Paul Mackerras b0d278b7d3 powerpc/perf_event: Reduce latency of calling perf_event_do_pending ... Commit 0fe1ac48 ("powerpc/perf_event: Fix oops due to perf_event_do_pending call") moved the call to perf_event_do_pending in timer_interrupt() down so that it was after the irq_enter() call. Unfortunately this moved it after the code that checks whether it is time for the next decrementer clock event. The result is that the call to perf_event_do_pending() won't happen until the next decrementer clock event is due. This was pointed out by Milton Miller. This fixes it by moving the check for whether it's time for the next decrementer clock event down to the point where we're about to call the event handler, after we've called perf_event_do_pending. This has the side effect that on old pre-Core99 Powermacs where we use the ppc_n_lost_interrupts mechanism to replay interrupts, a replayed interrupt will incur a little more latency since it will now do the code from the irq_enter down to the irq_exit, that it used to skip. However, these machines are now old and rare enough that this doesn't matter. To make it clear that ppc_n_lost_interrupts is only used on Powermacs, and to speed up the code slightly on non-Powermac ppc32 machines, the code that tests ppc_n_lost_interrupts is now conditional on CONFIG_PMAC as well as CONFIG_PPC32. Signed-off-by: Paul Mackerras <paulus@samba.org> Cc: stable@kernel.org Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>		2010-08-31 11:35:13 +10:00
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boot	Merge remote branch 'jwb/merge' into merge	2010-08-24 14:36:45 +10:00
configs	powerpc: Trim defconfigs	2010-08-09 11:19:16 +10:00
include/asm	powerpc: Wire up fanotify_init, fanotify_mark, prlimit64 syscalls	2010-08-24 15:28:28 +10:00
kernel	powerpc/perf_event: Reduce latency of calling perf_event_do_pending	2010-08-31 11:35:13 +10:00
kvm	Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc	2010-08-05 09:03:46 -07:00
lib	Merge commit 'paulus-perf/master' into next	2010-07-09 11:25:48 +10:00
math-emu	powerpc/math-emu: Fix efp dependence	2009-03-11 06:00:08 -05:00
mm	powerpc: Export memstart_addr and kernstart_addr on ppc64	2010-08-24 15:26:26 +10:00
oprofile	powerpc/oprofile: Don't build server oprofile drivers on 64-bit BookE	2010-07-14 14:13:54 +10:00
platforms	powerpc: Fix config dependency problem with MPIC_U3_HT_IRQS	2010-08-24 15:28:29 +10:00
sysdev	Merge branch 'next-devicetree' of git://git.secretlab.ca/git/linux-2.6	2010-08-12 09:11:31 -07:00
xmon	Input: sysrq - drop tty argument from sysrq ops handlers	2010-08-19 22:07:06 -07:00
Kconfig	Merge branch 'timers-timekeeping-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2010-08-06 13:18:29 -07:00
Kconfig.debug	powerpc: Unconditionally enabled irq stacks	2010-06-15 15:02:37 +10:00
Makefile	powerpc: Fix typo in uImage target	2010-08-24 15:26:32 +10:00
relocs_check.pl	powerpc: Check for unsupported relocs when using CONFIG_RELOCATABLE	2009-09-24 15:31:40 +10:00