On Mon, Dec 8, 2014 at 9:03 PM, Andrew Morton <akpm@linux-foundation.org>
wrote:

> On Tue, 9 Dec 2014 02:40:09 +0800 kbuild test robot <
> fengguang.wu@intel.com> wrote:
>
> > tree:   git://
> git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
> > head:   cf12164be498180dc466ef97194ca7755ea39f3b
> > commit: b4baa9e36be0651f7eb15077af5e0eff53b7691b [10653/11539] x86: hook
> up execveat system call
> > reproduce:
> >   # apt-get install sparse
> >   git checkout b4baa9e36be0651f7eb15077af5e0eff53b7691b
> >   make ARCH=x86_64 allmodconfig
> >   make C=1 CF=-D__CHECK_ENDIAN__
> >
> >
> > sparse warnings: (new ones prefixed by >>)
> >
> >    arch/x86/ia32/audit.c:38:14: sparse: undefined identifier
> '__NR_execveat'
> > >> arch/x86/ia32/audit.c:38:14: sparse: incompatible types for 'case'
> statement
> >    arch/x86/ia32/audit.c:38:14: sparse: Expected constant expression in
> case statement
> >    arch/x86/ia32/audit.c: In function 'ia32_classify_syscall':
> >    arch/x86/ia32/audit.c:38:7: error: '__NR_execveat' undeclared (first
> use in this function)
> >      case __NR_execveat:
> >           ^
> >    arch/x86/ia32/audit.c:38:7: note: each undeclared identifier is
> reported only once for each function it appears in
> > --
>
> Confused. This makes no sense and I can't reproduce it.
>

Ditto.

Someone else did previously[1] have a build problem from a stale copy of
arch/x86/include/generated/asm/unistd_32.h in their tree, but I don't know
how that could happen.

[1] https://lkml.org/lkml/2014/11/25/542