Merge branch 'sched/urgent' into sched/core, to pick up fixes before applying more changes

Signed-off-by: Ingo Molnar <mingo@kernel.org>

15 files changed, 81 insertions, 90 deletions

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 0207a78a8d82..aac0f9ea952a 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -1136,8 +1136,7 @@ static inline bool blk_needs_flush_plug(struct task_struct *tsk)
 /*
  * tag stuff
  */
-#define blk_rq_tagged(rq) \
-        ((rq)->mq_ctx || ((rq)->cmd_flags & REQ_QUEUED))
+#define blk_rq_tagged(rq)               ((rq)->cmd_flags & REQ_QUEUED)
 extern int blk_queue_start_tag(struct request_queue *, struct request *);
 extern struct request *blk_queue_find_tag(struct request_queue *, int);
 extern void blk_queue_end_tag(struct request_queue *, struct request *);
@@ -1583,13 +1582,13 @@ static inline bool blk_integrity_merge_rq(struct request_queue *rq,
                                           struct request *r1,
                                           struct request *r2)
 {
-        return 0;
+        return true;
 }
 static inline bool blk_integrity_merge_bio(struct request_queue *rq,
                                            struct request *r,
                                            struct bio *b)
 {
-        return 0;
+        return true;
 }
 static inline bool blk_integrity_is_initialized(struct gendisk *g)
 {
diff --git a/include/linux/cma.h b/include/linux/cma.h
index 0430ed05d3b9..a93438beb33c 100644
--- a/include/linux/cma.h
+++ b/include/linux/cma.h
@@ -18,12 +18,12 @@ struct cma;
 extern phys_addr_t cma_get_base(struct cma *cma);
 extern unsigned long cma_get_size(struct cma *cma);
 
-extern int __init cma_declare_contiguous(phys_addr_t size,
-                        phys_addr_t base, phys_addr_t limit,
+extern int __init cma_declare_contiguous(phys_addr_t base,
+                        phys_addr_t size, phys_addr_t limit,
                         phys_addr_t alignment, unsigned int order_per_bit,
                         bool fixed, struct cma **res_cma);
-extern int cma_init_reserved_mem(phys_addr_t size,
-                                        phys_addr_t base, int order_per_bit,
+extern int cma_init_reserved_mem(phys_addr_t base,
+                                        phys_addr_t size, int order_per_bit,
                                         struct cma **res_cma);
 extern struct page *cma_alloc(struct cma *cma, int count, unsigned int align);
 extern bool cma_release(struct cma *cma, struct page *pages, int count);
diff --git a/include/linux/compiler-gcc4.h b/include/linux/compiler-gcc4.h
index 2507fd2a1eb4..d1a558239b1a 100644
--- a/include/linux/compiler-gcc4.h
+++ b/include/linux/compiler-gcc4.h
@@ -71,7 +71,6 @@
  *   http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58670
  *
  * Work it around via a compiler barrier quirk suggested by Jakub Jelinek.
- * Fixed in GCC 4.8.2 and later versions.
  *
  * (asm goto is automatically volatile - the naming reflects this.)
  */
diff --git a/include/linux/compiler-gcc5.h b/include/linux/compiler-gcc5.h
index cdd1cc202d51..c8c565952548 100644
--- a/include/linux/compiler-gcc5.h
+++ b/include/linux/compiler-gcc5.h
@@ -53,7 +53,6 @@
  *   http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58670
  *
  * Work it around via a compiler barrier quirk suggested by Jakub Jelinek.
- * Fixed in GCC 4.8.2 and later versions.
  *
  * (asm goto is automatically volatile - the naming reflects this.)
  */
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 4e41a4a331bb..9ab779e8a63c 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -639,11 +639,13 @@ static inline int inode_unhashed(struct inode *inode)
  * 2: child/target
  * 3: xattr
  * 4: second non-directory
- * The last is for certain operations (such as rename) which lock two
+ * 5: second parent (when locking independent directories in rename)
+ *
+ * I_MUTEX_NONDIR2 is for certain operations (such as rename) which lock two
  * non-directories at once.
  *
  * The locking order between these classes is
- * parent -> child -> normal -> xattr -> second non-directory
+ * parent[2] -> child -> grandchild -> normal -> xattr -> second non-directory
  */
 enum inode_i_mutex_lock_class
 {
@@ -651,7 +653,8 @@ enum inode_i_mutex_lock_class
         I_MUTEX_PARENT,
         I_MUTEX_CHILD,
         I_MUTEX_XATTR,
-        I_MUTEX_NONDIR2
+        I_MUTEX_NONDIR2,
+        I_MUTEX_PARENT2,
 };
 
 void lock_two_nondirectories(struct inode *, struct inode*);
@@ -2466,6 +2469,7 @@ extern ssize_t new_sync_read(struct file *filp, char __user *buf, size_t len, lo
 extern ssize_t new_sync_write(struct file *filp, const char __user *buf, size_t len, loff_t *ppos);
 
 /* fs/block_dev.c */
+extern ssize_t blkdev_read_iter(struct kiocb *iocb, struct iov_iter *to);
 extern ssize_t blkdev_write_iter(struct kiocb *iocb, struct iov_iter *from);
 extern int blkdev_fsync(struct file *filp, loff_t start, loff_t end,
                         int datasync);
diff --git a/include/linux/kernel_stat.h b/include/linux/kernel_stat.h
index 8422b4ed6882..b9376cd5a187 100644
--- a/include/linux/kernel_stat.h
+++ b/include/linux/kernel_stat.h
@@ -77,11 +77,6 @@ static inline unsigned int kstat_cpu_irqs_sum(unsigned int cpu)
         return kstat_cpu(cpu).irqs_sum;
 }
 
-/*
- * Lock/unlock the current runqueue - to extract task statistics:
- */
-extern unsigned long long task_delta_exec(struct task_struct *);
-
 extern void account_user_time(struct task_struct *, cputime_t, cputime_t);
 extern void account_system_time(struct task_struct *, int, cputime_t, cputime_t);
 extern void account_steal_time(cputime_t);
diff --git a/include/linux/khugepaged.h b/include/linux/khugepaged.h
index 6b394f0b5148..eeb307985715 100644
--- a/include/linux/khugepaged.h
+++ b/include/linux/khugepaged.h
@@ -6,7 +6,8 @@
 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
 extern int __khugepaged_enter(struct mm_struct *mm);
 extern void __khugepaged_exit(struct mm_struct *mm);
-extern int khugepaged_enter_vma_merge(struct vm_area_struct *vma);
+extern int khugepaged_enter_vma_merge(struct vm_area_struct *vma,
+                                      unsigned long vm_flags);
 
 #define khugepaged_enabled()                                           \
         (transparent_hugepage_flags &                                  \
@@ -35,13 +36,13 @@ static inline void khugepaged_exit(struct mm_struct *mm)
                 __khugepaged_exit(mm);
 }
 
-static inline int khugepaged_enter(struct vm_area_struct *vma)
+static inline int khugepaged_enter(struct vm_area_struct *vma,
+                                   unsigned long vm_flags)
 {
         if (!test_bit(MMF_VM_HUGEPAGE, &vma->vm_mm->flags))
                 if ((khugepaged_always() ||
-                     (khugepaged_req_madv() &&
-                      vma->vm_flags & VM_HUGEPAGE)) &&
-                    !(vma->vm_flags & VM_NOHUGEPAGE))
+                     (khugepaged_req_madv() && (vm_flags & VM_HUGEPAGE))) &&
+                    !(vm_flags & VM_NOHUGEPAGE))
                         if (__khugepaged_enter(vma->vm_mm))
                                 return -ENOMEM;
         return 0;
@@ -54,11 +55,13 @@ static inline int khugepaged_fork(struct mm_struct *mm, struct mm_struct *oldmm)
 static inline void khugepaged_exit(struct mm_struct *mm)
 {
 }
-static inline int khugepaged_enter(struct vm_area_struct *vma)
+static inline int khugepaged_enter(struct vm_area_struct *vma,
+                                   unsigned long vm_flags)
 {
         return 0;
 }
-static inline int khugepaged_enter_vma_merge(struct vm_area_struct *vma)
+static inline int khugepaged_enter_vma_merge(struct vm_area_struct *vma,
+                                             unsigned long vm_flags)
 {
         return 0;
 }
diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index 19df5d857411..6b75640ef5ab 100644
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -139,48 +139,23 @@ static inline bool mem_cgroup_disabled(void)
         return false;
 }
 
-void __mem_cgroup_begin_update_page_stat(struct page *page, bool *locked,
-                                         unsigned long *flags);
-
-extern atomic_t memcg_moving;
-
-static inline void mem_cgroup_begin_update_page_stat(struct page *page,
-                                        bool *locked, unsigned long *flags)
-{
-        if (mem_cgroup_disabled())
-                return;
-        rcu_read_lock();
-        *locked = false;
-        if (atomic_read(&memcg_moving))
-                __mem_cgroup_begin_update_page_stat(page, locked, flags);
-}
-
-void __mem_cgroup_end_update_page_stat(struct page *page,
-                                unsigned long *flags);
-static inline void mem_cgroup_end_update_page_stat(struct page *page,
-                                        bool *locked, unsigned long *flags)
-{
-        if (mem_cgroup_disabled())
-                return;
-        if (*locked)
-                __mem_cgroup_end_update_page_stat(page, flags);
-        rcu_read_unlock();
-}
-
-void mem_cgroup_update_page_stat(struct page *page,
-                                 enum mem_cgroup_stat_index idx,
-                                 int val);
-
-static inline void mem_cgroup_inc_page_stat(struct page *page,
+struct mem_cgroup *mem_cgroup_begin_page_stat(struct page *page, bool *locked,
+                                              unsigned long *flags);
+void mem_cgroup_end_page_stat(struct mem_cgroup *memcg, bool locked,
+                              unsigned long flags);
+void mem_cgroup_update_page_stat(struct mem_cgroup *memcg,
+                                 enum mem_cgroup_stat_index idx, int val);
+
+static inline void mem_cgroup_inc_page_stat(struct mem_cgroup *memcg,
                                             enum mem_cgroup_stat_index idx)
 {
-        mem_cgroup_update_page_stat(page, idx, 1);
+        mem_cgroup_update_page_stat(memcg, idx, 1);
 }
 
-static inline void mem_cgroup_dec_page_stat(struct page *page,
+static inline void mem_cgroup_dec_page_stat(struct mem_cgroup *memcg,
                                             enum mem_cgroup_stat_index idx)
 {
-        mem_cgroup_update_page_stat(page, idx, -1);
+        mem_cgroup_update_page_stat(memcg, idx, -1);
 }
 
 unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order,
@@ -315,13 +290,14 @@ mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p)
 {
 }
 
-static inline void mem_cgroup_begin_update_page_stat(struct page *page,
+static inline struct mem_cgroup *mem_cgroup_begin_page_stat(struct page *page,
                                         bool *locked, unsigned long *flags)
 {
+        return NULL;
 }
 
-static inline void mem_cgroup_end_update_page_stat(struct page *page,
-                                        bool *locked, unsigned long *flags)
+static inline void mem_cgroup_end_page_stat(struct mem_cgroup *memcg,
+                                        bool locked, unsigned long flags)
 {
 }
 
@@ -343,12 +319,12 @@ static inline bool mem_cgroup_oom_synchronize(bool wait)
         return false;
 }
 
-static inline void mem_cgroup_inc_page_stat(struct page *page,
+static inline void mem_cgroup_inc_page_stat(struct mem_cgroup *memcg,
                                             enum mem_cgroup_stat_index idx)
 {
 }
 
-static inline void mem_cgroup_dec_page_stat(struct page *page,
+static inline void mem_cgroup_dec_page_stat(struct mem_cgroup *memcg,
                                             enum mem_cgroup_stat_index idx)
 {
 }
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 27eb1bfbe704..b46461116cd2 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1235,7 +1235,6 @@ int __set_page_dirty_no_writeback(struct page *page);
 int redirty_page_for_writepage(struct writeback_control *wbc,
                                 struct page *page);
 void account_page_dirtied(struct page *page, struct address_space *mapping);
-void account_page_writeback(struct page *page);
 int set_page_dirty(struct page *page);
 int set_page_dirty_lock(struct page *page);
 int clear_page_dirty_for_io(struct page *page);
diff --git a/include/linux/mtd/spi-nor.h b/include/linux/mtd/spi-nor.h
index 9e6294f32ba8..046a0a2e4c4e 100644
--- a/include/linux/mtd/spi-nor.h
+++ b/include/linux/mtd/spi-nor.h
@@ -187,32 +187,17 @@ struct spi_nor {
 /**
  * spi_nor_scan() - scan the SPI NOR
  * @nor:        the spi_nor structure
- * @id:         the spi_device_id provided by the driver
+ * @name:       the chip type name
  * @mode:       the read mode supported by the driver
  *
  * The drivers can use this fuction to scan the SPI NOR.
  * In the scanning, it will try to get all the necessary information to
  * fill the mtd_info{} and the spi_nor{}.
  *
- * The board may assigns a spi_device_id with @id which be used to compared with
- * the spi_device_id detected by the scanning.
+ * The chip type name can be provided through the @name parameter.
  *
  * Return: 0 for success, others for failure.
  */
-int spi_nor_scan(struct spi_nor *nor, const struct spi_device_id *id,
-                        enum read_mode mode);
-extern const struct spi_device_id spi_nor_ids[];
-
-/**
- * spi_nor_match_id() - find the spi_device_id by the name
- * @name:       the name of the spi_device_id
- *
- * The drivers use this function to find the spi_device_id
- * specified by the @name.
- *
- * Return: returns the right spi_device_id pointer on success,
- *         and returns NULL on failure.
- */
-const struct spi_device_id *spi_nor_match_id(char *name);
+int spi_nor_scan(struct spi_nor *nor, const char *name, enum read_mode mode);
 
 #endif
diff --git a/include/linux/of_reserved_mem.h b/include/linux/of_reserved_mem.h
index 5b5efae09135..ad2f67054372 100644
--- a/include/linux/of_reserved_mem.h
+++ b/include/linux/of_reserved_mem.h
@@ -16,7 +16,7 @@ struct reserved_mem {
 };
 
 struct reserved_mem_ops {
-        void    (*device_init)(struct reserved_mem *rmem,
+        int     (*device_init)(struct reserved_mem *rmem,
                                struct device *dev);
         void    (*device_release)(struct reserved_mem *rmem,
                                   struct device *dev);
@@ -28,14 +28,17 @@ typedef int (*reservedmem_of_init_fn)(struct reserved_mem *rmem);
         _OF_DECLARE(reservedmem, name, compat, init, reservedmem_of_init_fn)
 
 #ifdef CONFIG_OF_RESERVED_MEM
-void of_reserved_mem_device_init(struct device *dev);
+int of_reserved_mem_device_init(struct device *dev);
 void of_reserved_mem_device_release(struct device *dev);
 
 void fdt_init_reserved_mem(void);
 void fdt_reserved_mem_save_node(unsigned long node, const char *uname,
                                phys_addr_t base, phys_addr_t size);
 #else
-static inline void of_reserved_mem_device_init(struct device *dev) { }
+static inline int of_reserved_mem_device_init(struct device *dev)
+{
+        return -ENOSYS;
+}
 static inline void of_reserved_mem_device_release(struct device *pdev) { }
 
 static inline void fdt_init_reserved_mem(void) { }
diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h
index a4a819ffb2d1..53ff1a752d7e 100644
--- a/include/linux/rcupdate.h
+++ b/include/linux/rcupdate.h
@@ -617,6 +617,21 @@ static inline void rcu_preempt_sleep_check(void)
 #define RCU_INITIALIZER(v) (typeof(*(v)) __force __rcu *)(v)
 
 /**
+ * lockless_dereference() - safely load a pointer for later dereference
+ * @p: The pointer to load
+ *
+ * Similar to rcu_dereference(), but for situations where the pointed-to
+ * object's lifetime is managed by something other than RCU.  That
+ * "something other" might be reference counting or simple immortality.
+ */
+#define lockless_dereference(p) \
+({ \
+        typeof(p) _________p1 = ACCESS_ONCE(p); \
+        smp_read_barrier_depends(); /* Dependency order vs. p above. */ \
+        (_________p1); \
+})
+
+/**
  * rcu_assign_pointer() - assign to RCU-protected pointer
  * @p: pointer to assign to
  * @v: value to assign (publish)
diff --git a/include/linux/regulator/consumer.h b/include/linux/regulator/consumer.h
index d347c805f923..f540b1496e2f 100644
--- a/include/linux/regulator/consumer.h
+++ b/include/linux/regulator/consumer.h
@@ -35,6 +35,8 @@
 #ifndef __LINUX_REGULATOR_CONSUMER_H_
 #define __LINUX_REGULATOR_CONSUMER_H_
 
+#include <linux/err.h>
+
 struct device;
 struct notifier_block;
 struct regmap;
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index a59d9343c25b..6c8b6f604e76 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -557,7 +557,9 @@ struct sk_buff {
         /* fields enclosed in headers_start/headers_end are copied
          * using a single memcpy() in __copy_skb_header()
          */
+        /* private: */
         __u32                   headers_start[0];
+        /* public: */
 
 /* if you move pkt_type around you also must adapt those constants */
 #ifdef __BIG_ENDIAN_BITFIELD
@@ -642,7 +644,9 @@ struct sk_buff {
         __u16                   network_header;
         __u16                   mac_header;
 
+        /* private: */
         __u32                   headers_end[0];
+        /* public: */
 
         /* These elements must be at the end, see alloc_skb() for details.  */
         sk_buff_data_t          tail;
@@ -795,15 +799,19 @@ struct sk_buff_fclones {
  *      @skb: buffer
  *
  * Returns true is skb is a fast clone, and its clone is not freed.
+ * Some drivers call skb_orphan() in their ndo_start_xmit(),
+ * so we also check that this didnt happen.
  */
-static inline bool skb_fclone_busy(const struct sk_buff *skb)
+static inline bool skb_fclone_busy(const struct sock *sk,
+                                   const struct sk_buff *skb)
 {
         const struct sk_buff_fclones *fclones;
 
         fclones = container_of(skb, struct sk_buff_fclones, skb1);
 
         return skb->fclone == SKB_FCLONE_ORIG &&
-               fclones->skb2.fclone == SKB_FCLONE_CLONE;
+               fclones->skb2.fclone == SKB_FCLONE_CLONE &&
+               fclones->skb2.sk == sk;
 }
 
 static inline struct sk_buff *alloc_skb_fclone(unsigned int size,
diff --git a/include/linux/usb/usbnet.h b/include/linux/usb/usbnet.h
index 26088feb6608..d9a4905e01d0 100644
--- a/include/linux/usb/usbnet.h
+++ b/include/linux/usb/usbnet.h
@@ -78,6 +78,7 @@ struct usbnet {
 #               define EVENT_NO_RUNTIME_PM      9
 #               define EVENT_RX_KILL    10
 #               define EVENT_LINK_CHANGE        11
+#               define EVENT_SET_RX_MODE        12
 };
 
 static inline struct usb_driver *driver_of(struct usb_interface *intf)
@@ -159,6 +160,9 @@ struct driver_info {
         /* called by minidriver when receiving indication */
         void    (*indication)(struct usbnet *dev, void *ind, int indlen);
 
+        /* rx mode change (device changes address list filtering) */
+        void    (*set_rx_mode)(struct usbnet *dev);
+
         /* for new devices, use the descriptor-reading code instead */
         int             in;             /* rx endpoint */
         int             out;            /* tx endpoint */