Root/target/linux/generic/patches-2.6.38/941-ocf_20110720.patch

1--- a/kernel/pid.c
2+++ b/kernel/pid.c
3@@ -427,6 +427,7 @@ struct task_struct *find_task_by_vpid(pi
4 {
5     return find_task_by_pid_ns(vnr, current->nsproxy->pid_ns);
6 }
7+EXPORT_SYMBOL(find_task_by_vpid);
8 
9 struct pid *get_task_pid(struct task_struct *task, enum pid_type type)
10 {
11--- a/drivers/char/random.c
12+++ b/drivers/char/random.c
13@@ -129,6 +129,9 @@
14  * unsigned int value);
15  * void add_interrupt_randomness(int irq);
16  *
17+ * void random_input_words(__u32 *buf, size_t wordcount, int ent_count)
18+ * int random_input_wait(void);
19+ *
20  * add_input_randomness() uses the input layer interrupt timing, as well as
21  * the event type information from the hardware.
22  *
23@@ -140,6 +143,13 @@
24  * a better measure, since the timing of the disk interrupts are more
25  * unpredictable.
26  *
27+ * random_input_words() just provides a raw block of entropy to the input
28+ * pool, such as from a hardware entropy generator.
29+ *
30+ * random_input_wait() suspends the caller until such time as the
31+ * entropy pool falls below the write threshold, and returns a count of how
32+ * much entropy (in bits) is needed to sustain the pool.
33+ *
34  * All of these routines try to estimate how many bits of randomness a
35  * particular randomness source. They do this by keeping track of the
36  * first and second order deltas of the event timings.
37@@ -715,6 +725,63 @@ void add_disk_randomness(struct gendisk
38 }
39 #endif
40 
41+/*
42+ * random_input_words - add bulk entropy to pool
43+ *
44+ * @buf: buffer to add
45+ * @wordcount: number of __u32 words to add
46+ * @ent_count: total amount of entropy (in bits) to credit
47+ *
48+ * this provides bulk input of entropy to the input pool
49+ *
50+ */
51+void random_input_words(__u32 *buf, size_t wordcount, int ent_count)
52+{
53+ mix_pool_bytes(&input_pool, buf, wordcount*4);
54+
55+ credit_entropy_bits(&input_pool, ent_count);
56+
57+ DEBUG_ENT("crediting %d bits => %d\n",
58+ ent_count, input_pool.entropy_count);
59+ /*
60+ * Wake up waiting processes if we have enough
61+ * entropy.
62+ */
63+ if (input_pool.entropy_count >= random_read_wakeup_thresh)
64+ wake_up_interruptible(&random_read_wait);
65+}
66+EXPORT_SYMBOL(random_input_words);
67+
68+/*
69+ * random_input_wait - wait until random needs entropy
70+ *
71+ * this function sleeps until the /dev/random subsystem actually
72+ * needs more entropy, and then return the amount of entropy
73+ * that it would be nice to have added to the system.
74+ */
75+int random_input_wait(void)
76+{
77+ int count;
78+
79+ wait_event_interruptible(random_write_wait,
80+ input_pool.entropy_count < random_write_wakeup_thresh);
81+
82+ count = random_write_wakeup_thresh - input_pool.entropy_count;
83+
84+ /* likely we got woken up due to a signal */
85+ if (count <= 0) count = random_read_wakeup_thresh;
86+
87+ DEBUG_ENT("requesting %d bits from input_wait()er %d<%d\n",
88+ count,
89+ input_pool.entropy_count, random_write_wakeup_thresh);
90+
91+ return count;
92+}
93+EXPORT_SYMBOL(random_input_wait);
94+
95+
96+#define EXTRACT_SIZE 10
97+
98 /*********************************************************************
99  *
100  * Entropy extraction routines
101--- a/fs/fcntl.c
102+++ b/fs/fcntl.c
103@@ -142,6 +142,7 @@ SYSCALL_DEFINE1(dup, unsigned int, filde
104     }
105     return ret;
106 }
107+EXPORT_SYMBOL(sys_dup);
108 
109 #define SETFL_MASK (O_APPEND | O_NONBLOCK | O_NDELAY | O_DIRECT | O_NOATIME)
110 
111--- a/include/linux/miscdevice.h
112+++ b/include/linux/miscdevice.h
113@@ -18,6 +18,7 @@
114 #define APOLLO_MOUSE_MINOR 7
115 #define PC110PAD_MINOR 9
116 /*#define ADB_MOUSE_MINOR 10 FIXME OBSOLETE */
117+#define CRYPTODEV_MINOR 70 /* /dev/crypto */
118 #define WATCHDOG_MINOR 130 /* Watchdog timer */
119 #define TEMP_MINOR 131 /* Temperature Sensor */
120 #define RTC_MINOR 135
121--- a/include/linux/random.h
122+++ b/include/linux/random.h
123@@ -54,6 +54,10 @@ extern void add_input_randomness(unsigne
124                  unsigned int value);
125 extern void add_interrupt_randomness(int irq);
126 
127+extern void random_input_words(__u32 *buf, size_t wordcount, int ent_count);
128+extern int random_input_wait(void);
129+#define HAS_RANDOM_INPUT_WAIT 1
130+
131 extern void get_random_bytes(void *buf, int nbytes);
132 void generate_random_uuid(unsigned char uuid_out[16]);
133 
134

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