Merge branch 'linux-2.6' into for-linus

12 files changed, 226 insertions, 70 deletions

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 77491e311791..d3679103a8e4 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -341,7 +341,7 @@ config FRAME_POINTER
 
 config UNWIND_INFO
         bool "Compile the kernel with frame unwind information"
-        depends on !IA64 && !PARISC
+        depends on !IA64 && !PARISC && !ARM
         depends on !MODULES || !(MIPS || PPC || SUPERH || V850)
         help
           If you say Y here the resulting kernel image will be slightly larger
diff --git a/lib/Makefile b/lib/Makefile
index 59070dbfbeb4..cf98fabaa549 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -5,14 +5,14 @@
 lib-y := ctype.o string.o vsprintf.o cmdline.o \
          bust_spinlocks.o rbtree.o radix-tree.o dump_stack.o \
          idr.o div64.o int_sqrt.o bitmap.o extable.o prio_tree.o \
-         sha1.o irq_regs.o carta_random32.o
+         sha1.o irq_regs.o
 
 lib-$(CONFIG_MMU) += ioremap.o
 lib-$(CONFIG_SMP) += cpumask.o
 
 lib-y   += kobject.o kref.o kobject_uevent.o klist.o
 
-obj-y += sort.o parser.o halfmd4.o iomap_copy.o debug_locks.o
+obj-y += sort.o parser.o halfmd4.o iomap_copy.o debug_locks.o random32.o
 
 ifeq ($(CONFIG_DEBUG_KOBJECT),y)
 CFLAGS_kobject.o += -DDEBUG
diff --git a/lib/carta_random32.c b/lib/carta_random32.c
deleted file mode 100644
index ca82df70eee4..000000000000
--- a/lib/carta_random32.c
+++ /dev/null
@@ -1,41 +0,0 @@
-/*
- * Copyright (c) 2002-2006 Hewlett-Packard Development Company, L.P.
- *      Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of version 2 of the GNU General Public
- * License 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/types.h>
-#include <linux/module.h>
-
-/*
- * Fast, simple, yet decent quality random number generator based on
- * a paper by David G. Carta ("Two Fast Implementations of the
- * `Minimal Standard' Random Number Generator," Communications of the
- * ACM, January, 1990).
- */
-u64 carta_random32 (u64 seed)
-{
-#       define A 16807
-#       define M ((u32) 1 << 31)
-        u64 s, prod = A * seed, p, q;
-
-        p = (prod >> 31) & (M - 1);
-        q = (prod >>  0) & (M - 1);
-        s = p + q;
-        if (s >= M)
-                s -= M - 1;
-        return s;
-}
-EXPORT_SYMBOL_GPL(carta_random32);
diff --git a/lib/cpumask.c b/lib/cpumask.c
index 7a2a73f88d59..3a67dc5ada7d 100644
--- a/lib/cpumask.c
+++ b/lib/cpumask.c
@@ -43,19 +43,3 @@ int __any_online_cpu(const cpumask_t *mask)
         return cpu;
 }
 EXPORT_SYMBOL(__any_online_cpu);
-
-#if MAX_NUMNODES > 1
-/*
- * Find the highest possible node id.
- */
-int highest_possible_node_id(void)
-{
-        unsigned int node;
-        unsigned int highest = 0;
-
-        for_each_node_mask(node, node_possible_map)
-                highest = node;
-        return highest;
-}
-EXPORT_SYMBOL(highest_possible_node_id);
-#endif
diff --git a/lib/kobject.c b/lib/kobject.c
index 1699eb9161f3..744a4b102c7f 100644
--- a/lib/kobject.c
+++ b/lib/kobject.c
@@ -119,6 +119,7 @@ char *kobject_get_path(struct kobject *kobj, gfp_t gfp_mask)
 
         return path;
 }
+EXPORT_SYMBOL_GPL(kobject_get_path);
 
 /**
  *      kobject_init - initialize object.
@@ -310,6 +311,56 @@ int kobject_rename(struct kobject * kobj, const char *new_name)
 }
 
 /**
+ *      kobject_move - move object to another parent
+ *      @kobj:  object in question.
+ *      @new_parent: object's new parent
+ */
+
+int kobject_move(struct kobject *kobj, struct kobject *new_parent)
+{
+        int error;
+        struct kobject *old_parent;
+        const char *devpath = NULL;
+        char *devpath_string = NULL;
+        char *envp[2];
+
+        kobj = kobject_get(kobj);
+        if (!kobj)
+                return -EINVAL;
+        new_parent = kobject_get(new_parent);
+        if (!new_parent) {
+                error = -EINVAL;
+                goto out;
+        }
+        /* old object path */
+        devpath = kobject_get_path(kobj, GFP_KERNEL);
+        if (!devpath) {
+                error = -ENOMEM;
+                goto out;
+        }
+        devpath_string = kmalloc(strlen(devpath) + 15, GFP_KERNEL);
+        if (!devpath_string) {
+                error = -ENOMEM;
+                goto out;
+        }
+        sprintf(devpath_string, "DEVPATH_OLD=%s", devpath);
+        envp[0] = devpath_string;
+        envp[1] = NULL;
+        error = sysfs_move_dir(kobj, new_parent);
+        if (error)
+                goto out;
+        old_parent = kobj->parent;
+        kobj->parent = new_parent;
+        kobject_put(old_parent);
+        kobject_uevent_env(kobj, KOBJ_MOVE, envp);
+out:
+        kobject_put(kobj);
+        kfree(devpath_string);
+        kfree(devpath);
+        return error;
+}
+
+/**
  *      kobject_del - unlink kobject from hierarchy.
  *      @kobj:  object.
  */
diff --git a/lib/kobject_uevent.c b/lib/kobject_uevent.c
index 7f20e7b857cb..a1922765ff31 100644
--- a/lib/kobject_uevent.c
+++ b/lib/kobject_uevent.c
@@ -50,18 +50,22 @@ static char *action_to_string(enum kobject_action action)
                 return "offline";
         case KOBJ_ONLINE:
                 return "online";
+        case KOBJ_MOVE:
+                return "move";
         default:
                 return NULL;
         }
 }
 
 /**
- * kobject_uevent - notify userspace by ending an uevent
+ * kobject_uevent_env - send an uevent with environmental data
  *
- * @action: action that is happening (usually KOBJ_ADD and KOBJ_REMOVE)
+ * @action: action that is happening (usually KOBJ_MOVE)
  * @kobj: struct kobject that the action is happening to
+ * @envp_ext: pointer to environmental data
  */
-void kobject_uevent(struct kobject *kobj, enum kobject_action action)
+void kobject_uevent_env(struct kobject *kobj, enum kobject_action action,
+                        char *envp_ext[])
 {
         char **envp;
         char *buffer;
@@ -76,6 +80,7 @@ void kobject_uevent(struct kobject *kobj, enum kobject_action action)
         char *seq_buff;
         int i = 0;
         int retval;
+        int j;
 
         pr_debug("%s\n", __FUNCTION__);
 
@@ -134,7 +139,8 @@ void kobject_uevent(struct kobject *kobj, enum kobject_action action)
         scratch += sprintf (scratch, "DEVPATH=%s", devpath) + 1;
         envp [i++] = scratch;
         scratch += sprintf(scratch, "SUBSYSTEM=%s", subsystem) + 1;
-
+        for (j = 0; envp_ext && envp_ext[j]; j++)
+                envp[i++] = envp_ext[j];
         /* just reserve the space, overwrite it after kset call has returned */
         envp[i++] = seq_buff = scratch;
         scratch += strlen("SEQNUM=18446744073709551616") + 1;
@@ -200,6 +206,20 @@ exit:
         kfree(envp);
         return;
 }
+
+EXPORT_SYMBOL_GPL(kobject_uevent_env);
+
+/**
+ * kobject_uevent - notify userspace by ending an uevent
+ *
+ * @action: action that is happening (usually KOBJ_ADD and KOBJ_REMOVE)
+ * @kobj: struct kobject that the action is happening to
+ */
+void kobject_uevent(struct kobject *kobj, enum kobject_action action)
+{
+        kobject_uevent_env(kobj, action, NULL);
+}
+
 EXPORT_SYMBOL_GPL(kobject_uevent);
 
 /**
diff --git a/lib/random32.c b/lib/random32.c
new file mode 100644
index 000000000000..4a15ce51cea7
--- /dev/null
+++ b/lib/random32.c
@@ -0,0 +1,142 @@
+/*
+  This is a maximally equidistributed combined Tausworthe generator
+  based on code from GNU Scientific Library 1.5 (30 Jun 2004)
+
+   x_n = (s1_n ^ s2_n ^ s3_n)
+
+   s1_{n+1} = (((s1_n & 4294967294) <<12) ^ (((s1_n <<13) ^ s1_n) >>19))
+   s2_{n+1} = (((s2_n & 4294967288) << 4) ^ (((s2_n << 2) ^ s2_n) >>25))
+   s3_{n+1} = (((s3_n & 4294967280) <<17) ^ (((s3_n << 3) ^ s3_n) >>11))
+
+   The period of this generator is about 2^88.
+
+   From: P. L'Ecuyer, "Maximally Equidistributed Combined Tausworthe
+   Generators", Mathematics of Computation, 65, 213 (1996), 203--213.
+
+   This is available on the net from L'Ecuyer's home page,
+
+   http://www.iro.umontreal.ca/~lecuyer/myftp/papers/tausme.ps
+   ftp://ftp.iro.umontreal.ca/pub/simulation/lecuyer/papers/tausme.ps
+
+   There is an erratum in the paper "Tables of Maximally
+   Equidistributed Combined LFSR Generators", Mathematics of
+   Computation, 68, 225 (1999), 261--269:
+   http://www.iro.umontreal.ca/~lecuyer/myftp/papers/tausme2.ps
+
+        ... the k_j most significant bits of z_j must be non-
+        zero, for each j. (Note: this restriction also applies to the
+        computer code given in [4], but was mistakenly not mentioned in
+        that paper.)
+
+   This affects the seeding procedure by imposing the requirement
+   s1 > 1, s2 > 7, s3 > 15.
+
+*/
+
+#include <linux/types.h>
+#include <linux/percpu.h>
+#include <linux/module.h>
+#include <linux/random.h>
+
+struct rnd_state {
+        u32 s1, s2, s3;
+};
+
+static DEFINE_PER_CPU(struct rnd_state, net_rand_state);
+
+static u32 __random32(struct rnd_state *state)
+{
+#define TAUSWORTHE(s,a,b,c,d) ((s&c)<<d) ^ (((s <<a) ^ s)>>b)
+
+        state->s1 = TAUSWORTHE(state->s1, 13, 19, 4294967294UL, 12);
+        state->s2 = TAUSWORTHE(state->s2, 2, 25, 4294967288UL, 4);
+        state->s3 = TAUSWORTHE(state->s3, 3, 11, 4294967280UL, 17);
+
+        return (state->s1 ^ state->s2 ^ state->s3);
+}
+
+static void __set_random32(struct rnd_state *state, unsigned long s)
+{
+        if (s == 0)
+                s = 1;      /* default seed is 1 */
+
+#define LCG(n) (69069 * n)
+        state->s1 = LCG(s);
+        state->s2 = LCG(state->s1);
+        state->s3 = LCG(state->s2);
+
+        /* "warm it up" */
+        __random32(state);
+        __random32(state);
+        __random32(state);
+        __random32(state);
+        __random32(state);
+        __random32(state);
+}
+
+/**
+ *      random32 - pseudo random number generator
+ *
+ *      A 32 bit pseudo-random number is generated using a fast
+ *      algorithm suitable for simulation. This algorithm is NOT
+ *      considered safe for cryptographic use.
+ */
+u32 random32(void)
+{
+        unsigned long r;
+        struct rnd_state *state = &get_cpu_var(net_rand_state);
+        r = __random32(state);
+        put_cpu_var(state);
+        return r;
+}
+EXPORT_SYMBOL(random32);
+
+/**
+ *      srandom32 - add entropy to pseudo random number generator
+ *      @seed: seed value
+ *
+ *      Add some additional seeding to the random32() pool.
+ *      Note: this pool is per cpu so it only affects current CPU.
+ */
+void srandom32(u32 entropy)
+{
+        struct rnd_state *state = &get_cpu_var(net_rand_state);
+        __set_random32(state, state->s1 ^ entropy);
+        put_cpu_var(state);
+}
+EXPORT_SYMBOL(srandom32);
+
+/*
+ *      Generate some initially weak seeding values to allow
+ *      to start the random32() engine.
+ */
+static int __init random32_init(void)
+{
+        int i;
+
+        for_each_possible_cpu(i) {
+                struct rnd_state *state = &per_cpu(net_rand_state,i);
+                __set_random32(state, i + jiffies);
+        }
+        return 0;
+}
+core_initcall(random32_init);
+
+/*
+ *      Generate better values after random number generator
+ *      is fully initalized.
+ */
+static int __init random32_reseed(void)
+{
+        int i;
+        unsigned long seed;
+
+        for_each_possible_cpu(i) {
+                struct rnd_state *state = &per_cpu(net_rand_state,i);
+
+                get_random_bytes(&seed, sizeof(seed));
+                __set_random32(state, seed);
+        }
+        return 0;
+}
+late_initcall(random32_reseed);
diff --git a/lib/rwsem-spinlock.c b/lib/rwsem-spinlock.c
index db4fed74b940..c4cfd6c0342f 100644
--- a/lib/rwsem-spinlock.c
+++ b/lib/rwsem-spinlock.c
@@ -28,7 +28,7 @@ void __init_rwsem(struct rw_semaphore *sem, const char *name,
          * Make sure we are not reinitializing a held semaphore:
          */
         debug_check_no_locks_freed((void *)sem, sizeof(*sem));
-        lockdep_init_map(&sem->dep_map, name, key);
+        lockdep_init_map(&sem->dep_map, name, key, 0);
 #endif
         sem->activity = 0;
         spin_lock_init(&sem->wait_lock);
diff --git a/lib/rwsem.c b/lib/rwsem.c
index 901d0e7da892..cdb4e3d05607 100644
--- a/lib/rwsem.c
+++ b/lib/rwsem.c
@@ -19,7 +19,7 @@ void __init_rwsem(struct rw_semaphore *sem, const char *name,
          * Make sure we are not reinitializing a held semaphore:
          */
         debug_check_no_locks_freed((void *)sem, sizeof(*sem));
-        lockdep_init_map(&sem->dep_map, name, key);
+        lockdep_init_map(&sem->dep_map, name, key, 0);
 #endif
         sem->count = RWSEM_UNLOCKED_VALUE;
         spin_lock_init(&sem->wait_lock);
diff --git a/lib/spinlock_debug.c b/lib/spinlock_debug.c
index dafaf1de2491..b6c4f898197c 100644
--- a/lib/spinlock_debug.c
+++ b/lib/spinlock_debug.c
@@ -20,7 +20,7 @@ void __spin_lock_init(spinlock_t *lock, const char *name,
          * Make sure we are not reinitializing a held lock:
          */
         debug_check_no_locks_freed((void *)lock, sizeof(*lock));
-        lockdep_init_map(&lock->dep_map, name, key);
+        lockdep_init_map(&lock->dep_map, name, key, 0);
 #endif
         lock->raw_lock = (raw_spinlock_t)__RAW_SPIN_LOCK_UNLOCKED;
         lock->magic = SPINLOCK_MAGIC;
@@ -38,7 +38,7 @@ void __rwlock_init(rwlock_t *lock, const char *name,
          * Make sure we are not reinitializing a held lock:
          */
         debug_check_no_locks_freed((void *)lock, sizeof(*lock));
-        lockdep_init_map(&lock->dep_map, name, key);
+        lockdep_init_map(&lock->dep_map, name, key, 0);
 #endif
         lock->raw_lock = (raw_rwlock_t) __RAW_RW_LOCK_UNLOCKED;
         lock->magic = RWLOCK_MAGIC;
diff --git a/lib/string.c b/lib/string.c
index 63077267367e..a485d75962af 100644
--- a/lib/string.c
+++ b/lib/string.c
@@ -320,7 +320,7 @@ char *strstrip(char *s)
                 return s;
 
         end = s + size - 1;
-        while (end != s && isspace(*end))
+        while (end >= s && isspace(*end))
                 end--;
         *(end + 1) = '\0';
 
diff --git a/lib/textsearch.c b/lib/textsearch.c
index 2cb4a437942e..98bcadc01185 100644
--- a/lib/textsearch.c
+++ b/lib/textsearch.c
@@ -40,7 +40,7 @@
  *       configuration according to the specified parameters.
  *   (3) User starts the search(es) by calling _find() or _next() to
  *       fetch subsequent occurrences. A state variable is provided
- *       to the algorihtm to store persistant variables.
+ *       to the algorihtm to store persistent variables.
  *   (4) Core eventually resets the search offset and forwards the find()
  *       request to the algorithm.
  *   (5) Algorithm calls get_next_block() provided by the user continously