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SubjectRe: -rt doesn't compile for UML

* Miklos Szeredi <miklos@szeredi.hu> wrote:

> > so there's no forced need to use -rt.
>
> Ah, forgotten about that.
>
> Unfortunately the latency tracer patch doesn't compile either:
>
> CC kernel/latency_trace.o
> kernel/latency_trace.c:28:21: error: asm/rtc.h: No such file or directory
> kernel/latency_trace.c:63:3: error: #error Implement cycles_to_usecs.
> kernel/latency_trace.c: In function ???____trace???:
> kernel/latency_trace.c:658: error: implicit declaration of function ???irqs_disabled_flags???
> make[1]: *** [kernel/latency_trace.o] Error 1

hm, just fill those functions in - should be fairly trivial and we can
carry those patches in -rt. (I'd suggest to create an empty asm-um/rtc.h
stub as well, for consistency.)

Ingo
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