8 files changed, 149 insertions, 63 deletions

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..7dd5c0e9d996 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.
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;