On 8/6/26 22:21, Lorenzo Stoakes (ARM) wrote: > Now we've made MAP_PRIVATE-mapped /dev/zero mappings truly anonymous, add a > VMA userland test to assert that this is the case and everything is as > we would expect for an anonymous mapping. > > Signed-off-by: Lorenzo Stoakes (ARM) <[email protected]> > --- > tools/testing/vma/include/dup.h | 1 + > tools/testing/vma/tests/mmap.c | 50 > +++++++++++++++++++++++++++++++++++++++++ > 2 files changed, 51 insertions(+) > > diff --git a/tools/testing/vma/include/dup.h b/tools/testing/vma/include/dup.h > index aee36707abdd..41203b1c2323 100644 > --- a/tools/testing/vma/include/dup.h > +++ b/tools/testing/vma/include/dup.h > @@ -20,6 +20,7 @@ struct task_struct *get_current(void); > > #define MAJOR(dev) ((unsigned int) ((dev) >> MINORBITS)) > #define MINOR(dev) ((unsigned int) ((dev) & MINORMASK)) > +#define MKDEV(ma, mi) (((ma) << MINORBITS) | (mi)) > > #define S_IFMT 00170000 > #define S_IFCHR 0020000 > diff --git a/tools/testing/vma/tests/mmap.c b/tools/testing/vma/tests/mmap.c > index c85bc000d1cb..ebe01362e530 100644 > --- a/tools/testing/vma/tests/mmap.c > +++ b/tools/testing/vma/tests/mmap.c > @@ -45,7 +45,57 @@ static bool test_mmap_region_basic(void) > return true; > } > > +static int dummy_mmap_prepare(struct vm_area_desc *desc) > +{ > + return 0; > +} > + > +static bool test_pure_anon_dev_zero(void) > +{
Ah, just one comment: should we call this something like "test_map_private_dev_zero", at least that'd be clearer for me. -- Cheers, David
