Re: Linux 4.15-rc3 (uml + bpf_perf_event.h)

On 12/11/2017 06:27 PM, Randy Dunlap wrote:

On 12/11/2017 02:19 AM, Daniel Borkmann wrote:

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Hi Randy, hi Richard, [ +Hendrik for c895f6f703ad7dd2f ]

On 12/11/2017 09:32 AM, Richard Weinberger wrote:

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Randy,

Am Montag, 11. Dezember 2017, 03:42:12 CET schrieb Randy Dunlap:

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On 12/10/2017 06:08 PM, Linus Torvalds wrote:

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Another week, another rc.

um (uml) won't build on i386 or x86_64:

  CC      init/main.o
In file included from ../include/linux/perf_event.h:18:0,
                 from ../include/linux/trace_events.h:10,
                 from ../include/trace/syscall.h:7,
                 from ../include/linux/syscalls.h:82,
                 from ../init/main.c:20:
../include/uapi/linux/bpf_perf_event.h:11:32: fatal error:
asm/bpf_perf_event.h: No such file or directory #include
<asm/bpf_perf_event.h>
                                ^
compilation terminated.
../scripts/Makefile.build:310: recipe for target 'init/main.o' failed

How do you trigger that build failure?
Can you share your .config?

Richard, it's just defconfig on both i386 and x86_64.

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Hmm, too bad kbuild bot doesn't catch issues on uml. I'm not too familiar
with uml, but looks like it's the only special case where there's no
arch/um/include/uapi/asm/. What is the usual convention to pull in such
headers in this case? Something like the below, would that fix it for you?

Thanks for your help,
Daniel

Yes, that patch works.  Thanks.

Thanks, I'd get it out later today, and route it via bpf tree.