Messages in this thread | | | Subject | [RT] Compile error with certain IRQ debug config option combinations | Date | Thu, 14 Feb 2008 16:48:05 +0100 | From | "kus Kusche Klaus" <> |
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I'm using 2.6.24.2 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: CC kernel/lockdep.o kernel/lockdep.c: In function 'check_usage_forwards': kernel/lockdep.c:1740: error: 'find_usage_bit' undeclared (first use in this function) kernel/lockdep.c:1740: error: (Each undeclared identifier is reported only once kernel/lockdep.c:1740: error: for each function it appears in.) kernel/lockdep.c:1742: error: implicit declaration of function 'find_usage_forwards' kernel/lockdep.c:1746: error: 'forwards_match' undeclared (first use in this function) kernel/lockdep.c: In function 'check_usage_backwards': kernel/lockdep.c:1759: error: 'find_usage_bit' undeclared (first use in this function) kernel/lockdep.c:1761: error: implicit declaration of function 'find_usage_backwards' kernel/lockdep.c:1765: error: 'backwards_match' undeclared (first use in this function) make[1]: *** [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 development environment (Interix in my case - don't ask me, I didn't vote for it...).
Many thanks in advance for any help!
Greetings
-- Klaus Kusche, DI. Dr. Software Development - Control KEBA AG Gewerbepark Urfahr, A-4041 Linz, Austria www.keba.com Firmenbuchgericht Linz FN 184376 t mailto:kus@keba.com Phone: +43 732 7090-23120 Fax: +43 732 7090-63401
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