diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2012-08-21 20:38:50 +0200 |
|---|---|---|
| committer | Steven Rostedt <rostedt@rostedt.homelinux.com> | 2013-09-13 12:33:09 -0400 |
| commit | 612d85ab70822ad970d7de40ce09033c8045d5a8 (patch) | |
| tree | 7449bb17e0ce1956999a4b2e011a504faa659b84 /include | |
| parent | 6596201d73ff8716517dc7e09fa700e575750638 (diff) | |
random: Make it work on rt
Delegate the random insertion to the forced threaded interrupt
handler. Store the return IP of the hard interrupt handler in the irq
descriptor and feed it into the random generator as a source of
entropy.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable-rt@vger.kernel.org
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/irqdesc.h | 1 | ||||
| -rw-r--r-- | include/linux/random.h | 2 |
2 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/irqdesc.h b/include/linux/irqdesc.h index f1e2527006bd..5f4f0919d888 100644 --- a/include/linux/irqdesc.h +++ b/include/linux/irqdesc.h @@ -53,6 +53,7 @@ struct irq_desc { unsigned int irq_count; /* For detecting broken IRQs */ unsigned long last_unhandled; /* Aging timer for unhandled count */ unsigned int irqs_unhandled; + u64 random_ip; raw_spinlock_t lock; struct cpumask *percpu_enabled; #ifdef CONFIG_SMP diff --git a/include/linux/random.h b/include/linux/random.h index 29e217a7e6d0..3995b33fbfa0 100644 --- a/include/linux/random.h +++ b/include/linux/random.h @@ -53,7 +53,7 @@ extern void rand_initialize_irq(int irq); extern void add_device_randomness(const void *, unsigned int); extern void add_input_randomness(unsigned int type, unsigned int code, unsigned int value); -extern void add_interrupt_randomness(int irq, int irq_flags); +extern void add_interrupt_randomness(int irq, int irq_flags, __u64 ip); extern void get_random_bytes(void *buf, int nbytes); extern void get_random_bytes_arch(void *buf, int nbytes); |