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Kirill Smelkov
linux
Commits
54105201
Commit
54105201
authored
Feb 21, 2004
by
Keith M. Wesolowski
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[SPARC32]: Remove stale SMP irq implementation.
parent
69914796
Changes
2
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2 changed files
with
8 additions
and
67 deletions
+8
-67
include/asm-sparc/hardirq.h
include/asm-sparc/hardirq.h
+5
-67
include/asm-sparc/thread_info.h
include/asm-sparc/thread_info.h
+3
-0
No files found.
include/asm-sparc/hardirq.h
View file @
54105201
...
...
@@ -15,15 +15,6 @@
/* entry.S is sensitive to the offsets of these fields */
/* XXX P3 Is it? */
typedef
struct
{
unsigned
int
__softirq_pending
;
unsigned
int
__unused_1
;
#ifndef CONFIG_SMP
unsigned
int
WAS__local_irq_count
;
#else
unsigned
int
__unused_on_SMP
;
/* DaveM says use brlock for SMP irq. KAO */
#endif
unsigned
int
WAS__local_bh_count
;
unsigned
int
__syscall_count
;
struct
task_struct
*
__ksoftirqd_task
;
}
____cacheline_aligned
irq_cpustat_t
;
#include <linux/irq_cpustat.h>
/* Standard mappings for irq_cpustat_t above */
...
...
@@ -86,11 +77,11 @@ typedef struct {
#define hardirq_trylock() (!in_interrupt())
#define hardirq_endlock() do { } while (0)
#ifndef CONFIG_SMP
#define irq_enter() (preempt_count() += HARDIRQ_OFFSET)
#ifdef CONFIG_PREEMPT
# define in_atomic() (preempt_count() != kernel_locked())
#include <linux/smp_lock.h>
# define in_atomic() ((preempt_count() & ~PREEMPT_ACTIVE) != kernel_locked())
# define IRQ_EXIT_OFFSET (HARDIRQ_OFFSET-1)
#else
# define in_atomic() (preempt_count() != 0)
...
...
@@ -104,63 +95,10 @@ do { \
preempt_enable_no_resched(); \
} while (0)
#else
/* Note that local_irq_count() is replaced by sparc64 specific version for SMP */
/* XXX This is likely to be broken by the above preempt-based IRQs */
#define irq_enter() br_read_lock(BR_GLOBALIRQ_LOCK)
#undef local_irq_count
#define local_irq_count(cpu) (__brlock_array[cpu][BR_GLOBALIRQ_LOCK])
#define irq_exit() br_read_unlock(BR_GLOBALIRQ_LOCK)
#endif
#ifdef CONFIG_PREEMPT
# define in_atomic() (preempt_count() != kernel_locked())
#else
# define in_atomic() (preempt_count() != 0)
#endif
#ifndef CONFIG_SMP
#define synchronize_irq(irq) barrier()
#else
/* (CONFIG_SMP) */
static
__inline__
int
irqs_running
(
void
)
{
int
i
;
for
(
i
=
0
;
i
<
smp_num_cpus
;
i
++
)
if
(
local_irq_count
(
cpu_logical_map
(
i
)))
return
1
;
return
0
;
}
extern
unsigned
char
global_irq_holder
;
static
inline
void
release_irqlock
(
int
cpu
)
{
/* if we didn't own the irq lock, just ignore... */
if
(
global_irq_holder
==
(
unsigned
char
)
cpu
)
{
global_irq_holder
=
NO_PROC_ID
;
br_write_unlock
(
BR_GLOBALIRQ_LOCK
);
}
}
#if 0
static inline int hardirq_trylock(int cpu)
{
spinlock_t *lock = &__br_write_locks[BR_GLOBALIRQ_LOCK].lock;
return (!local_irq_count(cpu) && !spin_is_locked(lock));
}
#endif
# define synchronize_irq(irq) barrier()
#else
/* SMP */
extern
void
synchronize_irq
(
unsigned
int
irq
);
#endif
/* CONFIG_SMP */
// extern void show_stack(unsigned long * esp);
#endif
/* SMP */
#endif
/* __SPARC_HARDIRQ_H */
include/asm-sparc/thread_info.h
View file @
54105201
...
...
@@ -53,6 +53,8 @@ struct thread_info {
/*
* macros/functions for gaining access to the thread information structure
*
* preempt_count needs to be 1 initially, until the scheduler is functional.
*/
#define INIT_THREAD_INFO(tsk) \
{ \
...
...
@@ -61,6 +63,7 @@ struct thread_info {
.exec_domain = &default_exec_domain, \
.flags = 0, \
.cpu = 0, \
.preempt_count = 1, \
.restart_block = { \
.fn = do_no_restart_syscall, \
}, \
...
...
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