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* [RT] Compile error with certain IRQ debug config option combinations
@ 2008-02-14 15:48 kus Kusche Klaus
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From: kus Kusche Klaus @ 2008-02-14 15:48 UTC (permalink / raw)
To: linux-kernel, Ingo Molnar, Thomas Gleixner
I'm using 184.108.40.206 with -rt1 applied
(applies cleanly with some offsets) on x86.
I've *not* configured PROVE_LOCKING (too expensive).
However, I selected all the latency tracings, timings and histograms,
among them CRITICAL_IRQSOFF_TIMING.
This implicitly configures TRACE_IRQFLAGS.
However, TRACE_IRQFLAGS depends on PROVE_LOCKING, which is off
(and not implicitly selected).
With TRACE_IRQFLAGS on and PROVE_LOCKING off,
compilation of kernel/lockdep.c fails miserably:
kernel/lockdep.c: In function 'check_usage_forwards':
kernel/lockdep.c:1740: error: 'find_usage_bit' undeclared (first use in
kernel/lockdep.c:1740: error: (Each undeclared identifier is reported
kernel/lockdep.c:1740: error: for each function it appears in.)
kernel/lockdep.c:1742: error: implicit declaration of function
kernel/lockdep.c:1746: error: 'forwards_match' undeclared (first use in
kernel/lockdep.c: In function 'check_usage_backwards':
kernel/lockdep.c:1759: error: 'find_usage_bit' undeclared (first use in
kernel/lockdep.c:1761: error: implicit declaration of function
kernel/lockdep.c:1765: error: 'backwards_match' undeclared (first use in
make: *** [kernel/lockdep.o] Error 1
Looking at the source quickly,
it seems that the #ifdefs do not cover that combination correctly,
but I can't figure out how to fix that (the ifdef nesting in that file
seems to have grown over time...).
By the way: With all the tracing on,
make also tries to compile scripts/trace-it.c (with HOSTCC),
which also fails if the kernel is cross-compiled in a non-linux
(Interix in my case - don't ask me, I didn't vote for it...).
Many thanks in advance for any help!
Klaus Kusche, DI. Dr. Software Development - Control
KEBA AG Gewerbepark Urfahr, A-4041 Linz, Austria
www.keba.com Firmenbuchgericht Linz FN 184376 t
mailto:firstname.lastname@example.org Phone: +43 732 7090-23120 Fax: +43 732 7090-63401
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2008-02-14 15:48 [RT] Compile error with certain IRQ debug config option combinations kus Kusche Klaus
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