Merge master.kernel.org:/pub/scm/linux/kernel/git/lethal/genesis-2.6

16 files changed, 183 insertions, 45 deletions

diff --git a/include/linux/cred.h b/include/linux/cred.h
index 4db09f89b637..52507c3e1387 100644
--- a/include/linux/cred.h
+++ b/include/linux/cred.h
@@ -280,7 +280,7 @@ static inline void put_cred(const struct cred *_cred)
  * task or by holding tasklist_lock to prevent it from being unlinked.
  */
 #define __task_cred(task) \
-        ((const struct cred *)(rcu_dereference_check((task)->real_cred, rcu_read_lock_held() || lockdep_is_held(&tasklist_lock))))
+        ((const struct cred *)(rcu_dereference_check((task)->real_cred, rcu_read_lock_held() || lockdep_tasklist_lock_is_held())))
 
 /**
  * get_task_cred - Get another task's objective credentials
diff --git a/include/linux/ethtool.h b/include/linux/ethtool.h
index cca1c3de140d..b33f316bb92e 100644
--- a/include/linux/ethtool.h
+++ b/include/linux/ethtool.h
@@ -61,6 +61,13 @@ struct ethtool_drvinfo {
                                 /* For PCI devices, use pci_name(pci_dev). */
         char    reserved1[32];
         char    reserved2[12];
+                                /*
+                                 * Some struct members below are filled in
+                                 * using ops->get_sset_count().  Obtaining
+                                 * this info from ethtool_drvinfo is now
+                                 * deprecated; Use ETHTOOL_GSSET_INFO
+                                 * instead.
+                                 */
         __u32   n_priv_flags;   /* number of flags valid in ETHTOOL_GPFLAGS */
         __u32   n_stats;        /* number of u64's from ETHTOOL_GSTATS */
         __u32   testinfo_len;
@@ -253,6 +260,17 @@ struct ethtool_gstrings {
         __u8    data[0];
 };
 
+struct ethtool_sset_info {
+        __u32   cmd;            /* ETHTOOL_GSSET_INFO */
+        __u32   reserved;
+        __u64   sset_mask;      /* input: each bit selects an sset to query */
+                                /* output: each bit a returned sset */
+        __u32   data[0];        /* ETH_SS_xxx count, in order, based on bits
+                                   in sset_mask.  One bit implies one
+                                   __u32, two bits implies two
+                                   __u32's, etc. */
+};
+
 enum ethtool_test_flags {
         ETH_TEST_FL_OFFLINE     = (1 << 0),     /* online / offline */
         ETH_TEST_FL_FAILED      = (1 << 1),     /* test passed / failed */
@@ -606,9 +624,9 @@ struct ethtool_ops {
 #define ETHTOOL_SRXCLSRLINS     0x00000032 /* Insert RX classification rule */
 #define ETHTOOL_FLASHDEV        0x00000033 /* Flash firmware to device */
 #define ETHTOOL_RESET           0x00000034 /* Reset hardware */
-
-#define ETHTOOL_SRXNTUPLE       0x00000035 /* Add an n-tuple filter to device */
-#define ETHTOOL_GRXNTUPLE       0x00000036 /* Get n-tuple filters from device */
+#define ETHTOOL_SRXNTUPLE       0x00000035 /* Add an n-tuple filter to device */
+#define ETHTOOL_GRXNTUPLE       0x00000036 /* Get n-tuple filters from device */
+#define ETHTOOL_GSSET_INFO      0x00000037 /* Get string set info */
 
 /* compatibility with older code */
 #define SPARC_ETH_GSET          ETHTOOL_GSET
diff --git a/include/linux/hw_breakpoint.h b/include/linux/hw_breakpoint.h
index 5977b724f7c6..c70d27af03f9 100644
--- a/include/linux/hw_breakpoint.h
+++ b/include/linux/hw_breakpoint.h
@@ -66,14 +66,14 @@ register_wide_hw_breakpoint_cpu(struct perf_event_attr *attr,
                                 perf_overflow_handler_t triggered,
                                 int cpu);
 
-extern struct perf_event **
+extern struct perf_event * __percpu *
 register_wide_hw_breakpoint(struct perf_event_attr *attr,
                             perf_overflow_handler_t triggered);
 
 extern int register_perf_hw_breakpoint(struct perf_event *bp);
 extern int __register_perf_hw_breakpoint(struct perf_event *bp);
 extern void unregister_hw_breakpoint(struct perf_event *bp);
-extern void unregister_wide_hw_breakpoint(struct perf_event **cpu_events);
+extern void unregister_wide_hw_breakpoint(struct perf_event * __percpu *cpu_events);
 
 extern int dbg_reserve_bp_slot(struct perf_event *bp);
 extern int dbg_release_bp_slot(struct perf_event *bp);
@@ -100,7 +100,7 @@ static inline struct perf_event *
 register_wide_hw_breakpoint_cpu(struct perf_event_attr *attr,
                                 perf_overflow_handler_t  triggered,
                                 int cpu)                { return NULL; }
-static inline struct perf_event **
+static inline struct perf_event * __percpu *
 register_wide_hw_breakpoint(struct perf_event_attr *attr,
                             perf_overflow_handler_t triggered)  { return NULL; }
 static inline int
@@ -109,7 +109,7 @@ static inline int
 __register_perf_hw_breakpoint(struct perf_event *bp)    { return -ENOSYS; }
 static inline void unregister_hw_breakpoint(struct perf_event *bp)      { }
 static inline void
-unregister_wide_hw_breakpoint(struct perf_event **cpu_events)           { }
+unregister_wide_hw_breakpoint(struct perf_event * __percpu *cpu_events) { }
 static inline int
 reserve_bp_slot(struct perf_event *bp)                  {return -ENOSYS; }
 static inline void release_bp_slot(struct perf_event *bp)               { }
diff --git a/include/linux/i2c-algo-bit.h b/include/linux/i2c-algo-bit.h
index 111334f5b922..4f98148c11c3 100644
--- a/include/linux/i2c-algo-bit.h
+++ b/include/linux/i2c-algo-bit.h
@@ -36,6 +36,8 @@ struct i2c_algo_bit_data {
         void (*setscl) (void *data, int state);
         int  (*getsda) (void *data);
         int  (*getscl) (void *data);
+        int  (*pre_xfer)  (struct i2c_adapter *);
+        void (*post_xfer) (struct i2c_adapter *);
 
         /* local settings */
         int udelay;             /* half clock cycle time in us,
diff --git a/include/linux/i2c-xiic.h b/include/linux/i2c-xiic.h
new file mode 100644
index 000000000000..4f9f2256a97e
--- /dev/null
+++ b/include/linux/i2c-xiic.h
@@ -0,0 +1,43 @@
+/*
+ * i2c-xiic.h
+ * Copyright (c) 2009 Intel Corporation
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+/* Supports:
+ * Xilinx IIC
+ */
+
+#ifndef _LINUX_I2C_XIIC_H
+#define _LINUX_I2C_XIIC_H
+
+/**
+ * struct xiic_i2c_platform_data - Platform data of the Xilinx I2C driver
+ * @num_devices:        Number of devices that shall be added when the driver
+ *                      is probed.
+ * @devices:            The actuall devices to add.
+ *
+ * This purpose of this platform data struct is to be able to provide a number
+ * of devices that should be added to the I2C bus. The reason is that sometimes
+ * the I2C board info is not enough, a new PCI board can for instance be
+ * plugged into a standard PC, and the bus number might be unknown at
+ * early init time.
+ */
+struct xiic_i2c_platform_data {
+        u8                              num_devices;
+        struct i2c_board_info const     *devices;
+};
+
+#endif /* _LINUX_I2C_XIIC_H */
diff --git a/include/linux/input.h b/include/linux/input.h
index dc24effb6d0e..7ed2251b33f1 100644
--- a/include/linux/input.h
+++ b/include/linux/input.h
@@ -58,10 +58,10 @@ struct input_absinfo {
 
 #define EVIOCGVERSION           _IOR('E', 0x01, int)                    /* get driver version */
 #define EVIOCGID                _IOR('E', 0x02, struct input_id)        /* get device ID */
-#define EVIOCGREP               _IOR('E', 0x03, int[2])                 /* get repeat settings */
-#define EVIOCSREP               _IOW('E', 0x03, int[2])                 /* set repeat settings */
-#define EVIOCGKEYCODE           _IOR('E', 0x04, int[2])                 /* get keycode */
-#define EVIOCSKEYCODE           _IOW('E', 0x04, int[2])                 /* set keycode */
+#define EVIOCGREP               _IOR('E', 0x03, unsigned int[2])        /* get repeat settings */
+#define EVIOCSREP               _IOW('E', 0x03, unsigned int[2])        /* set repeat settings */
+#define EVIOCGKEYCODE           _IOR('E', 0x04, unsigned int[2])        /* get keycode */
+#define EVIOCSKEYCODE           _IOW('E', 0x04, unsigned int[2])        /* set keycode */
 
 #define EVIOCGNAME(len)         _IOC(_IOC_READ, 'E', 0x06, len)         /* get device name */
 #define EVIOCGPHYS(len)         _IOC(_IOC_READ, 'E', 0x07, len)         /* get physical location */
@@ -1142,8 +1142,10 @@ struct input_dev {
         unsigned int keycodemax;
         unsigned int keycodesize;
         void *keycode;
-        int (*setkeycode)(struct input_dev *dev, int scancode, int keycode);
-        int (*getkeycode)(struct input_dev *dev, int scancode, int *keycode);
+        int (*setkeycode)(struct input_dev *dev,
+                          unsigned int scancode, unsigned int keycode);
+        int (*getkeycode)(struct input_dev *dev,
+                          unsigned int scancode, unsigned int *keycode);
 
         struct ff_device *ff;
 
@@ -1415,8 +1417,10 @@ static inline void input_set_abs_params(struct input_dev *dev, int axis, int min
         dev->absbit[BIT_WORD(axis)] |= BIT_MASK(axis);
 }
 
-int input_get_keycode(struct input_dev *dev, int scancode, int *keycode);
-int input_set_keycode(struct input_dev *dev, int scancode, int keycode);
+int input_get_keycode(struct input_dev *dev,
+                      unsigned int scancode, unsigned int *keycode);
+int input_set_keycode(struct input_dev *dev,
+                      unsigned int scancode, unsigned int keycode);
 
 extern struct class input_class;
 
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index 7b18b4fd5df7..6f8cd7da1a01 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -487,9 +487,8 @@ struct hw_perf_event {
                         struct hrtimer  hrtimer;
                 };
 #ifdef CONFIG_HAVE_HW_BREAKPOINT
-                union { /* breakpoint */
-                        struct arch_hw_breakpoint       info;
-                };
+                /* breakpoint */
+                struct arch_hw_breakpoint       info;
 #endif
         };
         atomic64_t                      prev_count;
@@ -802,6 +801,13 @@ struct perf_sample_data {
         struct perf_raw_record          *raw;
 };
 
+static inline
+void perf_sample_data_init(struct perf_sample_data *data, u64 addr)
+{
+        data->addr = addr;
+        data->raw  = NULL;
+}
+
 extern void perf_output_sample(struct perf_output_handle *handle,
                                struct perf_event_header *header,
                                struct perf_sample_data *data,
@@ -858,6 +864,21 @@ extern int sysctl_perf_event_paranoid;
 extern int sysctl_perf_event_mlock;
 extern int sysctl_perf_event_sample_rate;
 
+static inline bool perf_paranoid_tracepoint_raw(void)
+{
+        return sysctl_perf_event_paranoid > -1;
+}
+
+static inline bool perf_paranoid_cpu(void)
+{
+        return sysctl_perf_event_paranoid > 0;
+}
+
+static inline bool perf_paranoid_kernel(void)
+{
+        return sysctl_perf_event_paranoid > 1;
+}
+
 extern void perf_event_init(void);
 extern void perf_tp_event(int event_id, u64 addr, u64 count, void *record, int entry_size);
 extern void perf_bp_event(struct perf_event *event, void *data);
diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h
index a005cac5e302..3024050c82a1 100644
--- a/include/linux/rcupdate.h
+++ b/include/linux/rcupdate.h
@@ -101,6 +101,11 @@ extern struct lockdep_map rcu_sched_lock_map;
 # define rcu_read_release_sched() \
                 lock_release(&rcu_sched_lock_map, 1, _THIS_IP_)
 
+static inline int debug_lockdep_rcu_enabled(void)
+{
+        return likely(rcu_scheduler_active && debug_locks);
+}
+
 /**
  * rcu_read_lock_held - might we be in RCU read-side critical section?
  *
@@ -108,12 +113,14 @@ extern struct lockdep_map rcu_sched_lock_map;
  * an RCU read-side critical section.  In absence of CONFIG_PROVE_LOCKING,
  * this assumes we are in an RCU read-side critical section unless it can
  * prove otherwise.
+ *
+ * Check rcu_scheduler_active to prevent false positives during boot.
  */
 static inline int rcu_read_lock_held(void)
 {
-        if (debug_locks)
-                return lock_is_held(&rcu_lock_map);
-        return 1;
+        if (!debug_lockdep_rcu_enabled())
+                return 1;
+        return lock_is_held(&rcu_lock_map);
 }
 
 /**
@@ -123,12 +130,14 @@ static inline int rcu_read_lock_held(void)
  * an RCU-bh read-side critical section.  In absence of CONFIG_PROVE_LOCKING,
  * this assumes we are in an RCU-bh read-side critical section unless it can
  * prove otherwise.
+ *
+ * Check rcu_scheduler_active to prevent false positives during boot.
  */
 static inline int rcu_read_lock_bh_held(void)
 {
-        if (debug_locks)
-                return lock_is_held(&rcu_bh_lock_map);
-        return 1;
+        if (!debug_lockdep_rcu_enabled())
+                return 1;
+        return lock_is_held(&rcu_bh_lock_map);
 }
 
 /**
@@ -139,15 +148,26 @@ static inline int rcu_read_lock_bh_held(void)
  * this assumes we are in an RCU-sched read-side critical section unless it
  * can prove otherwise.  Note that disabling of preemption (including
  * disabling irqs) counts as an RCU-sched read-side critical section.
+ *
+ * Check rcu_scheduler_active to prevent false positives during boot.
  */
+#ifdef CONFIG_PREEMPT
 static inline int rcu_read_lock_sched_held(void)
 {
         int lockdep_opinion = 0;
 
+        if (!debug_lockdep_rcu_enabled())
+                return 1;
         if (debug_locks)
                 lockdep_opinion = lock_is_held(&rcu_sched_lock_map);
-        return lockdep_opinion || preempt_count() != 0 || !rcu_scheduler_active;
+        return lockdep_opinion || preempt_count() != 0;
+}
+#else /* #ifdef CONFIG_PREEMPT */
+static inline int rcu_read_lock_sched_held(void)
+{
+        return 1;
 }
+#endif /* #else #ifdef CONFIG_PREEMPT */
 
 #else /* #ifdef CONFIG_DEBUG_LOCK_ALLOC */
 
@@ -168,10 +188,17 @@ static inline int rcu_read_lock_bh_held(void)
         return 1;
 }
 
+#ifdef CONFIG_PREEMPT
 static inline int rcu_read_lock_sched_held(void)
 {
-        return preempt_count() != 0 || !rcu_scheduler_active;
+        return !rcu_scheduler_active || preempt_count() != 0;
+}
+#else /* #ifdef CONFIG_PREEMPT */
+static inline int rcu_read_lock_sched_held(void)
+{
+        return 1;
 }
+#endif /* #else #ifdef CONFIG_PREEMPT */
 
 #endif /* #else #ifdef CONFIG_DEBUG_LOCK_ALLOC */
 
@@ -188,7 +215,7 @@ static inline int rcu_read_lock_sched_held(void)
  */
 #define rcu_dereference_check(p, c) \
         ({ \
-                if (debug_locks && !(c)) \
+                if (debug_lockdep_rcu_enabled() && !(c)) \
                         lockdep_rcu_dereference(__FILE__, __LINE__); \
                 rcu_dereference_raw(p); \
         })
diff --git a/include/linux/rfkill.h b/include/linux/rfkill.h
index 97059d08a626..4f82326eb294 100644
--- a/include/linux/rfkill.h
+++ b/include/linux/rfkill.h
@@ -29,7 +29,7 @@
 /**
  * enum rfkill_type - type of rfkill switch.
  *
- * @RFKILL_TYPE_ALL: toggles all switches (userspace only)
+ * @RFKILL_TYPE_ALL: toggles all switches (requests only - not a switch type)
  * @RFKILL_TYPE_WLAN: switch is on a 802.11 wireless network device.
  * @RFKILL_TYPE_BLUETOOTH: switch is on a bluetooth device.
  * @RFKILL_TYPE_UWB: switch is on a ultra wideband device.
diff --git a/include/linux/rwlock.h b/include/linux/rwlock.h
index 71e0b00b6f2c..bc2994ed66e1 100644
--- a/include/linux/rwlock.h
+++ b/include/linux/rwlock.h
@@ -29,25 +29,25 @@ do {								\
 #endif
 
 #ifdef CONFIG_DEBUG_SPINLOCK
- extern void do_raw_read_lock(rwlock_t *lock);
+ extern void do_raw_read_lock(rwlock_t *lock) __acquires(lock);
 #define do_raw_read_lock_flags(lock, flags) do_raw_read_lock(lock)
  extern int do_raw_read_trylock(rwlock_t *lock);
- extern void do_raw_read_unlock(rwlock_t *lock);
- extern void do_raw_write_lock(rwlock_t *lock);
+ extern void do_raw_read_unlock(rwlock_t *lock) __releases(lock);
+ extern void do_raw_write_lock(rwlock_t *lock) __acquires(lock);
 #define do_raw_write_lock_flags(lock, flags) do_raw_write_lock(lock)
  extern int do_raw_write_trylock(rwlock_t *lock);
- extern void do_raw_write_unlock(rwlock_t *lock);
+ extern void do_raw_write_unlock(rwlock_t *lock) __releases(lock);
 #else
-# define do_raw_read_lock(rwlock)       arch_read_lock(&(rwlock)->raw_lock)
+# define do_raw_read_lock(rwlock)       do {__acquire(lock); arch_read_lock(&(rwlock)->raw_lock); } while (0)
 # define do_raw_read_lock_flags(lock, flags) \
-                arch_read_lock_flags(&(lock)->raw_lock, *(flags))
+                do {__acquire(lock); arch_read_lock_flags(&(lock)->raw_lock, *(flags)); } while (0)
 # define do_raw_read_trylock(rwlock)    arch_read_trylock(&(rwlock)->raw_lock)
-# define do_raw_read_unlock(rwlock)     arch_read_unlock(&(rwlock)->raw_lock)
-# define do_raw_write_lock(rwlock)      arch_write_lock(&(rwlock)->raw_lock)
+# define do_raw_read_unlock(rwlock)     do {arch_read_unlock(&(rwlock)->raw_lock); __release(lock); } while (0)
+# define do_raw_write_lock(rwlock)      do {__acquire(lock); arch_write_lock(&(rwlock)->raw_lock); } while (0)
 # define do_raw_write_lock_flags(lock, flags) \
-                arch_write_lock_flags(&(lock)->raw_lock, *(flags))
+                do {__acquire(lock); arch_write_lock_flags(&(lock)->raw_lock, *(flags)); } while (0)
 # define do_raw_write_trylock(rwlock)   arch_write_trylock(&(rwlock)->raw_lock)
-# define do_raw_write_unlock(rwlock)    arch_write_unlock(&(rwlock)->raw_lock)
+# define do_raw_write_unlock(rwlock)    do {arch_write_unlock(&(rwlock)->raw_lock); __release(lock); } while (0)
 #endif
 
 #define read_can_lock(rwlock)           arch_read_can_lock(&(rwlock)->raw_lock)
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 8d70ff802da2..dad7f668ebf7 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -258,6 +258,10 @@ extern spinlock_t mmlist_lock;
 
 struct task_struct;
 
+#ifdef CONFIG_PROVE_RCU
+extern int lockdep_tasklist_lock_is_held(void);
+#endif /* #ifdef CONFIG_PROVE_RCU */
+
 extern void sched_init(void);
 extern void sched_init_smp(void);
 extern asmlinkage void schedule_tail(struct task_struct *prev);
diff --git a/include/linux/snmp.h b/include/linux/snmp.h
index e28f5a0182e8..4435d1084755 100644
--- a/include/linux/snmp.h
+++ b/include/linux/snmp.h
@@ -225,6 +225,8 @@ enum
         LINUX_MIB_SACKSHIFTED,
         LINUX_MIB_SACKMERGED,
         LINUX_MIB_SACKSHIFTFALLBACK,
+        LINUX_MIB_TCPBACKLOGDROP,
+        LINUX_MIB_TCPMINTTLDROP, /* RFC 5082 */
         __LINUX_MIB_MAX
 };
 
diff --git a/include/linux/spi/ads7846.h b/include/linux/spi/ads7846.h
index 51948eb6927a..b4ae570d3c98 100644
--- a/include/linux/spi/ads7846.h
+++ b/include/linux/spi/ads7846.h
@@ -12,7 +12,7 @@ enum ads7846_filter {
 };
 
 struct ads7846_platform_data {
-        u16     model;                  /* 7843, 7845, 7846. */
+        u16     model;                  /* 7843, 7845, 7846, 7873. */
         u16     vref_delay_usecs;       /* 0 for external vref; etc */
         u16     vref_mv;                /* external vref value, milliVolts */
         bool    keep_vref_on;           /* set to keep vref on for differential
@@ -53,5 +53,6 @@ struct ads7846_platform_data {
         int     (*filter)       (void *filter_data, int data_idx, int *val);
         void    (*filter_cleanup)(void *filter_data);
         void    (*wait_for_sync)(void);
+        bool    wakeup;
 };
 
diff --git a/include/linux/spinlock.h b/include/linux/spinlock.h
index 86088213334a..89fac6a3f78b 100644
--- a/include/linux/spinlock.h
+++ b/include/linux/spinlock.h
@@ -128,19 +128,21 @@ static inline void smp_mb__after_lock(void) { smp_mb(); }
 #define raw_spin_unlock_wait(lock)      arch_spin_unlock_wait(&(lock)->raw_lock)
 
 #ifdef CONFIG_DEBUG_SPINLOCK
- extern void do_raw_spin_lock(raw_spinlock_t *lock);
+ extern void do_raw_spin_lock(raw_spinlock_t *lock) __acquires(lock);
 #define do_raw_spin_lock_flags(lock, flags) do_raw_spin_lock(lock)
  extern int do_raw_spin_trylock(raw_spinlock_t *lock);
- extern void do_raw_spin_unlock(raw_spinlock_t *lock);
+ extern void do_raw_spin_unlock(raw_spinlock_t *lock) __releases(lock);
 #else
-static inline void do_raw_spin_lock(raw_spinlock_t *lock)
+static inline void do_raw_spin_lock(raw_spinlock_t *lock) __acquires(lock)
 {
+        __acquire(lock);
         arch_spin_lock(&lock->raw_lock);
 }
 
 static inline void
-do_raw_spin_lock_flags(raw_spinlock_t *lock, unsigned long *flags)
+do_raw_spin_lock_flags(raw_spinlock_t *lock, unsigned long *flags) __acquires(lock)
 {
+        __acquire(lock);
         arch_spin_lock_flags(&lock->raw_lock, *flags);
 }
 
@@ -149,9 +151,10 @@ static inline int do_raw_spin_trylock(raw_spinlock_t *lock)
         return arch_spin_trylock(&(lock)->raw_lock);
 }
 
-static inline void do_raw_spin_unlock(raw_spinlock_t *lock)
+static inline void do_raw_spin_unlock(raw_spinlock_t *lock) __releases(lock)
 {
         arch_spin_unlock(&lock->raw_lock);
+        __release(lock);
 }
 #endif
 
diff --git a/include/linux/virtio.h b/include/linux/virtio.h
index f508c651e53d..40d1709bdbf4 100644
--- a/include/linux/virtio.h
+++ b/include/linux/virtio.h
@@ -98,6 +98,7 @@ struct virtio_device {
         void *priv;
 };
 
+#define dev_to_virtio(dev) container_of(dev, struct virtio_device, dev)
 int register_virtio_device(struct virtio_device *dev);
 void unregister_virtio_device(struct virtio_device *dev);
 
diff --git a/include/linux/virtio_9p.h b/include/linux/virtio_9p.h
index 332275080083..5cf11765146b 100644
--- a/include/linux/virtio_9p.h
+++ b/include/linux/virtio_9p.h
@@ -5,4 +5,16 @@
 #include <linux/virtio_ids.h>
 #include <linux/virtio_config.h>
 
+/* The feature bitmap for virtio 9P */
+
+/* The mount point is specified in a config variable */
+#define VIRTIO_9P_MOUNT_TAG 0
+
+struct virtio_9p_config {
+        /* length of the tag name */
+        __u16 tag_len;
+        /* non-NULL terminated tag name */
+        __u8 tag[0];
+} __attribute__((packed));
+
 #endif /* _LINUX_VIRTIO_9P_H */