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userfaultfd: selftest: only warn if __NR_userfaultfd is undefined

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If __NR_userfaultfd is not yet defined by the arch, warn but still build
and run the userfaultfd selftest successfully.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: Dr. David Alan Gilbert <dgilbert@redhat.com>
Cc: Shuah Khan <shuahkh@osg.samsung.com>
Cc: Thierry Reding <treding@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Michael Ellerman 2015-09-22 14:58:58 -07:00 committed by Linus Torvalds
parent 67f6a029b2
commit 56ed8f169e
1 changed files with 13 additions and 3 deletions
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16
tools/testing/selftests/vm/userfaultfd.c
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@ -66,9 +66,7 @@
#include <pthread.h>
#include <linux/userfaultfd.h>
#ifndef __NR_userfaultfd
#error "missing __NR_userfaultfd definition"
#endif
#ifdef __NR_userfaultfd
static unsigned long nr_cpus, nr_pages, nr_pages_per_cpu, page_size;
@ -631,3 +629,15 @@ int main(int argc, char **argv)
nr_pages, nr_pages_per_cpu);
return userfaultfd_stress();
}
#else /* __NR_userfaultfd */
#warning "missing __NR_userfaultfd definition"
int main(void)
{
printf("skip: Skipping userfaultfd test (missing __NR_userfaultfd)\n");
return 0;
}
#endif /* __NR_userfaultfd */