Merge branch 'next' (accumulated 3.16 merge window patches) into master

Now that 3.15 is released, this merges the 'next' branch into 'master',
bringing us to the normal situation where my 'master' branch is the
merge window.

* accumulated work in next: (6809 commits)
  ufs: sb mutex merge + mutex_destroy
  powerpc: update comments for generic idle conversion
  cris: update comments for generic idle conversion
  idle: remove cpu_idle() forward declarations
  nbd: zero from and len fields in NBD_CMD_DISCONNECT.
  mm: convert some level-less printks to pr_*
  MAINTAINERS: adi-buildroot-devel is moderated
  MAINTAINERS: add linux-api for review of API/ABI changes
  mm/kmemleak-test.c: use pr_fmt for logging
  fs/dlm/debug_fs.c: replace seq_printf by seq_puts
  fs/dlm/lockspace.c: convert simple_str to kstr
  fs/dlm/config.c: convert simple_str to kstr
  mm: mark remap_file_pages() syscall as deprecated
  mm: memcontrol: remove unnecessary memcg argument from soft limit functions
  mm: memcontrol: clean up memcg zoneinfo lookup
  mm/memblock.c: call kmemleak directly from memblock_(alloc|free)
  mm/mempool.c: update the kmemleak stack trace for mempool allocations
  lib/radix-tree.c: update the kmemleak stack trace for radix tree allocations
  mm: introduce kmemleak_update_trace()
  mm/kmemleak.c: use %u to print ->checksum
  ...

23 files changed, 204 insertions, 111 deletions

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 819ac51202c0..ccca32264748 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -501,6 +501,16 @@ config DEBUG_VM
 
           If unsure, say N.
 
+config DEBUG_VM_VMACACHE
+        bool "Debug VMA caching"
+        depends on DEBUG_VM
+        help
+          Enable this to turn on VMA caching debug information. Doing so
+          can cause significant overhead, so only enable it in non-production
+          environments.
+
+          If unsure, say N.
+
 config DEBUG_VM_RB
         bool "Debug VM red-black trees"
         depends on DEBUG_VM
@@ -575,8 +585,8 @@ config DEBUG_HIGHMEM
         bool "Highmem debugging"
         depends on DEBUG_KERNEL && HIGHMEM
         help
-          This options enables addition error checking for high memory systems.
-          Disable for production systems.
+          This option enables additional error checking for high memory
+          systems.  Disable for production systems.
 
 config HAVE_DEBUG_STACKOVERFLOW
         bool
@@ -823,11 +833,6 @@ config DEBUG_RT_MUTEXES
          This allows rt mutex semantics violations and rt mutex related
          deadlocks (lockups) to be detected and reported automatically.
 
-config DEBUG_PI_LIST
-        bool
-        default y
-        depends on DEBUG_RT_MUTEXES
-
 config RT_MUTEX_TESTER
         bool "Built-in scriptable tester for rt-mutexes"
         depends on DEBUG_KERNEL && RT_MUTEXES
@@ -1053,6 +1058,16 @@ config DEBUG_LIST
 
           If unsure, say N.
 
+config DEBUG_PI_LIST
+        bool "Debug priority linked list manipulation"
+        depends on DEBUG_KERNEL
+        help
+          Enable this to turn on extended checks in the priority-ordered
+          linked-list (plist) walking routines.  This checks the entire
+          list multiple times during each manipulation.
+
+          If unsure, say N.
+
 config DEBUG_SG
         bool "Debug SG table operations"
         depends on DEBUG_KERNEL
diff --git a/lib/Makefile b/lib/Makefile
index 0cd7b68e1382..74a32dc49a93 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -148,7 +148,8 @@ obj-$(CONFIG_GENERIC_NET_UTILS) += net_utils.o
 
 obj-$(CONFIG_STMP_DEVICE) += stmp_device.o
 
-libfdt_files = fdt.o fdt_ro.o fdt_wip.o fdt_rw.o fdt_sw.o fdt_strerror.o
+libfdt_files = fdt.o fdt_ro.o fdt_wip.o fdt_rw.o fdt_sw.o fdt_strerror.o \
+               fdt_empty_tree.o
 $(foreach file, $(libfdt_files), \
         $(eval CFLAGS_$(file) = -I$(src)/../scripts/dtc/libfdt))
 lib-$(CONFIG_LIBFDT) += $(libfdt_files)
diff --git a/lib/asn1_decoder.c b/lib/asn1_decoder.c
index 11b9b01fda6b..1a000bb050f9 100644
--- a/lib/asn1_decoder.c
+++ b/lib/asn1_decoder.c
@@ -140,7 +140,7 @@ error:
  * @decoder: The decoder definition (produced by asn1_compiler)
  * @context: The caller's context (to be passed to the action functions)
  * @data: The encoded data
- * @datasize: The size of the encoded data
+ * @datalen: The size of the encoded data
  *
  * Decode BER/DER/CER encoded ASN.1 data according to a bytecode pattern
  * produced by asn1_compiler.  Action functions are called on marked tags to
diff --git a/lib/atomic64_test.c b/lib/atomic64_test.c
index 00bca223d1e1..0211d30d8c39 100644
--- a/lib/atomic64_test.c
+++ b/lib/atomic64_test.c
@@ -8,6 +8,9 @@
  * the Free Software Foundation; either version 2 of the License, or
  * (at your option) any later version.
  */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
 #include <linux/init.h>
 #include <linux/bug.h>
 #include <linux/kernel.h>
@@ -146,18 +149,18 @@ static __init int test_atomic64(void)
         BUG_ON(v.counter != r);
 
 #ifdef CONFIG_X86
-        printk(KERN_INFO "atomic64 test passed for %s platform %s CX8 and %s SSE\n",
+        pr_info("passed for %s platform %s CX8 and %s SSE\n",
 #ifdef CONFIG_X86_64
-               "x86-64",
+                "x86-64",
 #elif defined(CONFIG_X86_CMPXCHG64)
-               "i586+",
+                "i586+",
 #else
-               "i386+",
+                "i386+",
 #endif
                boot_cpu_has(X86_FEATURE_CX8) ? "with" : "without",
                boot_cpu_has(X86_FEATURE_XMM) ? "with" : "without");
 #else
-        printk(KERN_INFO "atomic64 test passed\n");
+        pr_info("passed\n");
 #endif
 
         return 0;
diff --git a/lib/btree.c b/lib/btree.c
index f9a484676cb6..4264871ea1a0 100644
--- a/lib/btree.c
+++ b/lib/btree.c
@@ -198,6 +198,7 @@ EXPORT_SYMBOL_GPL(btree_init);
 
 void btree_destroy(struct btree_head *head)
 {
+        mempool_free(head->node, head->mempool);
         mempool_destroy(head->mempool);
         head->mempool = NULL;
 }
diff --git a/lib/bug.c b/lib/bug.c
index 168603477f02..d1d7c7878900 100644
--- a/lib/bug.c
+++ b/lib/bug.c
@@ -37,6 +37,9 @@
 
     Jeremy Fitzhardinge <jeremy@goop.org> 2006
  */
+
+#define pr_fmt(fmt) fmt
+
 #include <linux/list.h>
 #include <linux/module.h>
 #include <linux/kernel.h>
@@ -153,15 +156,13 @@ enum bug_trap_type report_bug(unsigned long bugaddr, struct pt_regs *regs)
 
         if (warning) {
                 /* this is a WARN_ON rather than BUG/BUG_ON */
-                printk(KERN_WARNING "------------[ cut here ]------------\n");
+                pr_warn("------------[ cut here ]------------\n");
 
                 if (file)
-                        printk(KERN_WARNING "WARNING: at %s:%u\n",
-                               file, line);
+                        pr_warn("WARNING: at %s:%u\n", file, line);
                 else
-                        printk(KERN_WARNING "WARNING: at %p "
-                               "[verbose debug info unavailable]\n",
-                               (void *)bugaddr);
+                        pr_warn("WARNING: at %p [verbose debug info unavailable]\n",
+                                (void *)bugaddr);
 
                 print_modules();
                 show_regs(regs);
@@ -174,12 +175,10 @@ enum bug_trap_type report_bug(unsigned long bugaddr, struct pt_regs *regs)
         printk(KERN_DEFAULT "------------[ cut here ]------------\n");
 
         if (file)
-                printk(KERN_CRIT "kernel BUG at %s:%u!\n",
-                       file, line);
+                pr_crit("kernel BUG at %s:%u!\n", file, line);
         else
-                printk(KERN_CRIT "Kernel BUG at %p "
-                       "[verbose debug info unavailable]\n",
-                       (void *)bugaddr);
+                pr_crit("Kernel BUG at %p [verbose debug info unavailable]\n",
+                        (void *)bugaddr);
 
         return BUG_TRAP_TYPE_BUG;
 }
diff --git a/lib/crc32.c b/lib/crc32.c
index 70f00ca5ef1e..21a7b2135af6 100644
--- a/lib/crc32.c
+++ b/lib/crc32.c
@@ -33,13 +33,13 @@
 #include "crc32defs.h"
 
 #if CRC_LE_BITS > 8
-# define tole(x) ((__force u32) __constant_cpu_to_le32(x))
+# define tole(x) ((__force u32) cpu_to_le32(x))
 #else
 # define tole(x) (x)
 #endif
 
 #if CRC_BE_BITS > 8
-# define tobe(x) ((__force u32) __constant_cpu_to_be32(x))
+# define tobe(x) ((__force u32) cpu_to_be32(x))
 #else
 # define tobe(x) (x)
 #endif
diff --git a/lib/debugobjects.c b/lib/debugobjects.c
index e0731c3db706..547f7f923dbc 100644
--- a/lib/debugobjects.c
+++ b/lib/debugobjects.c
@@ -7,6 +7,9 @@
  *
  * For licencing details see kernel-base/COPYING
  */
+
+#define pr_fmt(fmt) "ODEBUG: " fmt
+
 #include <linux/debugobjects.h>
 #include <linux/interrupt.h>
 #include <linux/sched.h>
@@ -218,7 +221,7 @@ static void debug_objects_oom(void)
         unsigned long flags;
         int i;
 
-        printk(KERN_WARNING "ODEBUG: Out of memory. ODEBUG disabled\n");
+        pr_warn("Out of memory. ODEBUG disabled\n");
 
         for (i = 0; i < ODEBUG_HASH_SIZE; i++, db++) {
                 raw_spin_lock_irqsave(&db->lock, flags);
@@ -292,11 +295,9 @@ static void debug_object_is_on_stack(void *addr, int onstack)
 
         limit++;
         if (is_on_stack)
-                printk(KERN_WARNING
-                       "ODEBUG: object is on stack, but not annotated\n");
+                pr_warn("object is on stack, but not annotated\n");
         else
-                printk(KERN_WARNING
-                       "ODEBUG: object is not on stack, but annotated\n");
+                pr_warn("object is not on stack, but annotated\n");
         WARN_ON(1);
 }
 
@@ -985,7 +986,7 @@ static void __init debug_objects_selftest(void)
         if (check_results(&obj, ODEBUG_STATE_NONE, ++fixups, ++warnings))
                 goto out;
 #endif
-        printk(KERN_INFO "ODEBUG: selftest passed\n");
+        pr_info("selftest passed\n");
 
 out:
         debug_objects_fixups = oldfixups;
@@ -1060,8 +1061,8 @@ static int __init debug_objects_replace_static_objects(void)
         }
         local_irq_enable();
 
-        printk(KERN_DEBUG "ODEBUG: %d of %d active objects replaced\n", cnt,
-               obj_pool_used);
+        pr_debug("%d of %d active objects replaced\n",
+                 cnt, obj_pool_used);
         return 0;
 free:
         hlist_for_each_entry_safe(obj, tmp, &objects, node) {
@@ -1090,7 +1091,7 @@ void __init debug_objects_mem_init(void)
                 debug_objects_enabled = 0;
                 if (obj_cache)
                         kmem_cache_destroy(obj_cache);
-                printk(KERN_WARNING "ODEBUG: out of memory.\n");
+                pr_warn("out of memory.\n");
         } else
                 debug_objects_selftest();
 }
diff --git a/lib/devres.c b/lib/devres.c
index 2f16c133fd36..f562bf6ff71d 100644
--- a/lib/devres.c
+++ b/lib/devres.c
@@ -157,12 +157,12 @@ EXPORT_SYMBOL(devm_ioremap_resource);
  *      if (!base)
  *              return -EADDRNOTAVAIL;
  */
-void __iomem *devm_request_and_ioremap(struct device *device,
+void __iomem *devm_request_and_ioremap(struct device *dev,
                                        struct resource *res)
 {
         void __iomem *dest_ptr;
 
-        dest_ptr = devm_ioremap_resource(device, res);
+        dest_ptr = devm_ioremap_resource(dev, res);
         if (IS_ERR(dest_ptr))
                 return NULL;
 
@@ -194,7 +194,7 @@ static int devm_ioport_map_match(struct device *dev, void *res,
  * Managed ioport_map().  Map is automatically unmapped on driver
  * detach.
  */
-void __iomem * devm_ioport_map(struct device *dev, unsigned long port,
+void __iomem *devm_ioport_map(struct device *dev, unsigned long port,
                                unsigned int nr)
 {
         void __iomem **ptr, *addr;
@@ -265,7 +265,7 @@ static void pcim_iomap_release(struct device *gendev, void *res)
  * be safely called without context and guaranteed to succed once
  * allocated.
  */
-void __iomem * const * pcim_iomap_table(struct pci_dev *pdev)
+void __iomem * const *pcim_iomap_table(struct pci_dev *pdev)
 {
         struct pcim_iomap_devres *dr, *new_dr;
 
@@ -290,7 +290,7 @@ EXPORT_SYMBOL(pcim_iomap_table);
  * Managed pci_iomap().  Map is automatically unmapped on driver
  * detach.
  */
-void __iomem * pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen)
+void __iomem *pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen)
 {
         void __iomem **tbl;
 
diff --git a/lib/digsig.c b/lib/digsig.c
index 8793aeda30ca..ae05ea393fc8 100644
--- a/lib/digsig.c
+++ b/lib/digsig.c
@@ -175,10 +175,11 @@ err1:
  * digsig_verify() - digital signature verification with public key
  * @keyring:    keyring to search key in
  * @sig:        digital signature
- * @sigen:      length of the signature
+ * @siglen:     length of the signature
  * @data:       data
  * @datalen:    length of the data
- * @return:     0 on success, -EINVAL otherwise
+ *
+ * Returns 0 on success, -EINVAL otherwise
  *
  * Verifies data integrity against digital signature.
  * Currently only RSA is supported.
diff --git a/lib/fdt_empty_tree.c b/lib/fdt_empty_tree.c
new file mode 100644
index 000000000000..5d30c58150ad
--- /dev/null
+++ b/lib/fdt_empty_tree.c
@@ -0,0 +1,2 @@
+#include <linux/libfdt_env.h>
+#include "../scripts/dtc/libfdt/fdt_empty_tree.c"
diff --git a/lib/idr.c b/lib/idr.c
index 2642fa8e424d..39158abebad1 100644
--- a/lib/idr.c
+++ b/lib/idr.c
@@ -18,12 +18,6 @@
  * pointer or what ever, we treat it as a (void *).  You can pass this
  * id to a user for him to pass back at a later time.  You then pass
  * that id to this code and it returns your pointer.
-
- * You can release ids at any time. When all ids are released, most of
- * the memory is returned (we keep MAX_IDR_FREE) in a local pool so we
- * don't need to go to the memory "store" during an id allocate, just
- * so you don't need to be too concerned about locking and conflicts
- * with the slab allocator.
  */
 
 #ifndef TEST                        // to test in user space...
@@ -151,7 +145,7 @@ static void idr_layer_rcu_free(struct rcu_head *head)
 
 static inline void free_layer(struct idr *idr, struct idr_layer *p)
 {
-        if (idr->hint && idr->hint == p)
+        if (idr->hint == p)
                 RCU_INIT_POINTER(idr->hint, NULL);
         call_rcu(&p->rcu_head, idr_layer_rcu_free);
 }
@@ -249,7 +243,7 @@ static int sub_alloc(struct idr *idp, int *starting_id, struct idr_layer **pa,
                         id = (id | ((1 << (IDR_BITS * l)) - 1)) + 1;
 
                         /* if already at the top layer, we need to grow */
-                        if (id >= 1 << (idp->layers * IDR_BITS)) {
+                        if (id > idr_max(idp->layers)) {
                                 *starting_id = id;
                                 return -EAGAIN;
                         }
@@ -562,6 +556,11 @@ void idr_remove(struct idr *idp, int id)
         if (id < 0)
                 return;
 
+        if (id > idr_max(idp->layers)) {
+                idr_remove_warning(id);
+                return;
+        }
+
         sub_remove(idp, (idp->layers - 1) * IDR_BITS, id);
         if (idp->top && idp->top->count == 1 && (idp->layers > 1) &&
             idp->top->ary[0]) {
@@ -579,16 +578,6 @@ void idr_remove(struct idr *idp, int id)
                 bitmap_clear(to_free->bitmap, 0, IDR_SIZE);
                 free_layer(idp, to_free);
         }
-        while (idp->id_free_cnt >= MAX_IDR_FREE) {
-                p = get_from_free_list(idp);
-                /*
-                 * Note: we don't call the rcu callback here, since the only
-                 * layers that fall into the freelist are those that have been
-                 * preallocated.
-                 */
-                kmem_cache_free(idr_layer_cache, p);
-        }
-        return;
 }
 EXPORT_SYMBOL(idr_remove);
 
@@ -809,14 +798,12 @@ void *idr_replace(struct idr *idp, void *ptr, int id)
 
         p = idp->top;
         if (!p)
-                return ERR_PTR(-EINVAL);
-
-        n = (p->layer+1) * IDR_BITS;
+                return ERR_PTR(-ENOENT);
 
-        if (id >= (1 << n))
-                return ERR_PTR(-EINVAL);
+        if (id > idr_max(p->layer + 1))
+                return ERR_PTR(-ENOENT);
 
-        n -= IDR_BITS;
+        n = p->layer * IDR_BITS;
         while ((n > 0) && p) {
                 p = p->ary[(id >> n) & IDR_MASK];
                 n -= IDR_BITS;
@@ -1027,6 +1014,9 @@ void ida_remove(struct ida *ida, int id)
         int n;
         struct ida_bitmap *bitmap;
 
+        if (idr_id > idr_max(ida->idr.layers))
+                goto err;
+
         /* clear full bits while looking up the leaf idr_layer */
         while ((shift > 0) && p) {
                 n = (idr_id >> shift) & IDR_MASK;
@@ -1042,7 +1032,7 @@ void ida_remove(struct ida *ida, int id)
         __clear_bit(n, p->bitmap);
 
         bitmap = (void *)p->ary[n];
-        if (!test_bit(offset, bitmap->bitmap))
+        if (!bitmap || !test_bit(offset, bitmap->bitmap))
                 goto err;
 
         /* update bitmap and remove it if empty */
diff --git a/lib/kobject_uevent.c b/lib/kobject_uevent.c
index 4e3bd71bd949..9ebf9e20de53 100644
--- a/lib/kobject_uevent.c
+++ b/lib/kobject_uevent.c
@@ -29,7 +29,9 @@
 
 
 u64 uevent_seqnum;
+#ifdef CONFIG_UEVENT_HELPER
 char uevent_helper[UEVENT_HELPER_PATH_LEN] = CONFIG_UEVENT_HELPER_PATH;
+#endif
 #ifdef CONFIG_NET
 struct uevent_sock {
         struct list_head list;
@@ -109,6 +111,7 @@ static int kobj_bcast_filter(struct sock *dsk, struct sk_buff *skb, void *data)
 }
 #endif
 
+#ifdef CONFIG_UEVENT_HELPER
 static int kobj_usermode_filter(struct kobject *kobj)
 {
         const struct kobj_ns_type_operations *ops;
@@ -147,6 +150,7 @@ static void cleanup_uevent_env(struct subprocess_info *info)
 {
         kfree(info->data);
 }
+#endif
 
 /**
  * kobject_uevent_env - send an uevent with environmental data
@@ -323,6 +327,7 @@ int kobject_uevent_env(struct kobject *kobj, enum kobject_action action,
 #endif
         mutex_unlock(&uevent_sock_mutex);
 
+#ifdef CONFIG_UEVENT_HELPER
         /* call uevent_helper, usually only enabled during early boot */
         if (uevent_helper[0] && !kobj_usermode_filter(kobj)) {
                 struct subprocess_info *info;
@@ -347,6 +352,7 @@ int kobject_uevent_env(struct kobject *kobj, enum kobject_action action,
                         env = NULL;     /* freed by cleanup_uevent_env */
                 }
         }
+#endif
 
 exit:
         kfree(devpath);
diff --git a/lib/libcrc32c.c b/lib/libcrc32c.c
index 244f5480c898..b3131f5cf8a2 100644
--- a/lib/libcrc32c.c
+++ b/lib/libcrc32c.c
@@ -62,10 +62,7 @@ EXPORT_SYMBOL(crc32c);
 static int __init libcrc32c_mod_init(void)
 {
         tfm = crypto_alloc_shash("crc32c", 0, 0);
-        if (IS_ERR(tfm))
-                return PTR_ERR(tfm);
-
-        return 0;
+        return PTR_ERR_OR_ZERO(tfm);
 }
 
 static void __exit libcrc32c_mod_fini(void)
diff --git a/lib/nlattr.c b/lib/nlattr.c
index 10ad042d01be..9c3e85ff0a6c 100644
--- a/lib/nlattr.c
+++ b/lib/nlattr.c
@@ -136,6 +136,7 @@ int nla_validate(const struct nlattr *head, int len, int maxtype,
 errout:
         return err;
 }
+EXPORT_SYMBOL(nla_validate);
 
 /**
  * nla_policy_len - Determin the max. length of a policy
@@ -162,6 +163,7 @@ nla_policy_len(const struct nla_policy *p, int n)
 
         return len;
 }
+EXPORT_SYMBOL(nla_policy_len);
 
 /**
  * nla_parse - Parse a stream of attributes into a tb buffer
@@ -208,6 +210,7 @@ int nla_parse(struct nlattr **tb, int maxtype, const struct nlattr *head,
 errout:
         return err;
 }
+EXPORT_SYMBOL(nla_parse);
 
 /**
  * nla_find - Find a specific attribute in a stream of attributes
@@ -228,6 +231,7 @@ struct nlattr *nla_find(const struct nlattr *head, int len, int attrtype)
 
         return NULL;
 }
+EXPORT_SYMBOL(nla_find);
 
 /**
  * nla_strlcpy - Copy string attribute payload into a sized buffer
@@ -258,6 +262,7 @@ size_t nla_strlcpy(char *dst, const struct nlattr *nla, size_t dstsize)
 
         return srclen;
 }
+EXPORT_SYMBOL(nla_strlcpy);
 
 /**
  * nla_memcpy - Copy a netlink attribute into another memory area
@@ -278,6 +283,7 @@ int nla_memcpy(void *dest, const struct nlattr *src, int count)
 
         return minlen;
 }
+EXPORT_SYMBOL(nla_memcpy);
 
 /**
  * nla_memcmp - Compare an attribute with sized memory area
@@ -295,6 +301,7 @@ int nla_memcmp(const struct nlattr *nla, const void *data,
 
         return d;
 }
+EXPORT_SYMBOL(nla_memcmp);
 
 /**
  * nla_strcmp - Compare a string attribute against a string
@@ -317,6 +324,7 @@ int nla_strcmp(const struct nlattr *nla, const char *str)
 
         return d;
 }
+EXPORT_SYMBOL(nla_strcmp);
 
 #ifdef CONFIG_NET
 /**
@@ -502,12 +510,3 @@ int nla_append(struct sk_buff *skb, int attrlen, const void *data)
 }
 EXPORT_SYMBOL(nla_append);
 #endif
-
-EXPORT_SYMBOL(nla_validate);
-EXPORT_SYMBOL(nla_policy_len);
-EXPORT_SYMBOL(nla_parse);
-EXPORT_SYMBOL(nla_find);
-EXPORT_SYMBOL(nla_strlcpy);
-EXPORT_SYMBOL(nla_memcpy);
-EXPORT_SYMBOL(nla_memcmp);
-EXPORT_SYMBOL(nla_strcmp);
diff --git a/lib/plist.c b/lib/plist.c
index 1ebc95f7a46f..d408e774b746 100644
--- a/lib/plist.c
+++ b/lib/plist.c
@@ -134,6 +134,46 @@ void plist_del(struct plist_node *node, struct plist_head *head)
         plist_check_head(head);
 }
 
+/**
+ * plist_requeue - Requeue @node at end of same-prio entries.
+ *
+ * This is essentially an optimized plist_del() followed by
+ * plist_add().  It moves an entry already in the plist to
+ * after any other same-priority entries.
+ *
+ * @node:       &struct plist_node pointer - entry to be moved
+ * @head:       &struct plist_head pointer - list head
+ */
+void plist_requeue(struct plist_node *node, struct plist_head *head)
+{
+        struct plist_node *iter;
+        struct list_head *node_next = &head->node_list;
+
+        plist_check_head(head);
+        BUG_ON(plist_head_empty(head));
+        BUG_ON(plist_node_empty(node));
+
+        if (node == plist_last(head))
+                return;
+
+        iter = plist_next(node);
+
+        if (node->prio != iter->prio)
+                return;
+
+        plist_del(node, head);
+
+        plist_for_each_continue(iter, head) {
+                if (node->prio != iter->prio) {
+                        node_next = &iter->node_list;
+                        break;
+                }
+        }
+        list_add_tail(&node->node_list, node_next);
+
+        plist_check_head(head);
+}
+
 #ifdef CONFIG_DEBUG_PI_LIST
 #include <linux/sched.h>
 #include <linux/module.h>
@@ -170,12 +210,20 @@ static void __init plist_test_check(int nr_expect)
         BUG_ON(prio_pos->prio_list.next != &first->prio_list);
 }
 
+static void __init plist_test_requeue(struct plist_node *node)
+{
+        plist_requeue(node, &test_head);
+
+        if (node != plist_last(&test_head))
+                BUG_ON(node->prio == plist_next(node)->prio);
+}
+
 static int  __init plist_test(void)
 {
         int nr_expect = 0, i, loop;
         unsigned int r = local_clock();
 
-        pr_debug("start plist test\n");
+        printk(KERN_DEBUG "start plist test\n");
         plist_head_init(&test_head);
         for (i = 0; i < ARRAY_SIZE(test_node); i++)
                 plist_node_init(test_node + i, 0);
@@ -193,6 +241,10 @@ static int  __init plist_test(void)
                         nr_expect--;
                 }
                 plist_test_check(nr_expect);
+                if (!plist_node_empty(test_node + i)) {
+                        plist_test_requeue(test_node + i);
+                        plist_test_check(nr_expect);
+                }
         }
 
         for (i = 0; i < ARRAY_SIZE(test_node); i++) {
@@ -203,7 +255,7 @@ static int  __init plist_test(void)
                 plist_test_check(nr_expect);
         }
 
-        pr_debug("end plist test\n");
+        printk(KERN_DEBUG "end plist test\n");
         return 0;
 }
 
diff --git a/lib/radix-tree.c b/lib/radix-tree.c
index 9599aa72d7a0..3291a8e37490 100644
--- a/lib/radix-tree.c
+++ b/lib/radix-tree.c
@@ -27,6 +27,7 @@
 #include <linux/radix-tree.h>
 #include <linux/percpu.h>
 #include <linux/slab.h>
+#include <linux/kmemleak.h>
 #include <linux/notifier.h>
 #include <linux/cpu.h>
 #include <linux/string.h>
@@ -194,12 +195,17 @@ radix_tree_node_alloc(struct radix_tree_root *root)
                  * succeed in getting a node here (and never reach
                  * kmem_cache_alloc)
                  */
-                rtp = &__get_cpu_var(radix_tree_preloads);
+                rtp = this_cpu_ptr(&radix_tree_preloads);
                 if (rtp->nr) {
                         ret = rtp->nodes[rtp->nr - 1];
                         rtp->nodes[rtp->nr - 1] = NULL;
                         rtp->nr--;
                 }
+                /*
+                 * Update the allocation stack trace as this is more useful
+                 * for debugging.
+                 */
+                kmemleak_update_trace(ret);
         }
         if (ret == NULL)
                 ret = kmem_cache_alloc(radix_tree_node_cachep, gfp_mask);
@@ -250,14 +256,14 @@ static int __radix_tree_preload(gfp_t gfp_mask)
         int ret = -ENOMEM;
 
         preempt_disable();
-        rtp = &__get_cpu_var(radix_tree_preloads);
+        rtp = this_cpu_ptr(&radix_tree_preloads);
         while (rtp->nr < ARRAY_SIZE(rtp->nodes)) {
                 preempt_enable();
                 node = kmem_cache_alloc(radix_tree_node_cachep, gfp_mask);
                 if (node == NULL)
                         goto out;
                 preempt_disable();
-                rtp = &__get_cpu_var(radix_tree_preloads);
+                rtp = this_cpu_ptr(&radix_tree_preloads);
                 if (rtp->nr < ARRAY_SIZE(rtp->nodes))
                         rtp->nodes[rtp->nr++] = node;
                 else
@@ -1296,7 +1302,6 @@ static inline void radix_tree_shrink(struct radix_tree_root *root)
 /**
  *      __radix_tree_delete_node    -    try to free node after clearing a slot
  *      @root:          radix tree root
- *      @index:         index key
  *      @node:          node containing @index
  *
  *      After clearing the slot at @index in @node from radix tree
diff --git a/lib/string.c b/lib/string.c
index 9b1f9062a202..992bf30af759 100644
--- a/lib/string.c
+++ b/lib/string.c
@@ -107,7 +107,7 @@ EXPORT_SYMBOL(strcpy);
 
 #ifndef __HAVE_ARCH_STRNCPY
 /**
- * strncpy - Copy a length-limited, %NUL-terminated string
+ * strncpy - Copy a length-limited, C-string
  * @dest: Where to copy the string to
  * @src: Where to copy the string from
  * @count: The maximum number of bytes to copy
@@ -136,7 +136,7 @@ EXPORT_SYMBOL(strncpy);
 
 #ifndef __HAVE_ARCH_STRLCPY
 /**
- * strlcpy - Copy a %NUL terminated string into a sized buffer
+ * strlcpy - Copy a C-string into a sized buffer
  * @dest: Where to copy the string to
  * @src: Where to copy the string from
  * @size: size of destination buffer
@@ -182,7 +182,7 @@ EXPORT_SYMBOL(strcat);
 
 #ifndef __HAVE_ARCH_STRNCAT
 /**
- * strncat - Append a length-limited, %NUL-terminated string to another
+ * strncat - Append a length-limited, C-string to another
  * @dest: The string to be appended to
  * @src: The string to append to it
  * @count: The maximum numbers of bytes to copy
@@ -211,7 +211,7 @@ EXPORT_SYMBOL(strncat);
 
 #ifndef __HAVE_ARCH_STRLCAT
 /**
- * strlcat - Append a length-limited, %NUL-terminated string to another
+ * strlcat - Append a length-limited, C-string to another
  * @dest: The string to be appended to
  * @src: The string to append to it
  * @count: The size of the destination buffer.
@@ -301,6 +301,24 @@ char *strchr(const char *s, int c)
 EXPORT_SYMBOL(strchr);
 #endif
 
+#ifndef __HAVE_ARCH_STRCHRNUL
+/**
+ * strchrnul - Find and return a character in a string, or end of string
+ * @s: The string to be searched
+ * @c: The character to search for
+ *
+ * Returns pointer to first occurrence of 'c' in s. If c is not found, then
+ * return a pointer to the null byte at the end of s.
+ */
+char *strchrnul(const char *s, int c)
+{
+        while (*s && *s != (char)c)
+                s++;
+        return (char *)s;
+}
+EXPORT_SYMBOL(strchrnul);
+#endif
+
 #ifndef __HAVE_ARCH_STRRCHR
 /**
  * strrchr - Find the last occurrence of a character in a string
diff --git a/lib/swiotlb.c b/lib/swiotlb.c
index b604b831f4d1..649d097853a1 100644
--- a/lib/swiotlb.c
+++ b/lib/swiotlb.c
@@ -374,7 +374,7 @@ void __init swiotlb_free(void)
         io_tlb_nslabs = 0;
 }
 
-static int is_swiotlb_buffer(phys_addr_t paddr)
+int is_swiotlb_buffer(phys_addr_t paddr)
 {
         return paddr >= io_tlb_start && paddr < io_tlb_end;
 }
diff --git a/lib/textsearch.c b/lib/textsearch.c
index e0cc0146ae62..0c7e9ab2d88f 100644
--- a/lib/textsearch.c
+++ b/lib/textsearch.c
@@ -159,6 +159,7 @@ errout:
         spin_unlock(&ts_mod_lock);
         return err;
 }
+EXPORT_SYMBOL(textsearch_register);
 
 /**
  * textsearch_unregister - unregister a textsearch module
@@ -190,6 +191,7 @@ out:
         spin_unlock(&ts_mod_lock);
         return err;
 }
+EXPORT_SYMBOL(textsearch_unregister);
 
 struct ts_linear_state
 {
@@ -236,6 +238,7 @@ unsigned int textsearch_find_continuous(struct ts_config *conf,
 
         return textsearch_find(conf, state);
 }
+EXPORT_SYMBOL(textsearch_find_continuous);
 
 /**
  * textsearch_prepare - Prepare a search
@@ -298,6 +301,7 @@ errout:
                 
         return ERR_PTR(err);
 }
+EXPORT_SYMBOL(textsearch_prepare);
 
 /**
  * textsearch_destroy - destroy a search configuration
@@ -316,9 +320,4 @@ void textsearch_destroy(struct ts_config *conf)
 
         kfree(conf);
 }
-
-EXPORT_SYMBOL(textsearch_register);
-EXPORT_SYMBOL(textsearch_unregister);
-EXPORT_SYMBOL(textsearch_prepare);
-EXPORT_SYMBOL(textsearch_find_continuous);
 EXPORT_SYMBOL(textsearch_destroy);
diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index 0648291cdafe..6fe2c84eb055 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -2347,7 +2347,7 @@ int vsscanf(const char *buf, const char *fmt, va_list args)
                         break;
 
                 base = 10;
-                is_sign = 0;
+                is_sign = false;
 
                 switch (*fmt++) {
                 case 'c':
@@ -2386,7 +2386,7 @@ int vsscanf(const char *buf, const char *fmt, va_list args)
                 case 'i':
                         base = 0;
                 case 'd':
-                        is_sign = 1;
+                        is_sign = true;
                 case 'u':
                         break;
                 case '%':
diff --git a/lib/xz/Kconfig b/lib/xz/Kconfig
index 08837db52d94..12d2d777f36b 100644
--- a/lib/xz/Kconfig
+++ b/lib/xz/Kconfig
@@ -9,33 +9,33 @@ config XZ_DEC
 if XZ_DEC
 
 config XZ_DEC_X86
-        bool "x86 BCJ filter decoder"
-        default y if X86
+        bool "x86 BCJ filter decoder" if EXPERT
+        default y
         select XZ_DEC_BCJ
 
 config XZ_DEC_POWERPC
-        bool "PowerPC BCJ filter decoder"
-        default y if PPC
+        bool "PowerPC BCJ filter decoder" if EXPERT
+        default y
         select XZ_DEC_BCJ
 
 config XZ_DEC_IA64
-        bool "IA-64 BCJ filter decoder"
-        default y if IA64
+        bool "IA-64 BCJ filter decoder" if EXPERT
+        default y
         select XZ_DEC_BCJ
 
 config XZ_DEC_ARM
-        bool "ARM BCJ filter decoder"
-        default y if ARM
+        bool "ARM BCJ filter decoder" if EXPERT
+        default y
         select XZ_DEC_BCJ
 
 config XZ_DEC_ARMTHUMB
-        bool "ARM-Thumb BCJ filter decoder"
-        default y if (ARM && ARM_THUMB)
+        bool "ARM-Thumb BCJ filter decoder" if EXPERT
+        default y
         select XZ_DEC_BCJ
 
 config XZ_DEC_SPARC
-        bool "SPARC BCJ filter decoder"
-        default y if SPARC
+        bool "SPARC BCJ filter decoder" if EXPERT
+        default y
         select XZ_DEC_BCJ
 
 endif
diff --git a/lib/xz/xz_dec_lzma2.c b/lib/xz/xz_dec_lzma2.c
index a6cdc969ea42..08c3c8049998 100644
--- a/lib/xz/xz_dec_lzma2.c
+++ b/lib/xz/xz_dec_lzma2.c
@@ -1043,6 +1043,8 @@ XZ_EXTERN enum xz_ret xz_dec_lzma2_run(struct xz_dec_lzma2 *s,
 
                         s->lzma2.sequence = SEQ_LZMA_PREPARE;
 
+                /* Fall through */
+
                 case SEQ_LZMA_PREPARE:
                         if (s->lzma2.compressed < RC_INIT_BYTES)
                                 return XZ_DATA_ERROR;
@@ -1053,6 +1055,8 @@ XZ_EXTERN enum xz_ret xz_dec_lzma2_run(struct xz_dec_lzma2 *s,
                         s->lzma2.compressed -= RC_INIT_BYTES;
                         s->lzma2.sequence = SEQ_LZMA_RUN;
 
+                /* Fall through */
+
                 case SEQ_LZMA_RUN:
                         /*
                          * Set dictionary limit to indicate how much we want