2.6.32-longterm review patch. If anyone has any objections, please let me know.
------------------
From: Theodore Ts'o <ty...@mit.edu>
commit c5857ccf293968348e5eb4ebedc68074de3dcda6 upstream.
With the new interrupt sampling system, we are no longer using the
timer_rand_state structure in the irq descriptor, so we can stop
initializing it now.
[ Merged in fixes from Sedat to find some last missing references to
rand_initialize_irq() ]
Signed-off-by: "Theodore Ts'o" <ty...@mit.edu>
Signed-off-by: Sedat Dilek <sedat.di...@gmail.com>
[PG: in .34 the irqdesc.h content is in irq.h instead.]
Signed-off-by: Paul Gortmaker <paul.gortma...@windriver.com>
Signed-off-by: Willy Tarreau <w...@1wt.eu>
---
arch/ia64/kernel/irq_ia64.c | 1 -
drivers/char/random.c | 55 -------------------------------------------
include/linux/irq.h | 1 -
include/linux/random.h | 2 -
kernel/irq/manage.c | 17 -------------
5 files changed, 0 insertions(+), 76 deletions(-)
diff --git a/arch/ia64/kernel/irq_ia64.c b/arch/ia64/kernel/irq_ia64.c
index dd9d7b5..463b8a7 100644
--- a/arch/ia64/kernel/irq_ia64.c
+++ b/arch/ia64/kernel/irq_ia64.c
@@ -24,7 +24,6 @@
#include <linux/kernel_stat.h>
#include <linux/slab.h>
#include <linux/ptrace.h>
-#include <linux/random.h> /* for rand_initialize_irq() */
#include <linux/signal.h>
#include <linux/smp.h>
#include <linux/threads.h>
diff --git a/drivers/char/random.c b/drivers/char/random.c
index 3ea1ddb..cbb63b0 100644
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -621,43 +621,6 @@ struct timer_rand_state {
unsigned dont_count_entropy:1;
};
-#ifndef CONFIG_GENERIC_HARDIRQS
-
-static struct timer_rand_state *irq_timer_state[NR_IRQS];
-
-static struct timer_rand_state *get_timer_rand_state(unsigned int irq)
-{
- return irq_timer_state[irq];
-}
-
-static void set_timer_rand_state(unsigned int irq,
- struct timer_rand_state *state)
-{
- irq_timer_state[irq] = state;
-}
-
-#else
-
-static struct timer_rand_state *get_timer_rand_state(unsigned int irq)
-{
- struct irq_desc *desc;
-
- desc = irq_to_desc(irq);
-
- return desc->timer_rand_state;
-}
-
-static void set_timer_rand_state(unsigned int irq,
- struct timer_rand_state *state)
-{
- struct irq_desc *desc;
-
- desc = irq_to_desc(irq);
-
- desc->timer_rand_state = state;
-}
-#endif
-
/*
* Add device- or boot-specific data to the input and nonblocking
* pools to help initialize them to unique values.
@@ -1123,24 +1086,6 @@ static int rand_initialize(void)
}
module_init(rand_initialize);
-void rand_initialize_irq(int irq)
-{
- struct timer_rand_state *state;
-
- state = get_timer_rand_state(irq);
-
- if (state)
- return;
-
- /*
- * If kzalloc returns null, we just won't use that entropy
- * source.
- */
- state = kzalloc(sizeof(struct timer_rand_state), GFP_KERNEL);
- if (state)
- set_timer_rand_state(irq, state);
-}
-
#ifdef CONFIG_BLOCK
void rand_initialize_disk(struct gendisk *disk)
{
diff --git a/include/linux/irq.h b/include/linux/irq.h
index 9e5f45a..2333710 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -174,7 +174,6 @@ struct irq_2_iommu;
*/
struct irq_desc {
unsigned int irq;
- struct timer_rand_state *timer_rand_state;
unsigned int *kstat_irqs;
#ifdef CONFIG_INTR_REMAP
struct irq_2_iommu *irq_2_iommu;
diff --git a/include/linux/random.h b/include/linux/random.h
index 5a376bc..1864957 100644
--- a/include/linux/random.h
+++ b/include/linux/random.h
@@ -44,8 +44,6 @@ struct rand_pool_info {
#ifdef __KERNEL__
-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);
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index 315705c..5dd29f3 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -633,22 +633,6 @@ __setup_irq(unsigned int irq, struct irq_desc *desc,
struct irqaction *new)
if (desc->chip == &no_irq_chip)
return -ENOSYS;
- /*
- * Some drivers like serial.c use request_irq() heavily,
- * so we have to be careful not to interfere with a
- * running system.
- */
- if (new->flags & IRQF_SAMPLE_RANDOM) {
- /*
- * This function might sleep, we want to call it first,
- * outside of the atomic block.
- * Yes, this might clear the entropy pool if the wrong
- * driver is attempted to be loaded, without actually
- * installing a new handler, but is this really a problem,
- * only the sysadmin is able to do this.
- */
- rand_initialize_irq(irq);
- }
/* Oneshot interrupts are not allowed with shared */
if ((new->flags & IRQF_ONESHOT) && (new->flags & IRQF_SHARED))
@@ -1021,7 +1005,6 @@ EXPORT_SYMBOL(free_irq);
*
* IRQF_SHARED Interrupt is shared
* IRQF_DISABLED Disable local interrupts while processing
- * IRQF_SAMPLE_RANDOM The interrupt can be used for entropy
* IRQF_TRIGGER_* Specify active edge(s) or level
*
*/
--
1.7.2.1.45.g54fbc
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