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| author | Hugh Dickins <hugh@veritas.com> | 2006-11-01 05:44:54 +1100 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2007-10-03 11:48:44 +1000 |
| commit | 048c8bc90e53bf1f5feec020a7d482da94894e93 (patch) | |
| tree | 6ca0891ac3320706873006104cde3d4e1039bcfc /lib/Kconfig.debug | |
| parent | 5669c3cf19fbadaa9120b59914beec8431277efe (diff) | |
| download | lwn-048c8bc90e53bf1f5feec020a7d482da94894e93.tar.gz lwn-048c8bc90e53bf1f5feec020a7d482da94894e93.zip | |
[POWERPC] ppc64: support CONFIG_DEBUG_PREEMPT
Add CONFIG_DEBUG_PREEMPT support to ppc64: it was useful for testing
get_paca() preemption. Cheat a little, just use debug_smp_processor_id()
in the debug version of get_paca(): it contains all the right checks and
reporting, though get_paca() doesn't really use smp_processor_id().
Use local_paca for what might have been called __raw_get_paca().
Silence harmless warnings from io.h and lparcfg.c with local_paca -
it is okay for iseries_lparcfg_data to be referencing shared_proc
with preemption enabled: all cpus should show the same value for
shared_proc.
Why do other architectures need TRACE_IRQFLAGS_SUPPORT for DEBUG_PREEMPT?
I don't know, ppc64 appears to get along fine without it.
Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'lib/Kconfig.debug')
| -rw-r--r-- | lib/Kconfig.debug | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index 50a94eee4d92..51e2fd0d851c 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -167,7 +167,7 @@ config SLUB_DEBUG_ON config DEBUG_PREEMPT bool "Debug preemptible kernel" - depends on DEBUG_KERNEL && PREEMPT && TRACE_IRQFLAGS_SUPPORT + depends on DEBUG_KERNEL && PREEMPT && (TRACE_IRQFLAGS_SUPPORT || PPC64) default y help If you say Y here then the kernel will use a debug variant of the |