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authorAnton Vorontsov <avorontsov@ru.mvista.com>2009-03-24 01:07:24 +0300
committerIngo Molnar <mingo@elte.hu>2009-03-23 23:23:03 +0100
commit45b9560895b07a4a09d55d49235c984db512c5aa (patch)
tree327ccd6be20791915007137c7db64361c1eef6e6 /kernel/trace
parent3e1f60b80cafcb5d7e8d3665b35962fbb8fb9efa (diff)
tracing: Fix TRACING_SUPPORT dependency for PPC32
commit 40ada30f9621fbd831ac2437b9a2a399aa ("tracing: clean up menu"), despite the "clean up" in its purpose, introduced a behavioural change for Kconfig symbols: we no longer able to select tracing support on PPC32 (because IRQFLAGS_SUPPORT isn't yet implemented). The IRQFLAGS_SUPPORT is not mandatory for most tracers, tracing core has a special case for platforms w/o irqflags (which, by the way, has become useless as of the commit above). Though according to Ingo Molnar, there was periodic build failures on weird, unmaintained architectures that had no irqflags-tracing support and hence didn't know the raw_irqs_save/restore primitives. Thus we'd better not enable irqflags-less tracing for all architectures. This patch restores the old behaviour for PPC32, and thus brings the tracing back. Other architectures can either add themselves to the exception list or (better) implement TRACE_IRQFLAGS_SUPPORT. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Acked-b: Steven Rostedt <rostedt@goodmis.org> Cc: linuxppc-dev@ozlabs.org LKML-Reference: <20090323220724.GA9851@oksana.dev.rtsoft.ru> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/trace')
-rw-r--r--kernel/trace/Kconfig6
1 files changed, 5 insertions, 1 deletions
diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig
index b0a46f88965..8a4d7293104 100644
--- a/kernel/trace/Kconfig
+++ b/kernel/trace/Kconfig
@@ -63,7 +63,11 @@ config TRACING
#
config TRACING_SUPPORT
bool
- depends on TRACE_IRQFLAGS_SUPPORT
+ # PPC32 has no irqflags tracing support, but it can use most of the
+ # tracers anyway, they were tested to build and work. Note that new
+ # exceptions to this list aren't welcomed, better implement the
+ # irqflags tracing for your architecture.
+ depends on TRACE_IRQFLAGS_SUPPORT || PPC32
depends on STACKTRACE_SUPPORT
default y