10 files changed, 55 insertions, 30 deletions

diff --git a/include/linux/device.h b/include/linux/device.h
index f6e72a65a3f2..e8e53b9accc6 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -200,6 +200,7 @@ extern int class_device_create_file(struct class_device *,
  * @node: for internal use by the driver core only.
  * @kobj: for internal use by the driver core only.
  * @devt_attr: for internal use by the driver core only.
+ * @groups: optional additional groups to be created
  * @dev: if set, a symlink to the struct device is created in the sysfs
  * directory for this struct class device.
  * @class_data: pointer to whatever you want to store here for this struct
@@ -228,6 +229,7 @@ struct class_device {
         struct device           * dev;          /* not necessary, but nice to have */
         void                    * class_data;   /* class-specific data */
         struct class_device     *parent;        /* parent of this child device, if there is one */
+        struct attribute_group  ** groups;      /* optional groups */
 
         void    (*release)(struct class_device *dev);
         int     (*uevent)(struct class_device *dev, char **envp,
diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
index ff61817082fa..635690cf3e3d 100644
--- a/include/linux/dma-mapping.h
+++ b/include/linux/dma-mapping.h
@@ -14,6 +14,7 @@ enum dma_data_direction {
 };
 
 #define DMA_64BIT_MASK  0xffffffffffffffffULL
+#define DMA_48BIT_MASK  0x0000ffffffffffffULL
 #define DMA_40BIT_MASK  0x000000ffffffffffULL
 #define DMA_39BIT_MASK  0x0000007fffffffffULL
 #define DMA_32BIT_MASK  0x00000000ffffffffULL
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index e1bd0842f6a1..f4fc576ed4c4 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -124,6 +124,7 @@ extern int get_option(char **str, int *pint);
 extern char *get_options(const char *str, int nints, int *ints);
 extern unsigned long long memparse(char *ptr, char **retptr);
 
+extern int core_kernel_text(unsigned long addr);
 extern int __kernel_text_address(unsigned long addr);
 extern int kernel_text_address(unsigned long addr);
 extern int session_of_pgrp(int pgrp);
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 01db7b88a2b1..f4169bbb60eb 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -433,8 +433,7 @@ struct net_device
 
         /* register/unregister state machine */
         enum { NETREG_UNINITIALIZED=0,
-               NETREG_REGISTERING,      /* called register_netdevice */
-               NETREG_REGISTERED,       /* completed register todo */
+               NETREG_REGISTERED,       /* completed register_netdevice */
                NETREG_UNREGISTERING,    /* called unregister_netdevice */
                NETREG_UNREGISTERED,     /* completed unregister todo */
                NETREG_RELEASED,         /* called free_netdev */
@@ -506,6 +505,8 @@ struct net_device
 
         /* class/net/name entry */
         struct class_device     class_dev;
+        /* space for optional statistics and wireless sysfs groups */
+        struct attribute_group  *sysfs_groups[3];
 };
 
 #define NETDEV_ALIGN            32
@@ -829,21 +830,19 @@ static inline void netif_rx_schedule(struct net_device *dev)
                 __netif_rx_schedule(dev);
 }
 
-
-static inline void  __netif_rx_reschedule(struct net_device *dev, int undo)
-{
-        dev->quota += undo;
-        list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list);
-        __raise_softirq_irqoff(NET_RX_SOFTIRQ);
-}
-
-/* Try to reschedule poll. Called by dev->poll() after netif_rx_complete(). */
+/* Try to reschedule poll. Called by dev->poll() after netif_rx_complete().
+ * Do not inline this?
+ */
 static inline int netif_rx_reschedule(struct net_device *dev, int undo)
 {
         if (netif_rx_schedule_prep(dev)) {
                 unsigned long flags;
+
+                dev->quota += undo;
+
                 local_irq_save(flags);
-                __netif_rx_reschedule(dev, undo);
+                list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list);
+                __raise_softirq_irqoff(NET_RX_SOFTIRQ);
                 local_irq_restore(flags);
                 return 1;
         }
diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h
index 5673008b61e1..970284f571a6 100644
--- a/include/linux/rcupdate.h
+++ b/include/linux/rcupdate.h
@@ -132,6 +132,7 @@ static inline void rcu_bh_qsctr_inc(int cpu)
 }
 
 extern int rcu_pending(int cpu);
+extern int rcu_needs_cpu(int cpu);
 
 /**
  * rcu_read_lock - mark the beginning of an RCU read-side critical section.
diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
index c32e60e79dea..bd14858121ea 100644
--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -254,6 +254,7 @@ struct uart_port {
 #define UPF_CONS_FLOW           ((__force upf_t) (1 << 23))
 #define UPF_SHARE_IRQ           ((__force upf_t) (1 << 24))
 #define UPF_BOOT_AUTOCONF       ((__force upf_t) (1 << 28))
+#define UPF_DEAD                ((__force upf_t) (1 << 30))
 #define UPF_IOREMAP             ((__force upf_t) (1 << 31))
 
 #define UPF_CHANGE_MASK         ((__force upf_t) (0x17fff))
diff --git a/include/linux/slab.h b/include/linux/slab.h
index 3af03b19c983..2d985d59c7b8 100644
--- a/include/linux/slab.h
+++ b/include/linux/slab.h
@@ -150,6 +150,7 @@ static inline void *kcalloc(size_t n, size_t size, gfp_t flags)
 
 extern void kfree(const void *);
 extern unsigned int ksize(const void *);
+extern int slab_is_available(void);
 
 #ifdef CONFIG_NUMA
 extern void *kmem_cache_alloc_node(kmem_cache_t *, gfp_t flags, int node);
diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h
index b05f1463a267..e928c0dcc297 100644
--- a/include/linux/spi/spi.h
+++ b/include/linux/spi/spi.h
@@ -31,18 +31,23 @@ extern struct bus_type spi_bus_type;
  * @master: SPI controller used with the device.
  * @max_speed_hz: Maximum clock rate to be used with this chip
  *      (on this board); may be changed by the device's driver.
+ *      The spi_transfer.speed_hz can override this for each transfer.
  * @chip-select: Chipselect, distinguishing chips handled by "master".
  * @mode: The spi mode defines how data is clocked out and in.
  *      This may be changed by the device's driver.
+ *      The "active low" default for chipselect mode can be overridden,
+ *      as can the "MSB first" default for each word in a transfer.
  * @bits_per_word: Data transfers involve one or more words; word sizes
- *      like eight or 12 bits are common.  In-memory wordsizes are
+ *      like eight or 12 bits are common.  In-memory wordsizes are
  *      powers of two bytes (e.g. 20 bit samples use 32 bits).
- *      This may be changed by the device's driver.
+ *      This may be changed by the device's driver, or left at the
+ *      default (0) indicating protocol words are eight bit bytes.
+ *      The spi_transfer.bits_per_word can override this for each transfer.
  * @irq: Negative, or the number passed to request_irq() to receive
- *      interrupts from this device.
+ *      interrupts from this device.
  * @controller_state: Controller's runtime state
  * @controller_data: Board-specific definitions for controller, such as
- *      FIFO initialization parameters; from board_info.controller_data
+ *      FIFO initialization parameters; from board_info.controller_data
  *
  * An spi_device is used to interchange data between an SPI slave
  * (usually a discrete chip) and CPU memory.
@@ -65,6 +70,7 @@ struct spi_device {
 #define SPI_MODE_2      (SPI_CPOL|0)
 #define SPI_MODE_3      (SPI_CPOL|SPI_CPHA)
 #define SPI_CS_HIGH     0x04                    /* chipselect active high? */
+#define SPI_LSB_FIRST   0x08                    /* per-word bits-on-wire */
         u8                      bits_per_word;
         int                     irq;
         void                    *controller_state;
@@ -73,7 +79,6 @@ struct spi_device {
 
         // likely need more hooks for more protocol options affecting how
         // the controller talks to each chip, like:
-        //  - bit order (default is wordwise msb-first)
         //  - memory packing (12 bit samples into low bits, others zeroed)
         //  - priority
         //  - drop chipselect after each word
@@ -143,13 +148,13 @@ static inline void spi_unregister_driver(struct spi_driver *sdrv)
  * struct spi_master - interface to SPI master controller
  * @cdev: class interface to this driver
  * @bus_num: board-specific (and often SOC-specific) identifier for a
- *      given SPI controller.
+ *      given SPI controller.
  * @num_chipselect: chipselects are used to distinguish individual
- *      SPI slaves, and are numbered from zero to num_chipselects.
- *      each slave has a chipselect signal, but it's common that not
- *      every chipselect is connected to a slave.
+ *      SPI slaves, and are numbered from zero to num_chipselects.
+ *      each slave has a chipselect signal, but it's common that not
+ *      every chipselect is connected to a slave.
  * @setup: updates the device mode and clocking records used by a
- *      device's SPI controller; protocol code may call this.
+ *      device's SPI controller; protocol code may call this.
  * @transfer: adds a message to the controller's transfer queue.
  * @cleanup: frees controller-specific state
  *
@@ -167,13 +172,13 @@ static inline void spi_unregister_driver(struct spi_driver *sdrv)
 struct spi_master {
         struct class_device     cdev;
 
-        /* other than zero (== assign one dynamically), bus_num is fully
+        /* other than negative (== assign one dynamically), bus_num is fully
          * board-specific.  usually that simplifies to being SOC-specific.
-         * example:  one SOC has three SPI controllers, numbered 1..3,
+         * example:  one SOC has three SPI controllers, numbered 0..2,
          * and one board's schematics might show it using SPI-2.  software
          * would normally use bus_num=2 for that controller.
          */
-        u16                     bus_num;
+        s16                     bus_num;
 
         /* chipselects will be integral to many controllers; some others
          * might use board-specific GPIOs.
@@ -268,10 +273,14 @@ extern struct spi_master *spi_busnum_to_master(u16 busnum);
  * @tx_dma: DMA address of tx_buf, if spi_message.is_dma_mapped
  * @rx_dma: DMA address of rx_buf, if spi_message.is_dma_mapped
  * @len: size of rx and tx buffers (in bytes)
+ * @speed_hz: Select a speed other then the device default for this
+ *      transfer. If 0 the default (from spi_device) is used.
+ * @bits_per_word: select a bits_per_word other then the device default
+ *      for this transfer. If 0 the default (from spi_device) is used.
  * @cs_change: affects chipselect after this transfer completes
  * @delay_usecs: microseconds to delay after this transfer before
- *      (optionally) changing the chipselect status, then starting
- *      the next transfer or completing this spi_message.
+ *      (optionally) changing the chipselect status, then starting
+ *      the next transfer or completing this spi_message.
  * @transfer_list: transfers are sequenced through spi_message.transfers
  *
  * SPI transfers always write the same number of bytes as they read.
@@ -322,7 +331,9 @@ struct spi_transfer {
         dma_addr_t      rx_dma;
 
         unsigned        cs_change:1;
+        u8              bits_per_word;
         u16             delay_usecs;
+        u32             speed_hz;
 
         struct list_head transfer_list;
 };
@@ -356,7 +367,7 @@ struct spi_transfer {
  * and its transfers, ignore them until its completion callback.
  */
 struct spi_message {
-        struct list_head        transfers;
+        struct list_head        transfers;
 
         struct spi_device       *spi;
 
@@ -374,7 +385,7 @@ struct spi_message {
          */
 
         /* completion is reported through a callback */
-        void                    (*complete)(void *context);
+        void                    (*complete)(void *context);
         void                    *context;
         unsigned                actual_length;
         int                     status;
diff --git a/include/linux/spi/spi_bitbang.h b/include/linux/spi/spi_bitbang.h
index c961fe9bf3eb..16ce178f54d7 100644
--- a/include/linux/spi/spi_bitbang.h
+++ b/include/linux/spi/spi_bitbang.h
@@ -30,6 +30,12 @@ struct spi_bitbang {
 
         struct spi_master       *master;
 
+        /* setup_transfer() changes clock and/or wordsize to match settings
+         * for this transfer; zeroes restore defaults from spi_device.
+         */
+        int     (*setup_transfer)(struct spi_device *spi,
+                        struct spi_transfer *t);
+
         void    (*chipselect)(struct spi_device *spi, int is_on);
 #define BITBANG_CS_ACTIVE       1       /* normally nCS, active low */
 #define BITBANG_CS_INACTIVE     0
@@ -51,6 +57,8 @@ struct spi_bitbang {
 extern int spi_bitbang_setup(struct spi_device *spi);
 extern void spi_bitbang_cleanup(const struct spi_device *spi);
 extern int spi_bitbang_transfer(struct spi_device *spi, struct spi_message *m);
+extern int spi_bitbang_setup_transfer(struct spi_device *spi,
+                                      struct spi_transfer *t);
 
 /* start or stop queue processing */
 extern int spi_bitbang_start(struct spi_bitbang *spi);
diff --git a/include/linux/swap.h b/include/linux/swap.h
index 5b1fdf1cff4f..f03c24719302 100644
--- a/include/linux/swap.h
+++ b/include/linux/swap.h
@@ -296,7 +296,7 @@ static inline void disable_swap_token(void)
 #define read_swap_cache_async(swp,vma,addr)     NULL
 #define lookup_swap_cache(swp)                  NULL
 #define valid_swaphandles(swp, off)             0
-#define can_share_swap_page(p)                  0
+#define can_share_swap_page(p)                  (page_mapcount(p) == 1)
 #define move_to_swap_cache(p, swp)              1
 #define move_from_swap_cache(p, i, m)           1
 #define __delete_from_swap_cache(p)             /*NOTHING*/