diff options
| author | David S. Miller <davem@davemloft.net> | 2009-09-10 05:59:24 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-09-10 05:59:24 -0700 |
| commit | 5686f9c3d67d5a20108fa26105c98b042df13123 (patch) | |
| tree | cac519fa1a6e8cdcd90787753352b8930d2cfaab /arch | |
| parent | 2d0740c4562493b60f59ca9b0330a2d5e01d43ec (diff) | |
sparc64: Implement a real set_perf_counter_pending().
When the perf counter subsystem needs to reschedule work out
from an NMI, it invokes set_perf_counter_pending().
This triggers a non-NMI irq which should invoke
perf_counter_do_pending().
Currently this won't trigger because sparc64 won't trigger
the perf counter subsystem from NMIs, but when the HW counter
support is added it will.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/sparc/include/asm/perf_counter.h | 2 | ||||
| -rw-r--r-- | arch/sparc/kernel/pcr.c | 14 |
2 files changed, 14 insertions, 2 deletions
diff --git a/arch/sparc/include/asm/perf_counter.h b/arch/sparc/include/asm/perf_counter.h index f07c587a830..38d64454643 100644 --- a/arch/sparc/include/asm/perf_counter.h +++ b/arch/sparc/include/asm/perf_counter.h @@ -1,7 +1,7 @@ #ifndef __ASM_SPARC_PERF_COUNTER_H #define __ASM_SPARC_PERF_COUNTER_H -static inline void set_perf_counter_pending(void) { } +extern void set_perf_counter_pending(void); #define PERF_COUNTER_INDEX_OFFSET 0 diff --git a/arch/sparc/kernel/pcr.c b/arch/sparc/kernel/pcr.c index 1ae8cdd7e70..68ff0010707 100644 --- a/arch/sparc/kernel/pcr.c +++ b/arch/sparc/kernel/pcr.c @@ -7,6 +7,8 @@ #include <linux/init.h> #include <linux/irq.h> +#include <linux/perf_counter.h> + #include <asm/pil.h> #include <asm/pcr.h> #include <asm/nmi.h> @@ -34,10 +36,20 @@ unsigned int picl_shift; */ void deferred_pcr_work_irq(int irq, struct pt_regs *regs) { + struct pt_regs *old_regs; + clear_softint(1 << PIL_DEFERRED_PCR_WORK); + + old_regs = set_irq_regs(regs); + irq_enter(); +#ifdef CONFIG_PERF_COUNTERS + perf_counter_do_pending(); +#endif + irq_exit(); + set_irq_regs(old_regs); } -void schedule_deferred_pcr_work(void) +void set_perf_counter_pending(void) { set_softint(1 << PIL_DEFERRED_PCR_WORK); } |