Root/target/linux/generic/patches-2.6.32/971-ocf_20110720.patch

1--- a/drivers/char/random.c
2+++ b/drivers/char/random.c
3@@ -129,6 +129,9 @@
4  * unsigned int value);
5  * void add_interrupt_randomness(int irq);
6  *
7+ * void random_input_words(__u32 *buf, size_t wordcount, int ent_count)
8+ * int random_input_wait(void);
9+ *
10  * add_input_randomness() uses the input layer interrupt timing, as well as
11  * the event type information from the hardware.
12  *
13@@ -140,6 +143,13 @@
14  * a better measure, since the timing of the disk interrupts are more
15  * unpredictable.
16  *
17+ * random_input_words() just provides a raw block of entropy to the input
18+ * pool, such as from a hardware entropy generator.
19+ *
20+ * random_input_wait() suspends the caller until such time as the
21+ * entropy pool falls below the write threshold, and returns a count of how
22+ * much entropy (in bits) is needed to sustain the pool.
23+ *
24  * All of these routines try to estimate how many bits of randomness a
25  * particular randomness source. They do this by keeping track of the
26  * first and second order deltas of the event timings.
27@@ -714,6 +724,61 @@ void add_disk_randomness(struct gendisk
28 }
29 #endif
30 
31+/*
32+ * random_input_words - add bulk entropy to pool
33+ *
34+ * @buf: buffer to add
35+ * @wordcount: number of __u32 words to add
36+ * @ent_count: total amount of entropy (in bits) to credit
37+ *
38+ * this provides bulk input of entropy to the input pool
39+ *
40+ */
41+void random_input_words(__u32 *buf, size_t wordcount, int ent_count)
42+{
43+ mix_pool_bytes(&input_pool, buf, wordcount*4);
44+
45+ credit_entropy_bits(&input_pool, ent_count);
46+
47+ DEBUG_ENT("crediting %d bits => %d\n",
48+ ent_count, input_pool.entropy_count);
49+ /*
50+ * Wake up waiting processes if we have enough
51+ * entropy.
52+ */
53+ if (input_pool.entropy_count >= random_read_wakeup_thresh)
54+ wake_up_interruptible(&random_read_wait);
55+}
56+EXPORT_SYMBOL(random_input_words);
57+
58+/*
59+ * random_input_wait - wait until random needs entropy
60+ *
61+ * this function sleeps until the /dev/random subsystem actually
62+ * needs more entropy, and then return the amount of entropy
63+ * that it would be nice to have added to the system.
64+ */
65+int random_input_wait(void)
66+{
67+ int count;
68+
69+ wait_event_interruptible(random_write_wait,
70+ input_pool.entropy_count < random_write_wakeup_thresh);
71+
72+ count = random_write_wakeup_thresh - input_pool.entropy_count;
73+
74+ /* likely we got woken up due to a signal */
75+ if (count <= 0) count = random_read_wakeup_thresh;
76+
77+ DEBUG_ENT("requesting %d bits from input_wait()er %d<%d\n",
78+ count,
79+ input_pool.entropy_count, random_write_wakeup_thresh);
80+
81+ return count;
82+}
83+EXPORT_SYMBOL(random_input_wait);
84+
85+
86 #define EXTRACT_SIZE 10
87 
88 /*********************************************************************
89--- a/fs/fcntl.c
90+++ b/fs/fcntl.c
91@@ -195,6 +195,7 @@ static int setfl(int fd, struct file * f
92  out:
93     return error;
94 }
95+EXPORT_SYMBOL(sys_dup);
96 
97 static void f_modown(struct file *filp, struct pid *pid, enum pid_type type,
98                      int force)
99--- a/include/linux/miscdevice.h
100+++ b/include/linux/miscdevice.h
101@@ -12,6 +12,7 @@
102 #define APOLLO_MOUSE_MINOR 7
103 #define PC110PAD_MINOR 9
104 /*#define ADB_MOUSE_MINOR 10 FIXME OBSOLETE */
105+#define CRYPTODEV_MINOR 70 /* /dev/crypto */
106 #define WATCHDOG_MINOR 130 /* Watchdog timer */
107 #define TEMP_MINOR 131 /* Temperature Sensor */
108 #define RTC_MINOR 135
109--- a/include/linux/random.h
110+++ b/include/linux/random.h
111@@ -50,6 +50,10 @@ extern void add_input_randomness(unsigne
112                  unsigned int value);
113 extern void add_interrupt_randomness(int irq);
114 
115+extern void random_input_words(__u32 *buf, size_t wordcount, int ent_count);
116+extern int random_input_wait(void);
117+#define HAS_RANDOM_INPUT_WAIT 1
118+
119 extern void get_random_bytes(void *buf, int nbytes);
120 void generate_random_uuid(unsigned char uuid_out[16]);
121 
122--- a/kernel/pid.c
123+++ b/kernel/pid.c
124@@ -387,6 +387,7 @@ struct task_struct *find_task_by_vpid(pi
125 {
126     return find_task_by_pid_ns(vnr, current->nsproxy->pid_ns);
127 }
128+EXPORT_SYMBOL(find_task_by_vpid);
129 
130 struct pid *get_task_pid(struct task_struct *task, enum pid_type type)
131 {
132

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