| random.c (43759d4f429c8d55fd56f863542e20f4e6e8f589) | random.c (c84dbf61a7b322188d2a7fddc0cc6317ac6713e2) |
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| 1/* 2 * random.c -- A strong random number generator 3 * 4 * Copyright Matt Mackall <mpm@selenic.com>, 2003, 2004, 2005 5 * 6 * Copyright Theodore Ts'o, 1994, 1995, 1996, 1997, 1998, 1999. All 7 * rights reserved. 8 * --- 236 unchanged lines hidden (view full) --- 245#include <linux/random.h> 246#include <linux/poll.h> 247#include <linux/init.h> 248#include <linux/fs.h> 249#include <linux/genhd.h> 250#include <linux/interrupt.h> 251#include <linux/mm.h> 252#include <linux/spinlock.h> | 1/* 2 * random.c -- A strong random number generator 3 * 4 * Copyright Matt Mackall <mpm@selenic.com>, 2003, 2004, 2005 5 * 6 * Copyright Theodore Ts'o, 1994, 1995, 1996, 1997, 1998, 1999. All 7 * rights reserved. 8 * --- 236 unchanged lines hidden (view full) --- 245#include <linux/random.h> 246#include <linux/poll.h> 247#include <linux/init.h> 248#include <linux/fs.h> 249#include <linux/genhd.h> 250#include <linux/interrupt.h> 251#include <linux/mm.h> 252#include <linux/spinlock.h> |
| 253#include <linux/kthread.h> |
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| 253#include <linux/percpu.h> 254#include <linux/cryptohash.h> 255#include <linux/fips.h> 256#include <linux/ptrace.h> 257#include <linux/kmemcheck.h> 258#include <linux/workqueue.h> 259#include <linux/irq.h> 260 --- 1484 unchanged lines hidden (view full) --- 1745randomize_range(unsigned long start, unsigned long end, unsigned long len) 1746{ 1747 unsigned long range = end - len - start; 1748 1749 if (end <= start + len) 1750 return 0; 1751 return PAGE_ALIGN(get_random_int() % range + start); 1752} | 254#include <linux/percpu.h> 255#include <linux/cryptohash.h> 256#include <linux/fips.h> 257#include <linux/ptrace.h> 258#include <linux/kmemcheck.h> 259#include <linux/workqueue.h> 260#include <linux/irq.h> 261 --- 1484 unchanged lines hidden (view full) --- 1746randomize_range(unsigned long start, unsigned long end, unsigned long len) 1747{ 1748 unsigned long range = end - len - start; 1749 1750 if (end <= start + len) 1751 return 0; 1752 return PAGE_ALIGN(get_random_int() % range + start); 1753} |
| 1754 1755/* Interface for in-kernel drivers of true hardware RNGs. 1756 * Those devices may produce endless random bits and will be throttled 1757 * when our pool is full. 1758 */ 1759void add_hwgenerator_randomness(const char *buffer, size_t count, 1760 size_t entropy) 1761{ 1762 struct entropy_store *poolp = &input_pool; 1763 1764 /* Suspend writing if we're above the trickle threshold. 1765 * We'll be woken up again once below random_write_wakeup_thresh, 1766 * or when the calling thread is about to terminate. 1767 */ 1768 wait_event_interruptible(random_write_wait, kthread_should_stop() || 1769 ENTROPY_BITS(&input_pool) <= random_write_wakeup_bits); 1770 mix_pool_bytes(poolp, buffer, count); 1771 credit_entropy_bits(poolp, entropy); 1772} 1773EXPORT_SYMBOL_GPL(add_hwgenerator_randomness); |
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