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    SubjectRe: [PATCH] trace: Fix build breakage without CONFIG_PERF_EVENTS
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    On Tue, 2012-02-28 at 15:43 +0100, Jiri Olsa wrote:
    > On Tue, Feb 28, 2012 at 02:03:35PM +0000, Mark Brown wrote:
    > > On Tue, Feb 28, 2012 at 09:02:09AM -0500, Steven Rostedt wrote:
    > > > On Tue, 2012-02-28 at 13:37 +0000, Mark Brown wrote:
    > >
    > > > > ARM. If it was not possible to switch off PERF_EVENTS it shouldn't be a
    > > > > config option in the code as this is just creating complexity and
    > > > > potential breakage.
    > >
    > > > It is possible to switch off PERF_EVENTS, just not on x86 :-/
    > >
    > > Well, if you insist on using these restricted architectures :P
    >
    > reproduced ;) looking for fix..
    >
    > jirka
    >
    >
    > [jolsa@m tip]$ make ARCH=arm CROSS_COMPILE=armv5tel-redhat-linux-gnueabi- uImage
    > CHK include/linux/version.h
    > CHK include/generated/utsrelease.h
    > make[1]: `include/generated/mach-types.h' is up to date.
    > CALL scripts/checksyscalls.sh
    > CHK include/generated/compile.h
    > CC kernel/trace/trace_export.o
    > In file included from kernel/trace/trace_export.c:197:
    > kernel/trace/trace_entries.h:58: error: ‘perf_ftrace_event_register’
    > undeclared here (not in a function)
    > make[2]: *** [kernel/trace/trace_export.o] Error 1
    > make[1]: *** [kernel/trace] Error 2
    > make: *** [kernel] Error 2

    Hmm, I'm surprised my cross build test didn't catch this.

    Crap, I think I only ran the defconfig tests, and not the test that also
    enables tracing.

    I'll update my config to do both automatically.

    Thanks!

    -- Steve


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