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Paul Mackerras ca8f2d7f01 perf_counter: powerpc: add nmi_enter/nmi_exit calls 
Impact: fix potential deadlocks on powerpc

Now that the core is using in_nmi() (added in e30e08f6, "perf_counter:
fix NMI race in task clock"), we need the powerpc perf_counter_interrupt
to call nmi_enter() and nmi_exit() in those cases where the interrupt
happens when interrupts are soft-disabled.

If interrupts were soft-enabled, we can treat it as a regular interrupt
and do irq_enter/irq_exit around the whole routine. This lets us get rid
of the test_perf_counter_pending() call at the end of
perf_counter_interrupt, thus simplifying things a little.

Signed-off-by: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <18909.31952.873098.336615@cargo.ozlabs.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-09 07:56:08 +02:00
..
boot Merge branch 'i2c-for-2630-v2' of git://aeryn.fluff.org.uk/bjdooks/linux 2009-04-07 08:45:12 -07:00
configs powerpc/pseries: Enable relay in pseries_defconfig 2009-04-07 15:18:59 +10:00
include/asm Merge commit 'v2.6.30-rc1' into perfcounters/core 2009-04-08 10:35:30 +02:00
kernel perf_counter: powerpc: add nmi_enter/nmi_exit calls 2009-04-09 07:56:08 +02:00
kvm KVM: ppc: e500: Fix the bug that KVM is unstable in SMP 2009-03-24 11:03:15 +02:00
lib Merge commit 'origin/master' into next 2009-03-11 17:10:07 +11:00
math-emu powerpc/math-emu: Fix efp dependence 2009-03-11 06:00:08 -05:00
mm perf_counter: allow for data addresses to be recorded 2009-04-08 19:05:56 +02:00
oprofile powerpc/oprofile: G4 oprofile has variable number of counters 2009-03-11 17:10:16 +11:00
platforms Merge commit 'v2.6.30-rc1' into perfcounters/core 2009-04-08 10:35:30 +02:00
sysdev Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc 2009-04-07 07:40:55 -07:00
xmon
Kconfig powerpc: Correct dependency of KEXEC 2009-04-07 15:19:00 +10:00
Kconfig.debug generic debug pagealloc: build fix 2009-04-02 19:04:48 -07:00
Makefile powerpc/math-emu: Fix efp dependence 2009-03-11 06:00:08 -05:00