From: Alexandros C. Couloumbis <alex@ozo.com>
Date: Fri, 11 Jun 2010 13:49:39 +0000 (+0000)
Subject: generic-2.6/patches-2.6.35: fix ocf missing parts
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=7f32c3672e8ddedffe539313042218b43fd339a0;p=openwrt%2Fstaging%2Fthess.git

generic-2.6/patches-2.6.35: fix ocf missing parts

SVN-Revision: 21757
---

diff --git a/target/linux/generic-2.6/patches-2.6.35/971-ocf_20100325.patch b/target/linux/generic-2.6/patches-2.6.35/971-ocf_20100325.patch
index 02bb9f29b2..9aa36bcd50 100644
--- a/target/linux/generic-2.6/patches-2.6.35/971-ocf_20100325.patch
+++ b/target/linux/generic-2.6/patches-2.6.35/971-ocf_20100325.patch
@@ -1,3 +1,91 @@
+--- a/drivers/char/random.c
++++ b/drivers/char/random.c
+@@ -129,6 +129,9 @@
+  *                                unsigned int value);
+  * 	void add_interrupt_randomness(int irq);
+  *
++ *      void random_input_words(__u32 *buf, size_t wordcount, int ent_count)
++ *      int random_input_wait(void);
++ *
+  * add_input_randomness() uses the input layer interrupt timing, as well as
+  * the event type information from the hardware.
+  *
+@@ -140,6 +143,13 @@
+  * a better measure, since the timing of the disk interrupts are more
+  * unpredictable.
+  *
++ * random_input_words() just provides a raw block of entropy to the input
++ * pool, such as from a hardware entropy generator.
++ *
++ * random_input_wait() suspends the caller until such time as the
++ * entropy pool falls below the write threshold, and returns a count of how
++ * much entropy (in bits) is needed to sustain the pool.
++ *
+  * All of these routines try to estimate how many bits of randomness a
+  * particular randomness source.  They do this by keeping track of the
+  * first and second order deltas of the event timings.
+@@ -715,6 +725,61 @@ void add_disk_randomness(struct gendisk
+ }
+ #endif
+ 
++/*
++ * random_input_words - add bulk entropy to pool
++ *
++ * @buf: buffer to add
++ * @wordcount: number of __u32 words to add
++ * @ent_count: total amount of entropy (in bits) to credit
++ *
++ * this provides bulk input of entropy to the input pool
++ *
++ */
++void random_input_words(__u32 *buf, size_t wordcount, int ent_count)
++{
++        mix_pool_bytes(&input_pool, buf, wordcount*4);
++
++        credit_entropy_bits(&input_pool, ent_count);
++
++        DEBUG_ENT("crediting %d bits => %d\n",
++                  ent_count, input_pool.entropy_count);
++	/*
++	 * Wake up waiting processes if we have enough
++	 * entropy.
++	 */
++	if (input_pool.entropy_count >= random_read_wakeup_thresh)
++		wake_up_interruptible(&random_read_wait);
++}
++EXPORT_SYMBOL(random_input_words);
++
++/*
++ * random_input_wait - wait until random needs entropy
++ *
++ * this function sleeps until the /dev/random subsystem actually
++ * needs more entropy, and then return the amount of entropy
++ * that it would be nice to have added to the system.
++ */
++int random_input_wait(void)
++{
++	int count;
++
++	wait_event_interruptible(random_write_wait,
++		input_pool.entropy_count < random_write_wakeup_thresh);
++
++	count = random_write_wakeup_thresh - input_pool.entropy_count;
++
++	/* likely we got woken up due to a signal */
++	if (count <= 0) count = random_read_wakeup_thresh;
++
++	DEBUG_ENT("requesting %d bits from input_wait()er %d<%d\n",
++		count,
++		input_pool.entropy_count, random_write_wakeup_thresh);
++
++	return count;
++}
++EXPORT_SYMBOL(random_input_wait);
++
++
+ /*********************************************************************
+  *
+  * Entropy extraction routines
 --- a/fs/fcntl.c
 +++ b/fs/fcntl.c
 @@ -141,6 +141,7 @@ SYSCALL_DEFINE1(dup, unsigned int, filde