openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

[PARISC] More pt_regs removal 

Remove pt_regs from ipi_interrupt and timer_interrupt.
Inline smp_do_timer() into its only caller, and unify the SMP and
non-SMP paths.  Fixes a profiling bug.

Signed-off-by: Matthew Wilcox <matthew@wil.cx>
This commit is contained in:
Matthew Wilcox 2006-10-07 06:01:11 -06:00 committed by Matthew Wilcox
parent bbd6330ea1
commit c7753f1871
2 changed files with 12 additions and 27 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
arch/parisc/kernel/smp.c
View File

@ -154,7 +154,7 @@ halt_processor(void)
irqreturn_t irqreturn_t
ipi_interrupt(int irq, void *dev_id, struct pt_regs *regs) ipi_interrupt(int irq, void *dev_id)
{ {
int this_cpu = smp_processor_id(); int this_cpu = smp_processor_id();
struct cpuinfo_parisc *p = &cpu_data[this_cpu]; struct cpuinfo_parisc *p = &cpu_data[this_cpu];
@ -414,19 +414,6 @@ smp_flush_tlb_all(void)
on_each_cpu(flush_tlb_all_local, NULL, 1, 1); on_each_cpu(flush_tlb_all_local, NULL, 1, 1);
} }
void
smp_do_timer(struct pt_regs *regs)
{
int cpu = smp_processor_id();
struct cpuinfo_parisc *data = &cpu_data[cpu];
if (!--data->prof_counter) {
data->prof_counter = data->prof_multiplier;
update_process_times(user_mode(regs));
}
}
/* /*
* Called by secondaries to update state and initialize CPU registers. * Called by secondaries to update state and initialize CPU registers.
*/ */

22
arch/parisc/kernel/time.c
View File

@ -34,10 +34,6 @@
static unsigned long clocktick __read_mostly; /* timer cycles per tick */ static unsigned long clocktick __read_mostly; /* timer cycles per tick */
#ifdef CONFIG_SMP
extern void smp_do_timer(struct pt_regs *regs);
#endif
/* /*
* We keep time on PA-RISC Linux by using the Interval Timer which is * We keep time on PA-RISC Linux by using the Interval Timer which is
* a pair of registers; one is read-only and one is write-only; both * a pair of registers; one is read-only and one is write-only; both
@ -55,13 +51,14 @@ extern void smp_do_timer(struct pt_regs *regs);
* held off for an arbitrarily long period of time by interrupts being * held off for an arbitrarily long period of time by interrupts being
* disabled, so we may miss one or more ticks. * disabled, so we may miss one or more ticks.
*/ */
irqreturn_t timer_interrupt(int irq, void *dev_id, struct pt_regs *regs) irqreturn_t timer_interrupt(int irq, void *dev_id)
{ {
unsigned long now; unsigned long now;
unsigned long next_tick; unsigned long next_tick;
unsigned long cycles_elapsed, ticks_elapsed; unsigned long cycles_elapsed, ticks_elapsed;
unsigned long cycles_remainder; unsigned long cycles_remainder;
unsigned int cpu = smp_processor_id(); unsigned int cpu = smp_processor_id();
struct cpuinfo_parisc *cpuinfo = &cpu_data[cpu];
/* gcc can optimize for "read-only" case with a local clocktick */ /* gcc can optimize for "read-only" case with a local clocktick */
unsigned long cpt = clocktick; unsigned long cpt = clocktick;
@ -69,7 +66,7 @@ irqreturn_t timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
profile_tick(CPU_PROFILING); profile_tick(CPU_PROFILING);
/* Initialize next_tick to the expected tick time. */ /* Initialize next_tick to the expected tick time. */
next_tick = cpu_data[cpu].it_value; next_tick = cpuinfo->it_value;
/* Get current interval timer. /* Get current interval timer.
* CR16 reads as 64 bits in CPU wide mode. * CR16 reads as 64 bits in CPU wide mode.
@ -120,7 +117,7 @@ irqreturn_t timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
*/ */
next_tick = now + cycles_remainder; next_tick = now + cycles_remainder;
cpu_data[cpu].it_value = next_tick; cpuinfo->it_value = next_tick;
/* Skip one clocktick on purpose if we are likely to miss next_tick. /* Skip one clocktick on purpose if we are likely to miss next_tick.
* We want to avoid the new next_tick being less than CR16. * We want to avoid the new next_tick being less than CR16.
@ -138,11 +135,12 @@ irqreturn_t timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
/* Done mucking with unreliable delivery of interrupts. /* Done mucking with unreliable delivery of interrupts.
* Go do system house keeping. * Go do system house keeping.
*/ */
#ifdef CONFIG_SMP
smp_do_timer(regs); if (!--cpuinfo->prof_counter) {
#else cpuinfo->prof_counter = cpuinfo->prof_multiplier;
update_process_times(user_mode(regs)); update_process_times(user_mode(get_irq_regs()));
#endif }
if (cpu == 0) { if (cpu == 0) {
write_seqlock(&xtime_lock); write_seqlock(&xtime_lock);
do_timer(ticks_elapsed); do_timer(ticks_elapsed);