diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2012-08-21 18:38:50 (GMT) |
|---|---|---|
| committer | Scott Wood <scottwood@freescale.com> | 2015-02-13 22:21:02 (GMT) |
| commit | 9a27bb504194a8f6351513b3153c290c2ec90b09 (patch) | |
| tree | 0d90afd9b4c644f495f28c138ab61733fc8043e2 /include | |
| parent | bdf96ee423279aa590ba3afd784013771f85de70 (diff) | |
| download | linux-fsl-qoriq-9a27bb504194a8f6351513b3153c290c2ec90b09.tar.xz | |
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
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 a7b4b61..6686311 100644 --- a/include/linux/irqdesc.h +++ b/include/linux/irqdesc.h @@ -56,6 +56,7 @@ struct irq_desc { unsigned int irqs_unhandled; atomic_t threads_handled; int threads_handled_last; + 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 bf9085e..de4894a 100644 --- a/include/linux/random.h +++ b/include/linux/random.h @@ -12,7 +12,7 @@ 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); |