Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6:
  sparc32: Delete prom_stdin and prom_stdout.
  sparc32: More memory probing consolidation.
  sparc32: Kill totally unused memory information tables.
  sparc64: Fix syscall restart, for real...
  serial: Fix sparc driver name strings.
  sparc64: Stop creating dummy root PCI host controller devices.

10 files changed, 111 insertions, 360 deletions

diff --git a/arch/sparc/kernel/setup.c b/arch/sparc/kernel/setup.c
index 3c13137685da..8a55c4f0df84 100644
--- a/arch/sparc/kernel/setup.c
+++ b/arch/sparc/kernel/setup.c
@@ -180,11 +180,9 @@ static void __init boot_flags_init(char *commands)
 
 /* This routine will in the future do all the nasty prom stuff
  * to probe for the mmu type and its parameters, etc. This will
- * also be where SMP things happen plus the Sparc specific memory
- * physical memory probe as on the alpha.
+ * also be where SMP things happen.
  */
 
-extern int prom_probe_memory(void);
 extern void sun4c_probe_vac(void);
 extern char cputypval;
 extern unsigned long start, end;
@@ -268,7 +266,6 @@ void __init setup_arch(char **cmdline_p)
         if (ARCH_SUN4C_SUN4)
                 sun4c_probe_vac();
         load_mmu();
-        (void) prom_probe_memory();
 
         phys_base = 0xffffffffUL;
         highest_paddr = 0UL;
diff --git a/arch/sparc/mm/fault.c b/arch/sparc/mm/fault.c
index e4d9c8e19df5..abd50795a7b6 100644
--- a/arch/sparc/mm/fault.c
+++ b/arch/sparc/mm/fault.c
@@ -47,64 +47,15 @@ int vac_size, vac_linesize, vac_do_hw_vac_flushes;
 int vac_entries_per_context, vac_entries_per_segment;
 int vac_entries_per_page;
 
-/* Nice, simple, prom library does all the sweating for us. ;) */
-int prom_probe_memory (void)
+/* Return how much physical memory we have.  */
+unsigned long probe_memory(void)
 {
-        register struct linux_mlist_v0 *mlist;
-        register unsigned long bytes, base_paddr, tally;
-        register int i;
-
-        i = 0;
-        mlist= *prom_meminfo()->v0_available;
-        bytes = tally = mlist->num_bytes;
-        base_paddr = (unsigned long) mlist->start_adr;
-  
-        sp_banks[0].base_addr = base_paddr;
-        sp_banks[0].num_bytes = bytes;
-
-        while (mlist->theres_more != (void *) 0){
-                i++;
-                mlist = mlist->theres_more;
-                bytes = mlist->num_bytes;
-                tally += bytes;
-                if (i > SPARC_PHYS_BANKS-1) {
-                        printk ("The machine has more banks than "
-                                "this kernel can support\n"
-                                "Increase the SPARC_PHYS_BANKS "
-                                "setting (currently %d)\n",
-                                SPARC_PHYS_BANKS);
-                        i = SPARC_PHYS_BANKS-1;
-                        break;
-                }
-    
-                sp_banks[i].base_addr = (unsigned long) mlist->start_adr;
-                sp_banks[i].num_bytes = mlist->num_bytes;
-        }
-
-        i++;
-        sp_banks[i].base_addr = 0xdeadbeef;
-        sp_banks[i].num_bytes = 0;
-
-        /* Now mask all bank sizes on a page boundary, it is all we can
-         * use anyways.
-         */
-        for(i=0; sp_banks[i].num_bytes != 0; i++)
-                sp_banks[i].num_bytes &= PAGE_MASK;
-
-        return tally;
-}
-
-/* Traverse the memory lists in the prom to see how much physical we
- * have.
- */
-unsigned long
-probe_memory(void)
-{
-        int total;
+        unsigned long total = 0;
+        int i;
 
-        total = prom_probe_memory();
+        for (i = 0; sp_banks[i].num_bytes; i++)
+                total += sp_banks[i].num_bytes;
 
-        /* Oh man, much nicer, keep the dirt in promlib. */
         return total;
 }
 
diff --git a/arch/sparc/prom/init.c b/arch/sparc/prom/init.c
index 50abfb1b880e..2fa3a474e3a2 100644
--- a/arch/sparc/prom/init.c
+++ b/arch/sparc/prom/init.c
@@ -21,8 +21,6 @@ linux_sun4_romvec *sun4_romvec;
 /* The root node of the prom device tree. */
 int prom_root_node;
 
-int prom_stdin, prom_stdout;
-
 /* Pointer to the device tree operations structure. */
 struct linux_nodeops *prom_nodeops;
 
@@ -74,11 +72,6 @@ void __init prom_init(struct linux_romvec *rp)
            (((unsigned long) prom_nodeops) == -1))
                 prom_halt();
 
-        if(prom_vers == PROM_V2 || prom_vers == PROM_V3) {
-                prom_stdout = *romvec->pv_v2bootargs.fd_stdout;
-                prom_stdin  = *romvec->pv_v2bootargs.fd_stdin;
-        }
-        
         prom_meminit();
 
         prom_ranges_init();
diff --git a/arch/sparc/prom/memory.c b/arch/sparc/prom/memory.c
index b0c0f9c4fc14..947f047dc95a 100644
--- a/arch/sparc/prom/memory.c
+++ b/arch/sparc/prom/memory.c
@@ -1,215 +1,100 @@
-/* $Id: memory.c,v 1.15 2000/01/29 01:09:12 anton Exp $
- * memory.c: Prom routine for acquiring various bits of information
+/* memory.c: Prom routine for acquiring various bits of information
  *           about RAM on the machine, both virtual and physical.
  *
- * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
+ * Copyright (C) 1995, 2008 David S. Miller (davem@davemloft.net)
  * Copyright (C) 1997 Michael A. Griffith (grif@acm.org)
  */
 
 #include <linux/kernel.h>
+#include <linux/sort.h>
 #include <linux/init.h>
 
 #include <asm/openprom.h>
 #include <asm/sun4prom.h>
 #include <asm/oplib.h>
+#include <asm/page.h>
 
-/* This routine, for consistency, returns the ram parameters in the
- * V0 prom memory descriptor format.  I choose this format because I
- * think it was the easiest to work with.  I feel the religious
- * arguments now... ;)  Also, I return the linked lists sorted to
- * prevent paging_init() upset stomach as I have not yet written
- * the pepto-bismol kernel module yet.
- */
+static int __init prom_meminit_v0(void)
+{
+        struct linux_mlist_v0 *p;
+        int index;
+
+        index = 0;
+        for (p = *(romvec->pv_v0mem.v0_available); p; p = p->theres_more) {
+                sp_banks[index].base_addr = (unsigned long) p->start_adr;
+                sp_banks[index].num_bytes = p->num_bytes;
+                index++;
+        }
 
-struct linux_prom_registers prom_reg_memlist[64];
-struct linux_prom_registers prom_reg_tmp[64];
+        return index;
+}
 
-struct linux_mlist_v0 prom_phys_total[64];
-struct linux_mlist_v0 prom_prom_taken[64];
-struct linux_mlist_v0 prom_phys_avail[64];
+static int __init prom_meminit_v2(void)
+{
+        struct linux_prom_registers reg[64];
+        int node, size, num_ents, i;
 
-struct linux_mlist_v0 *prom_ptot_ptr = prom_phys_total;
-struct linux_mlist_v0 *prom_ptak_ptr = prom_prom_taken;
-struct linux_mlist_v0 *prom_pavl_ptr = prom_phys_avail;
+        node = prom_searchsiblings(prom_getchild(prom_root_node), "memory");
+        size = prom_getproperty(node, "available", (char *) reg, sizeof(reg));
+        num_ents = size / sizeof(struct linux_prom_registers);
 
-struct linux_mem_v0 prom_memlist;
+        for (i = 0; i < num_ents; i++) {
+                sp_banks[i].base_addr = reg[i].phys_addr;
+                sp_banks[i].num_bytes = reg[i].reg_size;
+        }
 
+        return num_ents;
+}
 
-/* Internal Prom library routine to sort a linux_mlist_v0 memory
- * list.  Used below in initialization.
- */
-static void __init
-prom_sortmemlist(struct linux_mlist_v0 *thislist)
+static int __init prom_meminit_sun4(void)
 {
-        int swapi = 0;
-        int i, mitr, tmpsize;
-        char *tmpaddr;
-        char *lowest;
-
-        for(i=0; thislist[i].theres_more; i++) {
-                lowest = thislist[i].start_adr;
-                for(mitr = i+1; thislist[mitr-1].theres_more; mitr++)
-                        if(thislist[mitr].start_adr < lowest) {
-                                lowest = thislist[mitr].start_adr;
-                                swapi = mitr;
-                        }
-                if(lowest == thislist[i].start_adr) continue;
-                tmpaddr = thislist[swapi].start_adr;
-                tmpsize = thislist[swapi].num_bytes;
-                for(mitr = swapi; mitr > i; mitr--) {
-                        thislist[mitr].start_adr = thislist[mitr-1].start_adr;
-                        thislist[mitr].num_bytes = thislist[mitr-1].num_bytes;
-                }
-                thislist[i].start_adr = tmpaddr;
-                thislist[i].num_bytes = tmpsize;
-        }
+#ifdef CONFIG_SUN4
+        sp_banks[0].base_addr = 0;
+        sp_banks[0].num_bytes = *(sun4_romvec->memoryavail);
+#endif
+        return 1;
+}
+
+static int sp_banks_cmp(const void *a, const void *b)
+{
+        const struct sparc_phys_banks *x = a, *y = b;
 
-        return;
+        if (x->base_addr > y->base_addr)
+                return 1;
+        if (x->base_addr < y->base_addr)
+                return -1;
+        return 0;
 }
 
 /* Initialize the memory lists based upon the prom version. */
 void __init prom_meminit(void)
 {
-        int node = 0;
-        unsigned int iter, num_regs;
-        struct linux_mlist_v0 *mptr;  /* ptr for traversal */
+        int i, num_ents = 0;
 
-        switch(prom_vers) {
+        switch (prom_vers) {
         case PROM_V0:
-                /* Nice, kind of easier to do in this case. */
-                /* First, the total physical descriptors. */
-                for(mptr = (*(romvec->pv_v0mem.v0_totphys)), iter=0;
-                    mptr; mptr=mptr->theres_more, iter++) {
-                        prom_phys_total[iter].start_adr = mptr->start_adr;
-                        prom_phys_total[iter].num_bytes = mptr->num_bytes;
-                        prom_phys_total[iter].theres_more = &prom_phys_total[iter+1];
-                }
-                prom_phys_total[iter-1].theres_more = NULL;
-                /* Second, the total prom taken descriptors. */
-                for(mptr = (*(romvec->pv_v0mem.v0_prommap)), iter=0;
-                    mptr; mptr=mptr->theres_more, iter++) {
-                        prom_prom_taken[iter].start_adr = mptr->start_adr;
-                        prom_prom_taken[iter].num_bytes = mptr->num_bytes;
-                        prom_prom_taken[iter].theres_more = &prom_prom_taken[iter+1];
-                }
-                prom_prom_taken[iter-1].theres_more = NULL;
-                /* Last, the available physical descriptors. */
-                for(mptr = (*(romvec->pv_v0mem.v0_available)), iter=0;
-                    mptr; mptr=mptr->theres_more, iter++) {
-                        prom_phys_avail[iter].start_adr = mptr->start_adr;
-                        prom_phys_avail[iter].num_bytes = mptr->num_bytes;
-                        prom_phys_avail[iter].theres_more = &prom_phys_avail[iter+1];
-                }
-                prom_phys_avail[iter-1].theres_more = NULL;
-                /* Sort all the lists. */
-                prom_sortmemlist(prom_phys_total);
-                prom_sortmemlist(prom_prom_taken);
-                prom_sortmemlist(prom_phys_avail);
+                num_ents = prom_meminit_v0();
                 break;
+
         case PROM_V2:
         case PROM_V3:
-                /* Grrr, have to traverse the prom device tree ;( */
-                node = prom_getchild(prom_root_node);
-                node = prom_searchsiblings(node, "memory");
-                num_regs = prom_getproperty(node, "available",
-                                            (char *) prom_reg_memlist,
-                                            sizeof(prom_reg_memlist));
-                num_regs = (num_regs/sizeof(struct linux_prom_registers));
-                for(iter=0; iter<num_regs; iter++) {
-                        prom_phys_avail[iter].start_adr =
-                                (char *) prom_reg_memlist[iter].phys_addr;
-                        prom_phys_avail[iter].num_bytes =
-                                (unsigned long) prom_reg_memlist[iter].reg_size;
-                        prom_phys_avail[iter].theres_more =
-                                &prom_phys_avail[iter+1];
-                }
-                prom_phys_avail[iter-1].theres_more = NULL;
-
-                num_regs = prom_getproperty(node, "reg",
-                                            (char *) prom_reg_memlist,
-                                            sizeof(prom_reg_memlist));
-                num_regs = (num_regs/sizeof(struct linux_prom_registers));
-                for(iter=0; iter<num_regs; iter++) {
-                        prom_phys_total[iter].start_adr =
-                                (char *) prom_reg_memlist[iter].phys_addr;
-                        prom_phys_total[iter].num_bytes =
-                                (unsigned long) prom_reg_memlist[iter].reg_size;
-                        prom_phys_total[iter].theres_more =
-                                &prom_phys_total[iter+1];
-                }
-                prom_phys_total[iter-1].theres_more = NULL;
-
-                node = prom_getchild(prom_root_node);
-                node = prom_searchsiblings(node, "virtual-memory");
-                num_regs = prom_getproperty(node, "available",
-                                            (char *) prom_reg_memlist,
-                                            sizeof(prom_reg_memlist));
-                num_regs = (num_regs/sizeof(struct linux_prom_registers));
-
-                /* Convert available virtual areas to taken virtual
-                 * areas.  First sort, then convert.
-                 */
-                for(iter=0; iter<num_regs; iter++) {
-                        prom_prom_taken[iter].start_adr =
-                                (char *) prom_reg_memlist[iter].phys_addr;
-                        prom_prom_taken[iter].num_bytes =
-                                (unsigned long) prom_reg_memlist[iter].reg_size;
-                        prom_prom_taken[iter].theres_more =
-                                &prom_prom_taken[iter+1];
-                }
-                prom_prom_taken[iter-1].theres_more = NULL;
-
-                prom_sortmemlist(prom_prom_taken);
-
-                /* Finally, convert. */
-                for(iter=0; iter<num_regs; iter++) {
-                        prom_prom_taken[iter].start_adr =
-                                prom_prom_taken[iter].start_adr +
-                                        prom_prom_taken[iter].num_bytes;
-                        prom_prom_taken[iter].num_bytes =
-                                prom_prom_taken[iter+1].start_adr -
-                                        prom_prom_taken[iter].start_adr;
-                }
-                prom_prom_taken[iter-1].num_bytes =
-                        0xffffffff - (unsigned long) prom_prom_taken[iter-1].start_adr;
-
-                /* Sort the other two lists. */
-                prom_sortmemlist(prom_phys_total);
-                prom_sortmemlist(prom_phys_avail);
+                num_ents = prom_meminit_v2();
                 break;
 
         case PROM_SUN4:
-#ifdef CONFIG_SUN4      
-                /* how simple :) */
-                prom_phys_total[0].start_adr = NULL;
-                prom_phys_total[0].num_bytes = *(sun4_romvec->memorysize);
-                prom_phys_total[0].theres_more = NULL;
-                prom_prom_taken[0].start_adr = NULL; 
-                prom_prom_taken[0].num_bytes = 0x0;
-                prom_prom_taken[0].theres_more = NULL;
-                prom_phys_avail[0].start_adr = NULL;
-                prom_phys_avail[0].num_bytes = *(sun4_romvec->memoryavail);
-                prom_phys_avail[0].theres_more = NULL;
-#endif
+                num_ents = prom_meminit_sun4();
                 break;
 
         default:
                 break;
-        };
-
-        /* Link all the lists into the top-level descriptor. */
-        prom_memlist.v0_totphys=&prom_ptot_ptr;
-        prom_memlist.v0_prommap=&prom_ptak_ptr;
-        prom_memlist.v0_available=&prom_pavl_ptr;
+        }
+        sort(sp_banks, num_ents, sizeof(struct sparc_phys_banks),
+             sp_banks_cmp, NULL);
 
-        return;
-}
+        /* Sentinel.  */
+        sp_banks[num_ents].base_addr = 0xdeadbeef;
+        sp_banks[num_ents].num_bytes = 0;
 
-/* This returns a pointer to our libraries internal v0 format
- * memory descriptor.
- */
-struct linux_mem_v0 *
-prom_meminfo(void)
-{
-        return &prom_memlist;
+        for (i = 0; i < num_ents; i++)
+                sp_banks[i].num_bytes &= PAGE_MASK;
 }
diff --git a/arch/sparc64/kernel/pci.c b/arch/sparc64/kernel/pci.c
index dbf2fc2f4d87..112b09f16f36 100644
--- a/arch/sparc64/kernel/pci.c
+++ b/arch/sparc64/kernel/pci.c
@@ -350,8 +350,7 @@ static void pci_parse_of_addrs(struct of_device *op,
 
 struct pci_dev *of_create_pci_dev(struct pci_pbm_info *pbm,
                                   struct device_node *node,
-                                  struct pci_bus *bus, int devfn,
-                                  int host_controller)
+                                  struct pci_bus *bus, int devfn)
 {
         struct dev_archdata *sd;
         struct pci_dev *dev;
@@ -390,43 +389,28 @@ struct pci_dev *of_create_pci_dev(struct pci_pbm_info *pbm,
         dev->devfn = devfn;
         dev->multifunction = 0;         /* maybe a lie? */
 
-        if (host_controller) {
-                if (tlb_type != hypervisor) {
-                        pci_read_config_word(dev, PCI_VENDOR_ID,
-                                             &dev->vendor);
-                        pci_read_config_word(dev, PCI_DEVICE_ID,
-                                             &dev->device);
-                } else {
-                        dev->vendor = PCI_VENDOR_ID_SUN;
-                        dev->device = 0x80f0;
-                }
-                dev->cfg_size = 256;
-                dev->class = PCI_CLASS_BRIDGE_HOST << 8;
-                sprintf(pci_name(dev), "%04x:%02x:%02x.%d", pci_domain_nr(bus),
-                        0x00, PCI_SLOT(devfn), PCI_FUNC(devfn));
-        } else {
-                dev->vendor = of_getintprop_default(node, "vendor-id", 0xffff);
-                dev->device = of_getintprop_default(node, "device-id", 0xffff);
-                dev->subsystem_vendor =
-                        of_getintprop_default(node, "subsystem-vendor-id", 0);
-                dev->subsystem_device =
-                        of_getintprop_default(node, "subsystem-id", 0);
-
-                dev->cfg_size = pci_cfg_space_size(dev);
-
-                /* We can't actually use the firmware value, we have
-                 * to read what is in the register right now.  One
-                 * reason is that in the case of IDE interfaces the
-                 * firmware can sample the value before the the IDE
-                 * interface is programmed into native mode.
-                 */
-                pci_read_config_dword(dev, PCI_CLASS_REVISION, &class);
-                dev->class = class >> 8;
-                dev->revision = class & 0xff;
+        dev->vendor = of_getintprop_default(node, "vendor-id", 0xffff);
+        dev->device = of_getintprop_default(node, "device-id", 0xffff);
+        dev->subsystem_vendor =
+                of_getintprop_default(node, "subsystem-vendor-id", 0);
+        dev->subsystem_device =
+                of_getintprop_default(node, "subsystem-id", 0);
+
+        dev->cfg_size = pci_cfg_space_size(dev);
+
+        /* We can't actually use the firmware value, we have
+         * to read what is in the register right now.  One
+         * reason is that in the case of IDE interfaces the
+         * firmware can sample the value before the the IDE
+         * interface is programmed into native mode.
+         */
+        pci_read_config_dword(dev, PCI_CLASS_REVISION, &class);
+        dev->class = class >> 8;
+        dev->revision = class & 0xff;
+
+        sprintf(pci_name(dev), "%04x:%02x:%02x.%d", pci_domain_nr(bus),
+                dev->bus->number, PCI_SLOT(devfn), PCI_FUNC(devfn));
 
-                sprintf(pci_name(dev), "%04x:%02x:%02x.%d", pci_domain_nr(bus),
-                        dev->bus->number, PCI_SLOT(devfn), PCI_FUNC(devfn));
-        }
         if (ofpci_verbose)
                 printk("    class: 0x%x device name: %s\n",
                        dev->class, pci_name(dev));
@@ -441,26 +425,21 @@ struct pci_dev *of_create_pci_dev(struct pci_pbm_info *pbm,
         dev->current_state = 4;         /* unknown power state */
         dev->error_state = pci_channel_io_normal;
 
-        if (host_controller) {
+        if (!strcmp(type, "pci") || !strcmp(type, "pciex")) {
+                /* a PCI-PCI bridge */
                 dev->hdr_type = PCI_HEADER_TYPE_BRIDGE;
                 dev->rom_base_reg = PCI_ROM_ADDRESS1;
-                dev->irq = PCI_IRQ_NONE;
+        } else if (!strcmp(type, "cardbus")) {
+                dev->hdr_type = PCI_HEADER_TYPE_CARDBUS;
         } else {
-                if (!strcmp(type, "pci") || !strcmp(type, "pciex")) {
-                        /* a PCI-PCI bridge */
-                        dev->hdr_type = PCI_HEADER_TYPE_BRIDGE;
-                        dev->rom_base_reg = PCI_ROM_ADDRESS1;
-                } else if (!strcmp(type, "cardbus")) {
-                        dev->hdr_type = PCI_HEADER_TYPE_CARDBUS;
-                } else {
-                        dev->hdr_type = PCI_HEADER_TYPE_NORMAL;
-                        dev->rom_base_reg = PCI_ROM_ADDRESS;
+                dev->hdr_type = PCI_HEADER_TYPE_NORMAL;
+                dev->rom_base_reg = PCI_ROM_ADDRESS;
 
-                        dev->irq = sd->op->irqs[0];
-                        if (dev->irq == 0xffffffff)
-                                dev->irq = PCI_IRQ_NONE;
-                }
+                dev->irq = sd->op->irqs[0];
+                if (dev->irq == 0xffffffff)
+                        dev->irq = PCI_IRQ_NONE;
         }
+
         pci_parse_of_addrs(sd->op, node, dev);
 
         if (ofpci_verbose)
@@ -749,7 +728,7 @@ static void __devinit pci_of_scan_bus(struct pci_pbm_info *pbm,
                 prev_devfn = devfn;
 
                 /* create a new pci_dev for this device */
-                dev = of_create_pci_dev(pbm, child, bus, devfn, 0);
+                dev = of_create_pci_dev(pbm, child, bus, devfn);
                 if (!dev)
                         continue;
                 if (ofpci_verbose)
@@ -796,48 +775,9 @@ static void __devinit pci_bus_register_of_sysfs(struct pci_bus *bus)
                 pci_bus_register_of_sysfs(child_bus);
 }
 
-int pci_host_bridge_read_pci_cfg(struct pci_bus *bus_dev,
-                                 unsigned int devfn,
-                                 int where, int size,
-                                 u32 *value)
-{
-        static u8 fake_pci_config[] = {
-                0x8e, 0x10, /* Vendor: 0x108e (Sun) */
-                0xf0, 0x80, /* Device: 0x80f0 (Fire) */
-                0x46, 0x01, /* Command: 0x0146 (SERR, PARITY, MASTER, MEM) */
-                0xa0, 0x22, /* Status: 0x02a0 (DEVSEL_MED, FB2B, 66MHZ) */
-                0x00, 0x00, 0x00, 0x06, /* Class: 0x06000000 host bridge */
-                0x00, /* Cacheline: 0x00 */
-                0x40, /* Latency: 0x40 */
-                0x00, /* Header-Type: 0x00 normal */
-        };
-
-        *value = 0;
-        if (where >= 0 && where < sizeof(fake_pci_config) &&
-            (where + size) >= 0 &&
-            (where + size) < sizeof(fake_pci_config) &&
-            size <= sizeof(u32)) {
-                while (size--) {
-                        *value <<= 8;
-                        *value |= fake_pci_config[where + size];
-                }
-        }
-
-        return PCIBIOS_SUCCESSFUL;
-}
-
-int pci_host_bridge_write_pci_cfg(struct pci_bus *bus_dev,
-                                  unsigned int devfn,
-                                  int where, int size,
-                                  u32 value)
-{
-        return PCIBIOS_SUCCESSFUL;
-}
-
 struct pci_bus * __devinit pci_scan_one_pbm(struct pci_pbm_info *pbm)
 {
         struct device_node *node = pbm->prom_node;
-        struct pci_dev *host_pdev;
         struct pci_bus *bus;
 
         printk("PCI: Scanning PBM %s\n", node->full_name);
@@ -855,10 +795,6 @@ struct pci_bus * __devinit pci_scan_one_pbm(struct pci_pbm_info *pbm)
         bus->resource[0] = &pbm->io_space;
         bus->resource[1] = &pbm->mem_space;
 
-        /* Create the dummy host bridge and link it in.  */
-        host_pdev = of_create_pci_dev(pbm, node, bus, 0x00, 1);
-        bus->self = host_pdev;
-
         pci_of_scan_bus(pbm, node, bus);
         pci_bus_add_devices(bus);
         pci_bus_register_of_sysfs(bus);
diff --git a/arch/sparc64/kernel/pci_common.c b/arch/sparc64/kernel/pci_common.c
index 923e0bcc3bfd..19fa621d6a60 100644
--- a/arch/sparc64/kernel/pci_common.c
+++ b/arch/sparc64/kernel/pci_common.c
@@ -264,9 +264,6 @@ static int sun4v_read_pci_cfg(struct pci_bus *bus_dev, unsigned int devfn,
         unsigned int func = PCI_FUNC(devfn);
         unsigned long ret;
 
-        if (!bus && devfn == 0x00)
-                return pci_host_bridge_read_pci_cfg(bus_dev, devfn, where,
-                                                    size, value);
         if (config_out_of_range(pbm, bus, devfn, where)) {
                 ret = ~0UL;
         } else {
@@ -300,9 +297,6 @@ static int sun4v_write_pci_cfg(struct pci_bus *bus_dev, unsigned int devfn,
         unsigned int func = PCI_FUNC(devfn);
         unsigned long ret;
 
-        if (!bus && devfn == 0x00)
-                return pci_host_bridge_write_pci_cfg(bus_dev, devfn, where,
-                                                     size, value);
         if (config_out_of_range(pbm, bus, devfn, where)) {
                 /* Do nothing. */
         } else {
diff --git a/arch/sparc64/kernel/pci_impl.h b/arch/sparc64/kernel/pci_impl.h
index 218bac4ff79b..c385d126be11 100644
--- a/arch/sparc64/kernel/pci_impl.h
+++ b/arch/sparc64/kernel/pci_impl.h
@@ -167,15 +167,6 @@ extern void pci_get_pbm_props(struct pci_pbm_info *pbm);
 extern struct pci_bus *pci_scan_one_pbm(struct pci_pbm_info *pbm);
 extern void pci_determine_mem_io_space(struct pci_pbm_info *pbm);
 
-extern int pci_host_bridge_read_pci_cfg(struct pci_bus *bus_dev,
-                                        unsigned int devfn,
-                                        int where, int size,
-                                        u32 *value);
-extern int pci_host_bridge_write_pci_cfg(struct pci_bus *bus_dev,
-                                         unsigned int devfn,
-                                         int where, int size,
-                                         u32 value);
-
 /* Error reporting support. */
 extern void pci_scan_for_target_abort(struct pci_pbm_info *, struct pci_bus *);
 extern void pci_scan_for_master_abort(struct pci_pbm_info *, struct pci_bus *);
diff --git a/arch/sparc64/kernel/process.c b/arch/sparc64/kernel/process.c
index 056013749157..500ac6d483a0 100644
--- a/arch/sparc64/kernel/process.c
+++ b/arch/sparc64/kernel/process.c
@@ -591,12 +591,6 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long sp,
         if (clone_flags & CLONE_SETTLS)
                 t->kregs->u_regs[UREG_G7] = regs->u_regs[UREG_I3];
 
-        /* We do not want to accidently trigger system call restart
-         * handling in the new thread.  Therefore, clear out the trap
-         * type, which will make pt_regs_regs_is_syscall() return false.
-         */
-        pt_regs_clear_trap_type(t->kregs);
-
         return 0;
 }
 
diff --git a/arch/sparc64/kernel/signal.c b/arch/sparc64/kernel/signal.c
index f2d88d8f7a42..45d6bf632daa 100644
--- a/arch/sparc64/kernel/signal.c
+++ b/arch/sparc64/kernel/signal.c
@@ -332,6 +332,9 @@ void do_rt_sigreturn(struct pt_regs *regs)
         regs->tpc = tpc;
         regs->tnpc = tnpc;
 
+        /* Prevent syscall restart.  */
+        pt_regs_clear_trap_type(regs);
+
         sigdelsetmask(&set, ~_BLOCKABLE);
         spin_lock_irq(&current->sighand->siglock);
         current->blocked = set;
@@ -515,7 +518,8 @@ static void do_signal(struct pt_regs *regs, unsigned long orig_i0)
         siginfo_t info;
         int signr;
         
-        if (pt_regs_is_syscall(regs)) {
+        if (pt_regs_is_syscall(regs) &&
+            (regs->tstate & (TSTATE_XCARRY | TSTATE_ICARRY))) {
                 pt_regs_clear_trap_type(regs);
                 cookie.restart_syscall = 1;
         } else
diff --git a/arch/sparc64/kernel/signal32.c b/arch/sparc64/kernel/signal32.c
index 91f8d0826db1..9415d2c918c5 100644
--- a/arch/sparc64/kernel/signal32.c
+++ b/arch/sparc64/kernel/signal32.c
@@ -268,6 +268,9 @@ void do_sigreturn32(struct pt_regs *regs)
         regs->tstate &= ~(TSTATE_ICC|TSTATE_XCC);
         regs->tstate |= psr_to_tstate_icc(psr);
 
+        /* Prevent syscall restart.  */
+        pt_regs_clear_trap_type(regs);
+
         err |= __get_user(fpu_save, &sf->fpu_save);
         if (fpu_save)
                 err |= restore_fpu_state32(regs, &sf->fpu_state);
@@ -351,6 +354,9 @@ asmlinkage void do_rt_sigreturn32(struct pt_regs *regs)
         regs->tstate &= ~(TSTATE_ICC|TSTATE_XCC);
         regs->tstate |= psr_to_tstate_icc(psr);
 
+        /* Prevent syscall restart.  */
+        pt_regs_clear_trap_type(regs);
+
         err |= __get_user(fpu_save, &sf->fpu_save);
         if (fpu_save)
                 err |= restore_fpu_state32(regs, &sf->fpu_state);