__local_dec(&__get_cpu_var(l))
-#define __cpu_local_add(i, l)	__local_add((i), &__get_cpu_var(l))
-#define __cpu_local_sub(i, l)	__local_sub((i), &__get_cpu_var(l))
-
 #endif /* _ALPHA_LOCAL_H */
diff --git a/arch/alpha/include/asm/pci.h b/arch/alpha/include/asm/pci.h
index dd8dcabf160..28d0497fd3c 100644
--- a/arch/alpha/include/asm/pci.h
+++ b/arch/alpha/include/asm/pci.h
@@ -70,142 +70,11 @@ extern inline void pcibios_penalize_isa_irq(int irq, int active)
    decisions.  */
 #define PCI_DMA_BUS_IS_PHYS  0
 
-/* Allocate and map kernel buffer using consistent mode DMA for PCI
-   device.  Returns non-NULL cpu-view pointer to the buffer if
-   successful and sets *DMA_ADDRP to the pci side dma address as well,
-   else DMA_ADDRP is undefined.  */
-
-extern void *__pci_alloc_consistent(struct pci_dev *, size_t,
-				    dma_addr_t *, gfp_t);
-static inline void *
-pci_alloc_consistent(struct pci_dev *dev, size_t size, dma_addr_t *dma)
-{
-	return __pci_alloc_consistent(dev, size, dma, GFP_ATOMIC);
-}
-
-/* Free and unmap a consistent DMA buffer.  CPU_ADDR and DMA_ADDR must
-   be values that were returned from pci_alloc_consistent.  SIZE must
-   be the same as what as passed into pci_alloc_consistent.
-   References to the memory and mappings associated with CPU_ADDR or
-   DMA_ADDR past this call are illegal.  */
-
-extern void pci_free_consistent(struct pci_dev *, size_t, void *, dma_addr_t);
-
-/* Map a single buffer of the indicate size for PCI DMA in streaming mode.
-   The 32-bit PCI bus mastering address to use is returned.  Once the device
-   is given the dma address, the device owns this memory until either
-   pci_unmap_single or pci_dma_sync_single_for_cpu is performed.  */
-
-extern dma_addr_t pci_map_single(struct pci_dev *, void *, size_t, int);
-
-/* Likewise, but for a page instead of an address.  */
-extern dma_addr_t pci_map_page(struct pci_dev *, struct page *,
-			       unsigned long, size_t, int);
-
-/* Test for pci_map_single or pci_map_page having generated an error.  */
-
-static inline int
-pci_dma_mapping_error(struct pci_dev *pdev, dma_addr_t dma_addr)
-{
-	return dma_addr == 0;
-}
-
-/* Unmap a single streaming mode DMA translation.  The DMA_ADDR and
-   SIZE must match what was provided for in a previous pci_map_single
-   call.  All other usages are undefined.  After this call, reads by
-   the cpu to the buffer are guaranteed to see whatever the device
-   wrote there.  */
-
-extern void pci_unmap_single(struct pci_dev *, dma_addr_t, size_t, int);
-extern void pci_unmap_page(struct pci_dev *, dma_addr_t, size_t, int);
-
-/* pci_unmap_{single,page} is not a nop, thus... */
-#define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)	\
-	dma_addr_t ADDR_NAME;
-#define DECLARE_PCI_UNMAP_LEN(LEN_NAME)		\
-	__u32 LEN_NAME;
-#define pci_unmap_addr(PTR, ADDR_NAME)			\
-	((PTR)->ADDR_NAME)
-#define pci_unmap_addr_set(PTR, ADDR_NAME, VAL)		\
-	(((PTR)->ADDR_NAME) = (VAL))
-#define pci_unmap_len(PTR, LEN_NAME)			\
-	((PTR)->LEN_NAME)
-#define pci_unmap_len_set(PTR, LEN_NAME, VAL)		\
-	(((PTR)->LEN_NAME) = (VAL))
-
-/* Map a set of buffers described by scatterlist in streaming mode for
-   PCI DMA.  This is the scatter-gather version of the above
-   pci_map_single interface.  Here the scatter gather list elements
-   are each tagged with the appropriate PCI dma address and length.
-   They are obtained via sg_dma_{address,length}(SG).
-
-   NOTE: An implementation may be able to use a smaller number of DMA
-   address/length pairs than there are SG table elements.  (for
-   example via virtual mapping capabilities) The routine returns the
-   number of addr/length pairs actually used, at most nents.
-
-   Device ownership issues as mentioned above for pci_map_single are
-   the same here.  */
-
-extern int pci_map_sg(struct pci_dev *, struct scatterlist *, int, int);
-
-/* Unmap a set of streaming mode DMA translations.  Again, cpu read
-   rules concerning calls here are the same as for pci_unmap_single()
-   above.  */
-
-extern void pci_unmap_sg(struct pci_dev *, struct scatterlist *, int, int);
-
-/* Make physical memory consistent for a single streaming mode DMA
-   translation after a transfer and device currently has ownership
-   of the buffer.
-
-   If you perform a pci_map_single() but wish to interrogate the
-   buffer using the cpu, yet do not wish to teardown the PCI dma
-   mapping, you must call this function before doing so.  At the next
-   point you give the PCI dma address back to the card, you must first
-   perform a pci_dma_sync_for_device, and then the device again owns
-   the buffer.  */
-
-static inline void
-pci_dma_sync_single_for_cpu(struct pci_dev *dev, dma_addr_t dma_addr,
-			    long size, int direction)
-{
-	/* Nothing to do.  */
-}
-
-static inline void
-pci_dma_sync_single_for_device(struct pci_dev *dev, dma_addr_t dma_addr,
-			       size_t size, int direction)
-{
-	/* Nothing to do.  */
-}
-
-/* Make physical memory consistent for a set of streaming mode DMA
-   translations after a transfer.  The same as pci_dma_sync_single_*
-   but for a scatter-gather list, same rules and usage.  */
-
-static inline void
-pci_dma_sync_sg_for_cpu(struct pci_dev *dev, struct scatterlist *sg,
-			int nents, int direction)
-{
-	/* Nothing to do.  */
-}
-
-static inline void
-pci_dma_sync_sg_for_device(struct pci_dev *dev, struct scatterlist *sg,
-			   int nents, int direction)
-{
-	/* Nothing to do.  */
-}
-
-/* Return whether the given PCI device DMA address mask can
-   be supported properly.  For example, if your device can
-   only drive the low 24-bits during PCI bus mastering, then
-   you would pass 0x00ffffff as the mask to this function.  */
+#ifdef CONFIG_PCI
 
-extern int pci_dma_supported(struct pci_dev *hwdev, u64 mask);
+/* implement the pci_ DMA API in terms of the generic device dma_ one */
+#include <asm-generic/pci-dma-compat.h>
 
-#ifdef CONFIG_PCI
 static inline void pci_dma_burst_advice(struct pci_dev *pdev,
 					enum pci_dma_burst_strategy *strat,
 					unsigned long *strategy_parameter)
@@ -244,8 +113,6 @@ static inline int pci_proc_domain(struct pci_bus *bus)
 	return hose->need_domain_info;
 }
 
-struct pci_dev *alpha_gendev_to_pci(struct device *dev);
-
 #endif /* __KERNEL__ */
 
 /* Values for the `which' argument to sys_pciconfig_iobase.  */
diff --git a/arch/alpha/include/asm/ptrace.h b/arch/alpha/include/asm/ptrace.h
index 32c7a5cddd5..65cf3e28e2f 100644
--- a/arch/alpha/include/asm/ptrace.h
+++ b/arch/alpha/include/asm/ptrace.h
@@ -68,6 +68,7 @@ struct switch_stack {
 
 #ifdef __KERNEL__
 
+#define arch_has_single_step()		(1)
 #define user_mode(regs) (((regs)->ps & 8) != 0)
 #define instruction_pointer(regs) ((regs)->pc)
 #define profile_pc(regs) instruction_pointer(regs)
diff --git a/arch/alpha/kernel/osf_sys.c b/arch/alpha/kernel/osf_sys.c
index 62619f25132..53c213f70fc 100644
--- a/arch/alpha/kernel/osf_sys.c
+++ b/arch/alpha/kernel/osf_sys.c
@@ -361,7 +361,7 @@ osf_procfs_mount(char *dirname, struct procfs_args __user *args, int flags)
 SYSCALL_DEFINE4(osf_mount, unsigned long, typenr, char __user *, path,
 		int, flag, void __user *, data)
 {
-	int retval = -EINVAL;
+	int retval;
 	char *name;
 
 	name = getname(path);
@@ -379,6 +379,7 @@ SYSCALL_DEFINE4(osf_mount, unsigned long, typenr, char __user *, path,
 		retval = osf_procfs_mount(name, data, flag);
 		break;
 	default:
+		retval = -EINVAL;
 		printk("osf_mount(%ld, %x)\n", typenr, flag);
 	}
 	putname(name);
diff --git a/arch/alpha/kernel/pci-noop.c b/arch/alpha/kernel/pci-noop.c
index c19a376520f..823a540f9f5 100644
--- a/arch/alpha/kernel/pci-noop.c
+++ b/arch/alpha/kernel/pci-noop.c
@@ -106,58 +106,8 @@ sys_pciconfig_write(unsigned long bus, unsigned long dfn,
 		return -ENODEV;
 }
 
-/* Stubs for the routines in pci_iommu.c: */
-
-void *
-__pci_alloc_consistent(struct pci_dev *pdev, size_t size,
-		       dma_addr_t *dma_addrp, gfp_t gfp)
-{
-	return NULL;
-}
-
-void
-pci_free_consistent(struct pci_dev *pdev, size_t size, void *cpu_addr,
-		    dma_addr_t dma_addr)
-{
-}
-
-dma_addr_t
-pci_map_single(struct pci_dev *pdev, void *cpu_addr, size_t size,
-	       int direction)
-{
-	return (dma_addr_t) 0;
-}
-
-void
-pci_unmap_single(struct pci_dev *pdev, dma_addr_t dma_addr, size_t size,
-		 int direction)
-{
-}
-
-int
-pci_map_sg(struct pci_dev *pdev, struct scatterlist *sg, int nents,
-	   int direction)
-{
-	return 0;
-}
-
-void
-pci_unmap_sg(struct pci_dev *pdev, struct scatterlist *sg, int nents,
-	     int direction)
-{
-}
-
-int
-pci_dma_supported(struct pci_dev *hwdev, dma_addr_t mask)
-{
-	return 0;
-}
-
-/* Generic DMA mapping functions: */
-
-void *
-dma_alloc_coherent(struct device *dev, size_t size,
-		   dma_addr_t *dma_handle, gfp_t gfp)
+static void *alpha_noop_alloc_coherent(struct device *dev, size_t size,
+				       dma_addr_t *dma_handle, gfp_t gfp)
 {
 	void *ret;
 
@@ -171,11 +121,22 @@ dma_alloc_coherent(struct device *dev, size_t size,
 	return ret;
 }
 
-EXPORT_SYMBOL(dma_alloc_coherent);
+static void alpha_noop_free_coherent(struct device *dev, size_t size,
+				     void *cpu_addr, dma_addr_t dma_addr)
+{
+	free_pages((unsigned long)cpu_addr, get_order(size));
+}
+
+static dma_addr_t alpha_noop_map_page(struct device *dev, struct page *page,
+				      unsigned long offset, size_t size,
+				      enum dma_data_direction dir,
+				      struct dma_attrs *attrs)
+{
+	return page_to_pa(page) + offset;
+}
 
-int
-dma_map_sg(struct device *dev, struct scatterlist *sgl, int nents,
-	   enum dma_data_direction direction)
+static int alpha_noop_map_sg(struct device *dev, struct scatterlist *sgl, int nents,
+			     enum dma_data_direction dir, struct dma_attrs *attrs)
 {
 	int i;
 	struct scatterlist *sg;
@@ -192,19 +153,37 @@ dma_map_sg(struct device *dev, struct scatterlist *sgl, int nents,
 	return nents;
 }
 
-EXPORT_SYMBOL(dma_map_sg);
+static int alpha_noop_mapping_error(struct device *dev, dma_addr_t dma_addr)
+{
+	return 0;
+}
+
+static int alpha_noop_supported(struct device *dev, u64 mask)
+{
+	return mask < 0x00ffffffUL ? 0 : 1;
+}
 
-int
-dma_set_mask(struct device *dev, u64 mask)
+static int alpha_noop_set_mask(struct device *dev, u64 mask)
 {
 	if (!dev->dma_mask || !dma_supported(dev, mask))
 		return -EIO;
 
 	*dev->dma_mask = mask;
-
 	return 0;
 }
-EXPORT_SYMBOL(dma_set_mask);
+
+struct dma_map_ops alpha_noop_ops = {
+	.alloc_coherent		= alpha_noop_alloc_coherent,
+	.free_coherent		= alpha_noop_free_coherent,
+	.map_page		= alpha_noop_map_page,
+	.map_sg			= alpha_noop_map_sg,
+	.mapping_error		= alpha_noop_mapping_error,
+	.dma_supported		= alpha_noop_supported,
+	.set_dma_mask		= alpha_noop_set_mask,
+};
+
+struct dma_map_ops *dma_ops = &alpha_noop_ops;
+EXPORT_SYMBOL(dma_ops);
 
 void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen)
 {
diff --git a/arch/alpha/kernel/pci_iommu.c b/arch/alpha/kernel/pci_iommu.c
index 8449504f5e0..ce9e54c887f 100644
--- a/arch/alpha/kernel/pci_iommu.c
+++ b/arch/alpha/kernel/pci_iommu.c
@@ -216,10 +216,30 @@ iommu_arena_free(struct pci_iommu_arena *arena, long ofs, long n)
 	for (i = 0; i < n; ++i)
 		p[i] = 0;
 }
-
-/* True if the machine supports DAC addressing, and DEV can
-   make use of it given MASK.  */
-static int pci_dac_dma_supported(struct pci_dev *hwdev, u64 mask);
+
+/*
+ * True if the machine supports DAC addressing, and DEV can
+ * make use of it given MASK.
+ */
+static int pci_dac_dma_supported(struct pci_dev *dev, u64 mask)
+{
+	dma64_addr_t dac_offset = alpha_mv.pci_dac_offset;
+	int ok = 1;
+
+	/* If this is not set, the machine doesn't support DAC at all.  */
+	if (dac_offset == 0)
+		ok = 0;
+
+	/* The device has to be able to address our DAC bit.  */
+	if ((dac_offset & dev->dma_mask) != dac_offset)
+		ok = 0;
+
+	/* If both conditions above are met, we are fine. */
+	DBGA("pci_dac_dma_supported %s from %p\n",
+	     ok ? "yes" : "no", __builtin_return_address(0));
+
+	return ok;
+}
 
 /* Map a single buffer of the indicated size for PCI DMA in streaming
    mode.  The 32-bit PCI bus mastering address to use is returned.
@@ -301,23 +321,36 @@ pci_map_single_1(struct pci_dev *pdev, void *cpu_addr, size_t size,
 	return ret;
 }
 
-dma_addr_t
-pci_map_single(struct pci_dev *pdev, void *cpu_addr, size_t size, int dir)
+/* Helper for generic DMA-mapping functions. */
+static struct pci_dev *alpha_gendev_to_pci(struct device *dev)
 {
-	int dac_allowed; 
+	if (dev && dev->bus == &pci_bus_type)
+		return to_pci_dev(dev);
 
-	if (dir == PCI_DMA_NONE)
-		BUG();
+	/* Assume that non-PCI devices asking for DMA are either ISA or EISA,
+	   BUG() otherwise. */
+	BUG_ON(!isa_bridge);
 
-	dac_allowed = pdev ? pci_dac_dma_supported(pdev, pdev->dma_mask) : 0; 
-	return pci_map_single_1(pdev, cpu_addr, size, dac_allowed);
+	/* Assume non-busmaster ISA DMA when dma_mask is not set (the ISA
+	   bridge is bus master then). */
+	if (!dev || !dev->dma_mask || !*dev->dma_mask)
+		return isa_bridge;
+
+	/* For EISA bus masters, return isa_bridge (it might have smaller
+	   dma_mask due to wiring limitations). */
+	if (*dev->dma_mask >= isa_bridge->dma_mask)
+		return isa_bridge;
+
+	/* This assumes ISA bus master with dma_mask 0xffffff. */
+	return NULL;
 }
-EXPORT_SYMBOL(pci_map_single);
 
-dma_addr_t
-pci_map_page(struct pci_dev *pdev, struct page *page, unsigned long offset,
-	     size_t size, int dir)
+static dma_addr_t alpha_pci_map_page(struct device *dev, struct page *page,
+				     unsigned long offset, size_t size,
+				     enum dma_data_direction dir,
+				     struct dma_attrs *attrs)
 {
+	struct pci_dev *pdev = alpha_gendev_to_pci(dev);
 	int dac_allowed;
 
 	if (dir == PCI_DMA_NONE)
@@ -327,7 +360,6 @@ pci_map_page(struct pci_dev *pdev, struct page *page, unsigned long offset,
 	return pci_map_single_1(pdev, (char *)page_address(page) + offset, 
 				size, dac_allowed);
 }
-EXPORT_SYMBOL(pci_map_page);
 
 /* Unmap a single streaming mode DMA translation.  The DMA_ADDR and
    SIZE must match what was provided for in a previous pci_map_single
@@ -335,16 +367,17 @@ EXPORT_SYMBOL(pci_map_page);
    the cpu to the buffer are guaranteed to see whatever the device
    wrote there.  */
 
-void
-pci_unmap_single(struct pci_dev *pdev, dma_addr_t dma_addr, size_t size,
-		 int direction)
+static void alpha_pci_unmap_page(struct device *dev, dma_addr_t dma_addr,
+				 size_t size, enum dma_data_direction dir,
+				 struct dma_attrs *attrs)
 {
 	unsigned long flags;
+	struct pci_dev *pdev = alpha_gendev_to_pci(dev);
 	struct pci_controller *hose = pdev ? pdev->sysdata : pci_isa_hose;
 	struct pci_iommu_arena *arena;
 	long dma_ofs, npages;
 
-	if (direction == PCI_DMA_NONE)
+	if (dir == PCI_DMA_NONE)
 		BUG();
 
 	if (dma_addr >= __direct_map_base
@@ -393,25 +426,16 @@ pci_unmap_single(struct pci_dev *pdev, dma_addr_t dma_addr, size_t size,
 	DBGA2("pci_unmap_single: sg [%llx,%zx] np %ld from %p\n",
 	      dma_addr, size, npages, __builtin_return_address(0));
 }
-EXPORT_SYMBOL(pci_unmap_single);
-
-void
-pci_unmap_page(struct pci_dev *pdev, dma_addr_t dma_addr,
-	       size_t size, int direction)
-{
-	pci_unmap_single(pdev, dma_addr, size, direction);
-}
-EXPORT_SYMBOL(pci_unmap_page);
 
 /* Allocate and map kernel buffer using consistent mode DMA for PCI
    device.  Returns non-NULL cpu-view pointer to the buffer if
    successful and sets *DMA_ADDRP to the pci side dma address as well,
    else DMA_ADDRP is undefined.  */
 
-void *
-__pci_alloc_consistent(struct pci_dev *pdev, size_t size,
-		       dma_addr_t *dma_addrp, gfp_t gfp)
+static void *alpha_pci_alloc_coherent(struct device *dev, size_t size,
+				      dma_addr_t *dma_addrp, gfp_t gfp)
 {
+	struct pci_dev *pdev = alpha_gendev_to_pci(dev);
 	void *cpu_addr;
 	long order = get_order(size);
 
@@ -439,13 +463,12 @@ try_again:
 		gfp |= GFP_DMA;
 		goto try_again;
 	}
-		
+
 	DBGA2("pci_alloc_consistent: %zx -> [%p,%llx] from %p\n",
 	      size, cpu_addr, *dma_addrp, __builtin_return_address(0));
 
 	return cpu_addr;
 }
-EXPORT_SYMBOL(__pci_alloc_consistent);
 
 /* Free and unmap a consistent DMA buffer.  CPU_ADDR and DMA_ADDR must
    be values that were returned from pci_alloc_consistent.  SIZE must
@@ -453,17 +476,16 @@ EXPORT_SYMBOL(__pci_alloc_consistent);
    References to the memory and mappings associated with CPU_ADDR or
    DMA_ADDR past this call are illegal.  */
 
-void
-pci_free_consistent(struct pci_dev *pdev, size_t size, void *cpu_addr,
-		    dma_addr_t dma_addr)
+static void alpha_pci_free_coherent(struct device *dev, size_t size,
+				    void *cpu_addr, dma_addr_t dma_addr)
 {
+	struct pci_dev *pdev = alpha_gendev_to_pci(dev);
 	pci_unmap_single(pdev, dma_addr, size, PCI_DMA_BIDIRECTIONAL);
 	free_pages((unsigned long)cpu_addr, get_order(size));
 
 	DBGA2("pci_free_consistent: [%llx,%zx] from %p\n",
 	      dma_addr, size, __builtin_return_address(0));
 }
-EXPORT_SYMBOL(pci_free_consistent);
 
 /* Classify the elements of the scatterlist.  Write dma_address
    of each element with:
@@ -626,23 +648,21 @@ sg_fill(struct device *dev, struct scatterlist *leader, struct scatterlist *end,
 	return 1;
 }
 
-int
-pci_map_sg(struct pci_dev *pdev, struct scatterlist *sg, int nents,
-	   int direction)
+static int alpha_pci_map_sg(struct device *dev, struct scatterlist *sg,
+			    int nents, enum dma_data_direction dir,
+			    struct dma_attrs *attrs)
 {
+	struct pci_dev *pdev = alpha_gendev_to_pci(dev);
 	struct scatterlist *start, *end, *out;
 	struct pci_controller *hose;
 	struct pci_iommu_arena *arena;
 	dma_addr_t max_dma;
 	int dac_allowed;
-	struct device *dev;
 
-	if (direction == PCI_DMA_NONE)
+	if (dir == PCI_DMA_NONE)
 		BUG();
 
-	dac_allowed = pdev ? pci_dac_dma_supported(pdev, pdev->dma_mask) : 0;
-
-	dev = pdev ? &pdev->dev : NULL;
+	dac_allowed = dev ? pci_dac_dma_supported(pdev, pdev->dma_mask) : 0;
 
 	/* Fast path single entry scatterlists.  */
 	if (nents == 1) {
@@ -699,19 +719,19 @@ pci_map_sg(struct pci_dev *pdev, struct scatterlist *sg, int nents,
 	/* Some allocation failed while mapping the scatterlist
 	   entries.  Unmap them now.  */
 	if (out > start)
-		pci_unmap_sg(pdev, start, out - start, direction);
+		pci_unmap_sg(pdev, start, out - start, dir);
 	return 0;
 }
-EXPORT_SYMBOL(pci_map_sg);
 
 /* Unmap a set of streaming mode DMA translations.  Again, cpu read
    rules concerning calls here are the same as for pci_unmap_single()
    above.  */
 
-void
-pci_unmap_sg(struct pci_dev *pdev, struct scatterlist *sg, int nents,
-	     int direction)
+static void alpha_pci_unmap_sg(struct device *dev, struct scatterlist *sg,
+			       int nents, enum dma_data_direction dir,
+			       struct dma_attrs *attrs)
 {
+	struct pci_dev *pdev = alpha_gendev_to_pci(dev);
 	unsigned long flags;
 	struct pci_controller *hose;
 	struct pci_iommu_arena *arena;
@@ -719,7 +739,7 @@ pci_unmap_sg(struct pci_dev *pdev, struct scatterlist *sg, int nents,
 	dma_addr_t max_dma;
 	dma_addr_t fbeg, fend;
 
-	if (direction == PCI_DMA_NONE)
+	if (dir == PCI_DMA_NONE)
 		BUG();
 
 	if (! alpha_mv.mv_pci_tbi)
@@ -783,15 +803,13 @@ pci_unmap_sg(struct pci_dev *pdev, struct scatterlist *sg, int nents,
 
 	DBGA("pci_unmap_sg: %ld entries\n", nents - (end - sg));
 }
-EXPORT_SYMBOL(pci_unmap_sg);
-
 
 /* Return whether the given PCI device DMA address mask can be
    supported properly.  */
 
-int
-pci_dma_supported(struct pci_dev *pdev, u64 mask)
+static int alpha_pci_supported(struct device *dev, u64 mask)
 {
+	struct pci_dev *pdev = alpha_gendev_to_pci(dev);
 	struct pci_controller *hose;
 	struct pci_iommu_arena *arena;
 
@@ -818,7 +836,6 @@ pci_dma_supported(struct pci_dev *pdev, u64 mask)
 
 	return 0;
 }
-EXPORT_SYMBOL(pci_dma_supported);
 
 
 /*
@@ -918,66 +935,32 @@ iommu_unbind(struct pci_iommu_arena *arena, long pg_start, long pg_count)
 	return 0;
 }
 
-/* True if the machine supports DAC addressing, and DEV can
-   make use of it given MASK.  */
-
-static int
-pci_dac_dma_supported(struct pci_dev *dev, u64 mask)
-{
-	dma64_addr_t dac_offset = alpha_mv.pci_dac_offset;
-	int ok = 1;
-
-	/* If this is not set, the machine doesn't support DAC at all.  */
-	if (dac_offset == 0)
-		ok = 0;
-
-	/* The device has to be able to address our DAC bit.  */
-	if ((dac_offset & dev->dma_mask) != dac_offset)
-		ok = 0;
-
-	/* If both conditions above are met, we are fine. */
-	DBGA("pci_dac_dma_supported %s from %p\n",
-	     ok ? "yes" : "no", __builtin_return_address(0));
-
-	return ok;
-}
-
-/* Helper for generic DMA-mapping functions. */
-
-struct pci_dev *
-alpha_gendev_to_pci(struct device *dev)
+static int alpha_pci_mapping_error(struct device *dev, dma_addr_t dma_addr)
 {
-	if (dev && dev->bus == &pci_bus_type)
-		return to_pci_dev(dev);
-
-	/* Assume that non-PCI devices asking for DMA are either ISA or EISA,
-	   BUG() otherwise. */
-	BUG_ON(!isa_bridge);
-
-	/* Assume non-busmaster ISA DMA when dma_mask is not set (the ISA
-	   bridge is bus master then). */
-	if (!dev || !dev->dma_mask || !*dev->dma_mask)
-		return isa_bridge;
-
-	/* For EISA bus masters, return isa_bridge (it might have smaller
-	   dma_mask due to wiring limitations). */
-	if (*dev->dma_mask >= isa_bridge->dma_mask)
-		return isa_bridge;
-
-	/* This assumes ISA bus master with dma_mask 0xffffff. */
-	return NULL;
+	return dma_addr == 0;
 }
-EXPORT_SYMBOL(alpha_gendev_to_pci);
 
-int
-dma_set_mask(struct device *dev, u64 mask)
+static int alpha_pci_set_mask(struct device *dev, u64 mask)
 {
 	if (!dev->dma_mask ||
 	    !pci_dma_supported(alpha_gendev_to_pci(dev), mask))
 		return -EIO;
 
 	*dev->dma_mask = mask;
-
 	return 0;
 }
-EXPORT_SYMBOL(dma_set_mask);
+
+struct dma_map_ops alpha_pci_ops = {
+	.alloc_coherent		= alpha_pci_alloc_coherent,
+	.free_coherent		= alpha_pci_free_coherent,
+	.map_page		= alpha_pci_map_page,
+	.unmap_page		= alpha_pci_unmap_page,
+	.map_sg			= alpha_pci_map_sg,
+	.unmap_sg		= alpha_pci_unmap_sg,
+	.mapping_error		= alpha_pci_mapping_error,
+	.dma_supported		= alpha_pci_supported,
+	.set_dma_mask		= alpha_pci_set_mask,
+};
+
+struct dma_map_ops *dma_ops = &alpha_pci_ops;
+EXPORT_SYMBOL(dma_ops);
diff --git a/arch/alpha/kernel/ptrace.c b/arch/alpha/kernel/ptrace.c
index e072041d19f..9acadc6b16a 100644
--- a/arch/alpha/kernel/ptrace.c
+++ b/arch/alpha/kernel/ptrace.c
@@ -249,6 +249,17 @@ ptrace_cancel_bpt(struct task_struct * child)
 	return (nsaved != 0);
 }
 
+void user_enable_single_step(struct task_struct *child)
+{
+	/* Mark single stepping.  */
+	task_thread_info(child)->bpt_nsaved = -1;
+}
+
+void user_disable_single_step(struct task_struct *child)
+{
+	ptrace_cancel_bpt(child);
+}
+
 /*
  * Called by kernel/ptrace.c when detaching..
  *
@@ -256,7 +267,7 @@ ptrace_cancel_bpt(struct task_struct * child)
  */
 void ptrace_disable(struct task_struct *child)
 { 
-	ptrace_cancel_bpt(child);
+	user_disable_single_step(child);
 }
 
 long arch_ptrace(struct task_struct *child, long request, long addr, long data)
@@ -295,52 +306,6 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 		DBG(DBG_MEM, ("poke $%ld<-%#lx\n", addr, data));
 		ret = put_reg(child, addr, data);
 		break;
-
-	case PTRACE_SYSCALL:
-		/* continue and stop at next (return from) syscall */
-	case PTRACE_CONT:    /* restart after signal. */
-		ret = -EIO;
-		if (!valid_signal(data))
-			break;
-		if (request == PTRACE_SYSCALL)
-			set_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
-		else
-			clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
-		child->exit_code = data;
-		/* make sure single-step breakpoint is gone. */
-		ptrace_cancel_bpt(child);
-		wake_up_process(child);
-		ret = 0;
-		break;
-
-	/*
-	 * Make the child exit.  Best I can do is send it a sigkill.
-	 * perhaps it should be put in the status that it wants to
-	 * exit.
-	 */
-	case PTRACE_KILL:
-		ret = 0;
-		if (child->exit_state == EXIT_ZOMBIE)
-			break;
-		child->exit_code = SIGKILL;
-		/* make sure single-step breakpoint is gone. */
-		ptrace_cancel_bpt(child);
-		wake_up_process(child);
-		break;
-
-	case PTRACE_SINGLESTEP:  /* execute single instruction. */
-		ret = -EIO;
-		if (!valid_signal(data))
-			break;
-		/* Mark single stepping.  */
-		task_thread_info(child)->bpt_nsaved = -1;
-		clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
-		child->exit_code = data;
-		wake_up_process(child);
-		/* give it a chance to run. */
-		ret = 0;
-		break;
-
 	default:
 		ret = ptrace_request(child, request, addr, data);
 		break;
diff --git a/arch/alpha/kernel/sys_dp264.c b/arch/alpha/kernel/sys_dp264.c
index d64e1e497e7..4026502ab70 100644
--- a/arch/alpha/kernel/sys_dp264.c
+++ b/arch/alpha/kernel/sys_dp264.c
@@ -224,7 +224,7 @@ static void
 dp264_device_interrupt(unsigned long vector)
 {
 #if 1
-	printk("dp264_device_interrupt: NOT IMPLEMENTED YET!! \n");
+	printk("dp264_device_interrupt: NOT IMPLEMENTED YET!!\n");
 #else
 	unsigned long pld;
 	unsigned int i;
diff --git a/arch/alpha/kernel/sys_titan.c b/arch/alpha/kernel/sys_titan.c
index 288053342c8..9008d0f20c5 100644
--- a/arch/alpha/kernel/sys_titan.c
+++ b/arch/alpha/kernel/sys_titan.c
@@ -171,7 +171,7 @@ titan_set_irq_affinity(unsigned int irq, const struct cpumask *affinity)
 static void
 titan_device_interrupt(unsigned long vector)
 {
-	printk("titan_device_interrupt: NOT IMPLEMENTED YET!! \n");
+	printk("titan_device_interrupt: NOT IMPLEMENTED YET!!\n");
 }
 
 static void 
diff --git a/arch/alpha/kernel/traps.c b/arch/alpha/kernel/traps.c
index 6ee7655b756..b14f015008a 100644
--- a/arch/alpha/kernel/traps.c
+++ b/arch/alpha/kernel/traps.c
@@ -17,6 +17,7 @@
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/kallsyms.h>
+#include <linux/ratelimit.h>
 
 #include <asm/gentrap.h>
 #include <asm/uaccess.h>
@@ -771,8 +772,7 @@ asmlinkage void
 do_entUnaUser(void __user * va, unsigned long opcode,
 	      unsigned long reg, struct pt_regs *regs)
 {
-	static int cnt = 0;
-	static unsigned long last_time;
+	static DEFINE_RATELIMIT_STATE(ratelimit, 5 * HZ, 5);
 
 	unsigned long tmp1, tmp2, tmp3, tmp4;
 	unsigned long fake_reg, *reg_addr = &fake_reg;
@@ -783,15 +783,11 @@ do_entUnaUser(void __user * va, unsigned long opcode,
 	   with the unaliged access.  */
 
 	if (!test_thread_flag (TIF_UAC_NOPRINT)) {
-		if (cnt >= 5 && time_after(jiffies, last_time + 5 * HZ)) {
-			cnt = 0;
-		}
-		if (++cnt < 5) {
+		if (__ratelimit(&ratelimit)) {
 			printk("%s(%d): unaligned trap at %016lx: %p %lx %ld\n",
 			       current->comm, task_pid_nr(current),
 			       regs->pc - 4, va, opcode, reg);
 		}
-		last_time = jiffies;
 	}
 	if (test_thread_flag (TIF_UAC_SIGBUS))
 		goto give_sigbus;