19 files changed, 542 insertions, 106 deletions

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 5e1083829d82..2bf2f3f53029 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -42,6 +42,9 @@ config GENERIC_HARDIRQS
         bool
         default y
 
+config ARCH_SETS_UP_PER_CPU_AREA
+        def_bool PPC64
+
 config IRQ_PER_CPU
         bool
         default y
@@ -53,6 +56,11 @@ config RWSEM_XCHGADD_ALGORITHM
         bool
         default y
 
+config GENERIC_LOCKBREAK
+        bool
+        default y
+        depends on SMP && PREEMPT
+
 config ARCH_HAS_ILOG2_U32
         bool
         default y
diff --git a/arch/powerpc/boot/Makefile b/arch/powerpc/boot/Makefile
index 7f6b07c30d69..122a27078998 100644
--- a/arch/powerpc/boot/Makefile
+++ b/arch/powerpc/boot/Makefile
@@ -72,7 +72,7 @@ obj-wlib := $(addsuffix .o, $(basename $(addprefix $(obj)/, $(src-wlib))))
 obj-plat := $(addsuffix .o, $(basename $(addprefix $(obj)/, $(src-plat))))
 
 quiet_cmd_copy_zlib = COPY    $@
-      cmd_copy_zlib = sed "s@__attribute_used__@@;s@<linux/\([^>]*\).*@\"\1\"@" $< > $@
+      cmd_copy_zlib = sed "s@__used@@;s@<linux/\([^>]*\).*@\"\1\"@" $< > $@
 
 quiet_cmd_copy_zlibheader = COPY    $@
       cmd_copy_zlibheader = sed "s@<linux/\([^>]*\).*@\"\1\"@" $< > $@
diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c
index 3e17d154d0d4..8b056d2295cc 100644
--- a/arch/powerpc/kernel/ptrace.c
+++ b/arch/powerpc/kernel/ptrace.c
@@ -256,7 +256,7 @@ static int set_evrregs(struct task_struct *task, unsigned long *data)
 #endif /* CONFIG_SPE */
 
 
-static void set_single_step(struct task_struct *task)
+void user_enable_single_step(struct task_struct *task)
 {
         struct pt_regs *regs = task->thread.regs;
 
@@ -271,7 +271,7 @@ static void set_single_step(struct task_struct *task)
         set_tsk_thread_flag(task, TIF_SINGLESTEP);
 }
 
-static void clear_single_step(struct task_struct *task)
+void user_disable_single_step(struct task_struct *task)
 {
         struct pt_regs *regs = task->thread.regs;
 
@@ -313,7 +313,7 @@ static int ptrace_set_debugreg(struct task_struct *task, unsigned long addr,
 void ptrace_disable(struct task_struct *child)
 {
         /* make sure the single step bit is not set. */
-        clear_single_step(child);
+        user_disable_single_step(child);
 }
 
 /*
@@ -445,52 +445,6 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long 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 the single step bit is not set. */
-                clear_single_step(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)   /* already dead */
-                        break;
-                child->exit_code = SIGKILL;
-                /* make sure the single step bit is not set. */
-                clear_single_step(child);
-                wake_up_process(child);
-                break;
-        }
-
-        case PTRACE_SINGLESTEP: {  /* set the trap flag. */
-                ret = -EIO;
-                if (!valid_signal(data))
-                        break;
-                clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
-                set_single_step(child);
-                child->exit_code = data;
-                /* give it a chance to run. */
-                wake_up_process(child);
-                ret = 0;
-                break;
-        }
-
         case PTRACE_GET_DEBUGREG: {
                 ret = -EINVAL;
                 /* We only support one DABR and no IABRS at the moment */
diff --git a/arch/powerpc/kernel/sysfs.c b/arch/powerpc/kernel/sysfs.c
index 25d9a96484dd..c8127f832df0 100644
--- a/arch/powerpc/kernel/sysfs.c
+++ b/arch/powerpc/kernel/sysfs.c
@@ -158,7 +158,7 @@ static ssize_t show_##NAME(struct sys_device *dev, char *buf) \
         unsigned long val = run_on_cpu(cpu->sysdev.id, read_##NAME, 0); \
         return sprintf(buf, "%lx\n", val); \
 } \
-static ssize_t __attribute_used__ \
+static ssize_t __used \
         store_##NAME(struct sys_device *dev, const char *buf, size_t count) \
 { \
         struct cpu *cpu = container_of(dev, struct cpu, sysdev); \
diff --git a/arch/powerpc/kernel/vio.c b/arch/powerpc/kernel/vio.c
index 19a5656001c0..f0bad7070fb5 100644
--- a/arch/powerpc/kernel/vio.c
+++ b/arch/powerpc/kernel/vio.c
@@ -37,8 +37,6 @@
 #include <asm/iseries/hv_call_xm.h>
 #include <asm/iseries/iommu.h>
 
-extern struct kset devices_subsys; /* needed for vio_find_name() */
-
 static struct bus_type vio_bus_type;
 
 static struct vio_dev vio_bus_device  = { /* fake "parent" device */
@@ -361,19 +359,16 @@ EXPORT_SYMBOL(vio_get_attribute);
 #ifdef CONFIG_PPC_PSERIES
 /* vio_find_name() - internal because only vio.c knows how we formatted the
  * kobject name
- * XXX once vio_bus_type.devices is actually used as a kset in
- * drivers/base/bus.c, this function should be removed in favor of
- * "device_find(kobj_name, &vio_bus_type)"
  */
-static struct vio_dev *vio_find_name(const char *kobj_name)
+static struct vio_dev *vio_find_name(const char *name)
 {
-        struct kobject *found;
+        struct device *found;
 
-        found = kset_find_obj(&devices_subsys, kobj_name);
+        found = bus_find_device_by_name(&vio_bus_type, NULL, name);
         if (!found)
                 return NULL;
 
-        return to_vio_dev(container_of(found, struct device, kobj));
+        return to_vio_dev(found);
 }
 
 /**
diff --git a/arch/powerpc/kernel/vmlinux.lds.S b/arch/powerpc/kernel/vmlinux.lds.S
index f66fa5d966b0..0afb9e31d2a0 100644
--- a/arch/powerpc/kernel/vmlinux.lds.S
+++ b/arch/powerpc/kernel/vmlinux.lds.S
@@ -23,7 +23,7 @@ SECTIONS
         /* Sections to be discarded. */
         /DISCARD/ : {
         *(.exitcall.exit)
-        *(.exit.data)
+        EXIT_DATA
         }
 
         . = KERNELBASE;
@@ -76,17 +76,19 @@ SECTIONS
 
         .init.text : {
                 _sinittext = .;
-                *(.init.text)
+                INIT_TEXT
                 _einittext = .;
         }
 
         /* .exit.text is discarded at runtime, not link time,
          * to deal with references from __bug_table
          */
-        .exit.text : { *(.exit.text) }
+        .exit.text : {
+                EXIT_TEXT
+        }
 
         .init.data : {
-                *(.init.data);
+                INIT_DATA
                 __vtop_table_begin = .;
                 *(.vtop_fixup);
                 __vtop_table_end = .;
diff --git a/arch/powerpc/oprofile/op_model_power4.c b/arch/powerpc/oprofile/op_model_power4.c
index cddc250a6a5c..446a8bbb847b 100644
--- a/arch/powerpc/oprofile/op_model_power4.c
+++ b/arch/powerpc/oprofile/op_model_power4.c
@@ -172,15 +172,15 @@ static void power4_stop(void)
 }
 
 /* Fake functions used by canonicalize_pc */
-static void __attribute_used__ hypervisor_bucket(void)
+static void __used hypervisor_bucket(void)
 {
 }
 
-static void __attribute_used__ rtas_bucket(void)
+static void __used rtas_bucket(void)
 {
 }
 
-static void __attribute_used__ kernel_unknown_bucket(void)
+static void __used kernel_unknown_bucket(void)
 {
 }
 
diff --git a/arch/powerpc/platforms/cell/spu_base.c b/arch/powerpc/platforms/cell/spu_base.c
index fb266ae32095..e45cfa84911f 100644
--- a/arch/powerpc/platforms/cell/spu_base.c
+++ b/arch/powerpc/platforms/cell/spu_base.c
@@ -511,7 +511,7 @@ static int spu_shutdown(struct sys_device *sysdev)
 }
 
 static struct sysdev_class spu_sysdev_class = {
-        set_kset_name("spu"),
+        .name = "spu",
         .shutdown = spu_shutdown,
 };
 
diff --git a/arch/powerpc/platforms/pasemi/Makefile b/arch/powerpc/platforms/pasemi/Makefile
index 2cd2a4f26a48..8f52d7515793 100644
--- a/arch/powerpc/platforms/pasemi/Makefile
+++ b/arch/powerpc/platforms/pasemi/Makefile
@@ -1,3 +1,3 @@
-obj-y   += setup.o pci.o time.o idle.o powersave.o iommu.o
+obj-y   += setup.o pci.o time.o idle.o powersave.o iommu.o dma_lib.o
 obj-$(CONFIG_PPC_PASEMI_MDIO)   += gpio_mdio.o
 obj-$(CONFIG_PPC_PASEMI_CPUFREQ) += cpufreq.o
diff --git a/arch/powerpc/platforms/pasemi/dma_lib.c b/arch/powerpc/platforms/pasemi/dma_lib.c
new file mode 100644
index 000000000000..c529d8dff395
--- /dev/null
+++ b/arch/powerpc/platforms/pasemi/dma_lib.c
@@ -0,0 +1,488 @@
+/*
+ * Copyright (C) 2006-2007 PA Semi, Inc
+ *
+ * Common functions for DMA access on PA Semi PWRficient
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/of.h>
+
+#include <asm/pasemi_dma.h>
+
+#define MAX_TXCH 64
+#define MAX_RXCH 64
+
+static struct pasdma_status *dma_status;
+
+static void __iomem *iob_regs;
+static void __iomem *mac_regs[6];
+static void __iomem *dma_regs;
+
+static int base_hw_irq;
+
+static int num_txch, num_rxch;
+
+static struct pci_dev *dma_pdev;
+
+/* Bitmaps to handle allocation of channels */
+
+static DECLARE_BITMAP(txch_free, MAX_TXCH);
+static DECLARE_BITMAP(rxch_free, MAX_RXCH);
+
+/* pasemi_read_iob_reg - read IOB register
+ * @reg: Register to read (offset into PCI CFG space)
+ */
+unsigned int pasemi_read_iob_reg(unsigned int reg)
+{
+        return in_le32(iob_regs+reg);
+}
+EXPORT_SYMBOL(pasemi_read_iob_reg);
+
+/* pasemi_write_iob_reg - write IOB register
+ * @reg: Register to write to (offset into PCI CFG space)
+ * @val: Value to write
+ */
+void pasemi_write_iob_reg(unsigned int reg, unsigned int val)
+{
+        out_le32(iob_regs+reg, val);
+}
+EXPORT_SYMBOL(pasemi_write_iob_reg);
+
+/* pasemi_read_mac_reg - read MAC register
+ * @intf: MAC interface
+ * @reg: Register to read (offset into PCI CFG space)
+ */
+unsigned int pasemi_read_mac_reg(int intf, unsigned int reg)
+{
+        return in_le32(mac_regs[intf]+reg);
+}
+EXPORT_SYMBOL(pasemi_read_mac_reg);
+
+/* pasemi_write_mac_reg - write MAC register
+ * @intf: MAC interface
+ * @reg: Register to write to (offset into PCI CFG space)
+ * @val: Value to write
+ */
+void pasemi_write_mac_reg(int intf, unsigned int reg, unsigned int val)
+{
+        out_le32(mac_regs[intf]+reg, val);
+}
+EXPORT_SYMBOL(pasemi_write_mac_reg);
+
+/* pasemi_read_dma_reg - read DMA register
+ * @reg: Register to read (offset into PCI CFG space)
+ */
+unsigned int pasemi_read_dma_reg(unsigned int reg)
+{
+        return in_le32(dma_regs+reg);
+}
+EXPORT_SYMBOL(pasemi_read_dma_reg);
+
+/* pasemi_write_dma_reg - write DMA register
+ * @reg: Register to write to (offset into PCI CFG space)
+ * @val: Value to write
+ */
+void pasemi_write_dma_reg(unsigned int reg, unsigned int val)
+{
+        out_le32(dma_regs+reg, val);
+}
+EXPORT_SYMBOL(pasemi_write_dma_reg);
+
+static int pasemi_alloc_tx_chan(enum pasemi_dmachan_type type)
+{
+        int bit;
+        int start, limit;
+
+        switch (type & (TXCHAN_EVT0|TXCHAN_EVT1)) {
+        case TXCHAN_EVT0:
+                start = 0;
+                limit = 10;
+                break;
+        case TXCHAN_EVT1:
+                start = 10;
+                limit = MAX_TXCH;
+                break;
+        default:
+                start = 0;
+                limit = MAX_TXCH;
+                break;
+        }
+retry:
+        bit = find_next_bit(txch_free, MAX_TXCH, start);
+        if (bit >= limit)
+                return -ENOSPC;
+        if (!test_and_clear_bit(bit, txch_free))
+                goto retry;
+
+        return bit;
+}
+
+static void pasemi_free_tx_chan(int chan)
+{
+        BUG_ON(test_bit(chan, txch_free));
+        set_bit(chan, txch_free);
+}
+
+static int pasemi_alloc_rx_chan(void)
+{
+        int bit;
+retry:
+        bit = find_first_bit(rxch_free, MAX_RXCH);
+        if (bit >= MAX_TXCH)
+                return -ENOSPC;
+        if (!test_and_clear_bit(bit, rxch_free))
+                goto retry;
+
+        return bit;
+}
+
+static void pasemi_free_rx_chan(int chan)
+{
+        BUG_ON(test_bit(chan, rxch_free));
+        set_bit(chan, rxch_free);
+}
+
+/* pasemi_dma_alloc_chan - Allocate a DMA channel
+ * @type: Type of channel to allocate
+ * @total_size: Total size of structure to allocate (to allow for more
+ *              room behind the structure to be used by the client)
+ * @offset: Offset in bytes from start of the total structure to the beginning
+ *          of struct pasemi_dmachan. Needed when struct pasemi_dmachan is
+ *          not the first member of the client structure.
+ *
+ * pasemi_dma_alloc_chan allocates a DMA channel for use by a client. The
+ * type argument specifies whether it's a RX or TX channel, and in the case
+ * of TX channels which group it needs to belong to (if any).
+ *
+ * Returns a pointer to the total structure allocated on success, NULL
+ * on failure.
+ */
+void *pasemi_dma_alloc_chan(enum pasemi_dmachan_type type,
+                            int total_size, int offset)
+{
+        void *buf;
+        struct pasemi_dmachan *chan;
+        int chno;
+
+        BUG_ON(total_size < sizeof(struct pasemi_dmachan));
+
+        buf = kzalloc(total_size, GFP_KERNEL);
+
+        if (!buf)
+                return NULL;
+        chan = buf + offset;
+
+        chan->priv = buf;
+
+        switch (type & (TXCHAN|RXCHAN)) {
+        case RXCHAN:
+                chno = pasemi_alloc_rx_chan();
+                chan->chno = chno;
+                chan->irq = irq_create_mapping(NULL,
+                                               base_hw_irq + num_txch + chno);
+                chan->status = &dma_status->rx_sta[chno];
+                break;
+        case TXCHAN:
+                chno = pasemi_alloc_tx_chan(type);
+                chan->chno = chno;
+                chan->irq = irq_create_mapping(NULL, base_hw_irq + chno);
+                chan->status = &dma_status->tx_sta[chno];
+                break;
+        }
+
+        chan->chan_type = type;
+
+        return chan;
+}
+EXPORT_SYMBOL(pasemi_dma_alloc_chan);
+
+/* pasemi_dma_free_chan - Free a previously allocated channel
+ * @chan: Channel to free
+ *
+ * Frees a previously allocated channel. It will also deallocate any
+ * descriptor ring associated with the channel, if allocated.
+ */
+void pasemi_dma_free_chan(struct pasemi_dmachan *chan)
+{
+        if (chan->ring_virt)
+                pasemi_dma_free_ring(chan);
+
+        switch (chan->chan_type & (RXCHAN|TXCHAN)) {
+        case RXCHAN:
+                pasemi_free_rx_chan(chan->chno);
+                break;
+        case TXCHAN:
+                pasemi_free_tx_chan(chan->chno);
+                break;
+        }
+
+        kfree(chan->priv);
+}
+EXPORT_SYMBOL(pasemi_dma_free_chan);
+
+/* pasemi_dma_alloc_ring - Allocate descriptor ring for a channel
+ * @chan: Channel for which to allocate
+ * @ring_size: Ring size in 64-bit (8-byte) words
+ *
+ * Allocate a descriptor ring for a channel. Returns 0 on success, errno
+ * on failure. The passed in struct pasemi_dmachan is updated with the
+ * virtual and DMA addresses of the ring.
+ */
+int pasemi_dma_alloc_ring(struct pasemi_dmachan *chan, int ring_size)
+{
+        BUG_ON(chan->ring_virt);
+
+        chan->ring_size = ring_size;
+
+        chan->ring_virt = dma_alloc_coherent(&dma_pdev->dev,
+                                             ring_size * sizeof(u64),
+                                             &chan->ring_dma, GFP_KERNEL);
+
+        if (!chan->ring_virt)
+                return -ENOMEM;
+
+        memset(chan->ring_virt, 0, ring_size * sizeof(u64));
+
+        return 0;
+}
+EXPORT_SYMBOL(pasemi_dma_alloc_ring);
+
+/* pasemi_dma_free_ring - Free an allocated descriptor ring for a channel
+ * @chan: Channel for which to free the descriptor ring
+ *
+ * Frees a previously allocated descriptor ring for a channel.
+ */
+void pasemi_dma_free_ring(struct pasemi_dmachan *chan)
+{
+        BUG_ON(!chan->ring_virt);
+
+        dma_free_coherent(&dma_pdev->dev, chan->ring_size * sizeof(u64),
+                          chan->ring_virt, chan->ring_dma);
+        chan->ring_virt = NULL;
+        chan->ring_size = 0;
+        chan->ring_dma = 0;
+}
+EXPORT_SYMBOL(pasemi_dma_free_ring);
+
+/* pasemi_dma_start_chan - Start a DMA channel
+ * @chan: Channel to start
+ * @cmdsta: Additional CCMDSTA/TCMDSTA bits to write
+ *
+ * Enables (starts) a DMA channel with optional additional arguments.
+ */
+void pasemi_dma_start_chan(const struct pasemi_dmachan *chan, const u32 cmdsta)
+{
+        if (chan->chan_type == RXCHAN)
+                pasemi_write_dma_reg(PAS_DMA_RXCHAN_CCMDSTA(chan->chno),
+                                     cmdsta | PAS_DMA_RXCHAN_CCMDSTA_EN);
+        else
+                pasemi_write_dma_reg(PAS_DMA_TXCHAN_TCMDSTA(chan->chno),
+                                     cmdsta | PAS_DMA_TXCHAN_TCMDSTA_EN);
+}
+EXPORT_SYMBOL(pasemi_dma_start_chan);
+
+/* pasemi_dma_stop_chan - Stop a DMA channel
+ * @chan: Channel to stop
+ *
+ * Stops (disables) a DMA channel. This is done by setting the ST bit in the
+ * CMDSTA register and waiting on the ACT (active) bit to clear, then
+ * finally disabling the whole channel.
+ *
+ * This function will only try for a short while for the channel to stop, if
+ * it doesn't it will return failure.
+ *
+ * Returns 1 on success, 0 on failure.
+ */
+#define MAX_RETRIES 5000
+int pasemi_dma_stop_chan(const struct pasemi_dmachan *chan)
+{
+        int reg, retries;
+        u32 sta;
+
+        if (chan->chan_type == RXCHAN) {
+                reg = PAS_DMA_RXCHAN_CCMDSTA(chan->chno);
+                pasemi_write_dma_reg(reg, PAS_DMA_RXCHAN_CCMDSTA_ST);
+                for (retries = 0; retries < MAX_RETRIES; retries++) {
+                        sta = pasemi_read_dma_reg(reg);
+                        if (!(sta & PAS_DMA_RXCHAN_CCMDSTA_ACT)) {
+                                pasemi_write_dma_reg(reg, 0);
+                                return 1;
+                        }
+                        cond_resched();
+                }
+        } else {
+                reg = PAS_DMA_TXCHAN_TCMDSTA(chan->chno);
+                pasemi_write_dma_reg(reg, PAS_DMA_TXCHAN_TCMDSTA_ST);
+                for (retries = 0; retries < MAX_RETRIES; retries++) {
+                        sta = pasemi_read_dma_reg(reg);
+                        if (!(sta & PAS_DMA_TXCHAN_TCMDSTA_ACT)) {
+                                pasemi_write_dma_reg(reg, 0);
+                                return 1;
+                        }
+                        cond_resched();
+                }
+        }
+
+        return 0;
+}
+EXPORT_SYMBOL(pasemi_dma_stop_chan);
+
+/* pasemi_dma_alloc_buf - Allocate a buffer to use for DMA
+ * @chan: Channel to allocate for
+ * @size: Size of buffer in bytes
+ * @handle: DMA handle
+ *
+ * Allocate a buffer to be used by the DMA engine for read/write,
+ * similar to dma_alloc_coherent().
+ *
+ * Returns the virtual address of the buffer, or NULL in case of failure.
+ */
+void *pasemi_dma_alloc_buf(struct pasemi_dmachan *chan, int size,
+                           dma_addr_t *handle)
+{
+        return dma_alloc_coherent(&dma_pdev->dev, size, handle, GFP_KERNEL);
+}
+EXPORT_SYMBOL(pasemi_dma_alloc_buf);
+
+/* pasemi_dma_free_buf - Free a buffer used for DMA
+ * @chan: Channel the buffer was allocated for
+ * @size: Size of buffer in bytes
+ * @handle: DMA handle
+ *
+ * Frees a previously allocated buffer.
+ */
+void pasemi_dma_free_buf(struct pasemi_dmachan *chan, int size,
+                         dma_addr_t *handle)
+{
+        dma_free_coherent(&dma_pdev->dev, size, handle, GFP_KERNEL);
+}
+EXPORT_SYMBOL(pasemi_dma_free_buf);
+
+static void *map_onedev(struct pci_dev *p, int index)
+{
+        struct device_node *dn;
+        void __iomem *ret;
+
+        dn = pci_device_to_OF_node(p);
+        if (!dn)
+                goto fallback;
+
+        ret = of_iomap(dn, index);
+        if (!ret)
+                goto fallback;
+
+        return ret;
+fallback:
+        /* This is hardcoded and ugly, but we have some firmware versions
+         * that don't provide the register space in the device tree. Luckily
+         * they are at well-known locations so we can just do the math here.
+         */
+        return ioremap(0xe0000000 + (p->devfn << 12), 0x2000);
+}
+
+/* pasemi_dma_init - Initialize the PA Semi DMA library
+ *
+ * This function initializes the DMA library. It must be called before
+ * any other function in the library.
+ *
+ * Returns 0 on success, errno on failure.
+ */
+int pasemi_dma_init(void)
+{
+        static spinlock_t init_lock = SPIN_LOCK_UNLOCKED;
+        struct pci_dev *iob_pdev;
+        struct pci_dev *pdev;
+        struct resource res;
+        struct device_node *dn;
+        int i, intf, err = 0;
+        u32 tmp;
+
+        if (!machine_is(pasemi))
+                return -ENODEV;
+
+        spin_lock(&init_lock);
+
+        /* Make sure we haven't already initialized */
+        if (dma_pdev)
+                goto out;
+
+        iob_pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa001, NULL);
+        if (!iob_pdev) {
+                BUG();
+                printk(KERN_WARNING "Can't find I/O Bridge\n");
+                err = -ENODEV;
+                goto out;
+        }
+        iob_regs = map_onedev(iob_pdev, 0);
+
+        dma_pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa007, NULL);
+        if (!dma_pdev) {
+                BUG();
+                printk(KERN_WARNING "Can't find DMA controller\n");
+                err = -ENODEV;
+                goto out;
+        }
+        dma_regs = map_onedev(dma_pdev, 0);
+        base_hw_irq = virq_to_hw(dma_pdev->irq);
+
+        pci_read_config_dword(dma_pdev, PAS_DMA_CAP_TXCH, &tmp);
+        num_txch = (tmp & PAS_DMA_CAP_TXCH_TCHN_M) >> PAS_DMA_CAP_TXCH_TCHN_S;
+
+        pci_read_config_dword(dma_pdev, PAS_DMA_CAP_RXCH, &tmp);
+        num_rxch = (tmp & PAS_DMA_CAP_RXCH_RCHN_M) >> PAS_DMA_CAP_RXCH_RCHN_S;
+
+        intf = 0;
+        for (pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa006, NULL);
+             pdev;
+             pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa006, pdev))
+                mac_regs[intf++] = map_onedev(pdev, 0);
+
+        pci_dev_put(pdev);
+
+        for (pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa005, NULL);
+             pdev;
+             pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa005, pdev))
+                mac_regs[intf++] = map_onedev(pdev, 0);
+
+        pci_dev_put(pdev);
+
+        dn = pci_device_to_OF_node(iob_pdev);
+        if (dn)
+                err = of_address_to_resource(dn, 1, &res);
+        if (!dn || err) {
+                /* Fallback for old firmware */
+                res.start = 0xfd800000;
+                res.end = res.start + 0x1000;
+        }
+        dma_status = __ioremap(res.start, res.end-res.start, 0);
+        pci_dev_put(iob_pdev);
+
+        for (i = 0; i < MAX_TXCH; i++)
+                __set_bit(i, txch_free);
+
+        for (i = 0; i < MAX_RXCH; i++)
+                __set_bit(i, rxch_free);
+
+        printk(KERN_INFO "PA Semi PWRficient DMA library initialized "
+                "(%d tx, %d rx channels)\n", num_txch, num_rxch);
+
+out:
+        spin_unlock(&init_lock);
+        return err;
+}
+EXPORT_SYMBOL(pasemi_dma_init);
diff --git a/arch/powerpc/platforms/pasemi/pasemi.h b/arch/powerpc/platforms/pasemi/pasemi.h
index c96127b029b6..b1e524f7489d 100644
--- a/arch/powerpc/platforms/pasemi/pasemi.h
+++ b/arch/powerpc/platforms/pasemi/pasemi.h
@@ -9,6 +9,7 @@ extern void __devinit pas_pci_dma_dev_setup(struct pci_dev *dev);
 extern void __iomem *pasemi_pci_getcfgaddr(struct pci_dev *dev, int offset);
 
 extern void __init alloc_iobmap_l2(void);
+extern void __init pasemi_map_registers(void);
 
 /* Power savings modes, implemented in asm */
 extern void idle_spin(void);
diff --git a/arch/powerpc/platforms/powermac/pic.c b/arch/powerpc/platforms/powermac/pic.c
index cd7216437416..40736400ef80 100644
--- a/arch/powerpc/platforms/powermac/pic.c
+++ b/arch/powerpc/platforms/powermac/pic.c
@@ -663,7 +663,7 @@ static int pmacpic_resume(struct sys_device *sysdev)
 #endif /* CONFIG_PM && CONFIG_PPC32 */
 
 static struct sysdev_class pmacpic_sysclass = {
-        set_kset_name("pmac_pic"),
+        .name = "pmac_pic",
 };
 
 static struct sys_device device_pmacpic = {
diff --git a/arch/powerpc/platforms/pseries/hotplug-cpu.c b/arch/powerpc/platforms/pseries/hotplug-cpu.c
index 412e6b42986f..c4ad54e0f288 100644
--- a/arch/powerpc/platforms/pseries/hotplug-cpu.c
+++ b/arch/powerpc/platforms/pseries/hotplug-cpu.c
@@ -153,7 +153,7 @@ static int pseries_add_processor(struct device_node *np)
         for (i = 0; i < nthreads; i++)
                 cpu_set(i, tmp);
 
-        lock_cpu_hotplug();
+        cpu_maps_update_begin();
 
         BUG_ON(!cpus_subset(cpu_present_map, cpu_possible_map));
 
@@ -190,7 +190,7 @@ static int pseries_add_processor(struct device_node *np)
         }
         err = 0;
 out_unlock:
-        unlock_cpu_hotplug();
+        cpu_maps_update_done();
         return err;
 }
 
@@ -211,7 +211,7 @@ static void pseries_remove_processor(struct device_node *np)
 
         nthreads = len / sizeof(u32);
 
-        lock_cpu_hotplug();
+        cpu_maps_update_begin();
         for (i = 0; i < nthreads; i++) {
                 for_each_present_cpu(cpu) {
                         if (get_hard_smp_processor_id(cpu) != intserv[i])
@@ -225,7 +225,7 @@ static void pseries_remove_processor(struct device_node *np)
                         printk(KERN_WARNING "Could not find cpu to remove "
                                "with physical id 0x%x\n", intserv[i]);
         }
-        unlock_cpu_hotplug();
+        cpu_maps_update_done();
 }
 
 static int pseries_smp_notifier(struct notifier_block *nb,
diff --git a/arch/powerpc/platforms/pseries/power.c b/arch/powerpc/platforms/pseries/power.c
index 73e69023d90a..e95fc1594c84 100644
--- a/arch/powerpc/platforms/pseries/power.c
+++ b/arch/powerpc/platforms/pseries/power.c
@@ -28,13 +28,15 @@
 
 unsigned long rtas_poweron_auto; /* default and normal state is 0 */
 
-static ssize_t auto_poweron_show(struct kset *kset, char *buf)
+static ssize_t auto_poweron_show(struct kobject *kobj,
+                                 struct kobj_attribute *attr, char *buf)
 {
         return sprintf(buf, "%lu\n", rtas_poweron_auto);
 }
 
-static ssize_t
-auto_poweron_store(struct kset *kset, const char *buf, size_t n)
+static ssize_t auto_poweron_store(struct kobject *kobj,
+                                  struct kobj_attribute *attr,
+                                  const char *buf, size_t n)
 {
         int ret;
         unsigned long ups_restart;
@@ -47,17 +49,11 @@ auto_poweron_store(struct kset *kset, const char *buf, size_t n)
         return -EINVAL;
 }
 
-static struct subsys_attribute auto_poweron_attr = {
-        .attr   = {
-                .name = __stringify(auto_poweron),
-                .mode = 0644,
-        },
-        .show   = auto_poweron_show,
-        .store  = auto_poweron_store,
-};
+static struct kobj_attribute auto_poweron_attr =
+        __ATTR(auto_poweron, 0644, auto_poweron_show, auto_poweron_store);
 
 #ifndef CONFIG_PM
-decl_subsys(power,NULL,NULL);
+struct kobject *power_kobj;
 
 static struct attribute *g[] = {
         &auto_poweron_attr.attr,
@@ -70,18 +66,16 @@ static struct attribute_group attr_group = {
 
 static int __init pm_init(void)
 {
-        int error = subsystem_register(&power_subsys);
-        if (!error)
-                error = sysfs_create_group(&power_subsys.kobj, &attr_group);
-        return error;
+        power_kobj = kobject_create_and_add("power", NULL);
+        if (!power_kobj)
+                return -ENOMEM;
+        return sysfs_create_group(power_kobj, &attr_group);
 }
 core_initcall(pm_init);
 #else
-extern struct kset power_subsys;
-
 static int __init apo_pm_init(void)
 {
-        return (subsys_create_file(&power_subsys, &auto_poweron_attr));
+        return (sysfs_create_file(power_kobj, &auto_poweron_attr));
 }
 __initcall(apo_pm_init);
 #endif
diff --git a/arch/powerpc/platforms/pseries/rtasd.c b/arch/powerpc/platforms/pseries/rtasd.c
index 73401c820110..e3078ce41518 100644
--- a/arch/powerpc/platforms/pseries/rtasd.c
+++ b/arch/powerpc/platforms/pseries/rtasd.c
@@ -382,7 +382,7 @@ static void do_event_scan_all_cpus(long delay)
 {
         int cpu;
 
-        lock_cpu_hotplug();
+        get_online_cpus();
         cpu = first_cpu(cpu_online_map);
         for (;;) {
                 set_cpus_allowed(current, cpumask_of_cpu(cpu));
@@ -390,15 +390,15 @@ static void do_event_scan_all_cpus(long delay)
                 set_cpus_allowed(current, CPU_MASK_ALL);
 
                 /* Drop hotplug lock, and sleep for the specified delay */
-                unlock_cpu_hotplug();
+                put_online_cpus();
                 msleep_interruptible(delay);
-                lock_cpu_hotplug();
+                get_online_cpus();
 
                 cpu = next_cpu(cpu, cpu_online_map);
                 if (cpu == NR_CPUS)
                         break;
         }
-        unlock_cpu_hotplug();
+        put_online_cpus();
 }
 
 static int rtasd(void *unused)
diff --git a/arch/powerpc/sysdev/ipic.c b/arch/powerpc/sysdev/ipic.c
index d7f6a70e78df..ae0dbf4c1d66 100644
--- a/arch/powerpc/sysdev/ipic.c
+++ b/arch/powerpc/sysdev/ipic.c
@@ -894,7 +894,7 @@ unsigned int ipic_get_irq(void)
 }
 
 static struct sysdev_class ipic_sysclass = {
-        set_kset_name("ipic"),
+        .name = "ipic",
 };
 
 static struct sys_device device_ipic = {
diff --git a/arch/powerpc/sysdev/mpic.c b/arch/powerpc/sysdev/mpic.c
index 0da7069c7c62..6ffdda244bb1 100644
--- a/arch/powerpc/sysdev/mpic.c
+++ b/arch/powerpc/sysdev/mpic.c
@@ -1628,7 +1628,7 @@ static struct sysdev_class mpic_sysclass = {
         .resume = mpic_resume,
         .suspend = mpic_suspend,
 #endif
-        set_kset_name("mpic"),
+        .name = "mpic",
 };
 
 static int mpic_init_sys(void)
diff --git a/arch/powerpc/sysdev/mv64x60_dev.c b/arch/powerpc/sysdev/mv64x60_dev.c
index 304056cafb1e..efda0028909d 100644
--- a/arch/powerpc/sysdev/mv64x60_dev.c
+++ b/arch/powerpc/sysdev/mv64x60_dev.c
@@ -361,12 +361,6 @@ static int __init mv64x60_i2c_device_setup(struct device_node *np, int id)
         else
                 pdata.timeout = 1000;   /* 1 second */
 
-        prop = of_get_property(np, "retries", NULL);
-        if (prop)
-                pdata.retries = *prop;
-        else
-                pdata.retries = 1;
-
         pdev = platform_device_alloc(MV64XXX_I2C_CTLR_NAME, id);
         if (!pdev)
                 return -ENOMEM;
diff --git a/arch/powerpc/sysdev/qe_lib/qe_ic.c b/arch/powerpc/sysdev/qe_lib/qe_ic.c
index e1c0fd6dbc1a..f59444d3be75 100644
--- a/arch/powerpc/sysdev/qe_lib/qe_ic.c
+++ b/arch/powerpc/sysdev/qe_lib/qe_ic.c
@@ -483,7 +483,7 @@ int qe_ic_set_high_priority(unsigned int virq, unsigned int priority, int high)
 }
 
 static struct sysdev_class qe_ic_sysclass = {
-        set_kset_name("qe_ic"),
+        .name = "qe_ic",
 };
 
 static struct sys_device device_qe_ic = {