On Thu, Oct 11, 2018 at 03:43:59PM -0300, Rafael David Tinoco wrote: > MAP_FIXED is important for this test but, unfortunately, lowest virtual > address for user space mapping on arm is (PAGE_SIZE * 2) and NULL hint > does not seem to guarantee that when MAP_FIXED is given. This patch sets > the virtual address that will hold the mapping for the test, fixing the > issue. > > Link: https://bugs.linaro.org/show_bug.cgi?id=3782 > Signed-off-by: Rafael David Tinoco <rafael.tinoco@xxxxxxxxxx> > --- > tools/testing/selftests/proc/proc-self-map-files-002.c | 4 +++- > 1 file changed, 3 insertions(+), 1 deletion(-) > > diff --git a/tools/testing/selftests/proc/proc-self-map-files-002.c b/tools/testing/selftests/proc/proc-self-map-files-002.c > index 6f1f4a6e1ecb..0a47eaca732a 100644 > --- a/tools/testing/selftests/proc/proc-self-map-files-002.c > +++ b/tools/testing/selftests/proc/proc-self-map-files-002.c > @@ -55,7 +55,9 @@ int main(void) > if (fd == -1) > return 1; > > - p = mmap(NULL, PAGE_SIZE, PROT_NONE, MAP_PRIVATE|MAP_FILE|MAP_FIXED, fd, 0); > + p = mmap((void *) (2 * PAGE_SIZE), PAGE_SIZE, PROT_NONE, > + MAP_PRIVATE|MAP_FILE|MAP_FIXED, fd, 0); As the comment in the beginning says this test is specifically for addresss 0. Maybe it should be ifdeffed with __arm__ then.
