target/linux/generic/patches-2.6.37/941-ocf_20110720.patch

   1 --- a/kernel/pid.c
   2 +++ b/kernel/pid.c
   3 @@ -424,6 +424,7 @@ 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