Re: [PATCH v2 08/11] selftests/mm: fix uffd-unit-tests.c build failure due to missing MADV_COLLAPSE

-- John Hubbard NVIDIA On 6/2/23 19:15, John Hubbard wrote: > MADV_PAGEOUT, MADV_POPULATE_READ, MADV_COLLAPSE are conditionally > defined as necessary. However, that was being done in .c files, and a > new build failure came up that would have been automatically avoided had > these been in a common header file. > > So consolidate and move them all to vm_util.h, which fixes the build > failure. > > An alternative approach from Muhammad Usama Anjum was: rely on "make > headers" being required, and include asm-generic/mman-common.h. This > works in the sense that it builds, but it still generates warnings about > duplicate MADV_* symbols, and the goal here is to get a fully clean (no > warnings) build here. > > Reviewed-by: David Hildenbrand david@redhat.com > Cc: Peter Xu peterx@redhat.com > Cc: Muhammad Usama Anjum usama.anjum@collabora.com > Signed-off-by: John Hubbard jhubbard@nvidia.com > --- > tools/testing/selftests/mm/cow.c | 7 ------- > tools/testing/selftests/mm/khugepaged.c | 10 ---------- > tools/testing/selftests/mm/vm_util.h | 10 ++++++++++ > 3 files changed, 10 insertions(+), 17 deletions(-) > > diff --git a/tools/testing/selftests/mm/cow.c b/tools/testing/selftests/mm/cow.c > index dc9d6fe86028..8882b05ec9c8 100644 > --- a/tools/testing/selftests/mm/cow.c > +++ b/tools/testing/selftests/mm/cow.c > @@ -30,13 +30,6 @@ > #include "../kselftest.h" > #include "vm_util.h" > > -#ifndef MADV_PAGEOUT > -#define MADV_PAGEOUT 21 > -#endif > -#ifndef MADV_COLLAPSE > -#define MADV_COLLAPSE 25 > -#endif > - > static size_t pagesize; > static int pagemap_fd; > static size_t thpsize; > diff --git a/tools/testing/selftests/mm/khugepaged.c b/tools/testing/selftests/mm/khugepaged.c > index 97adc0f34f9c..e88ee039d0eb 100644 > --- a/tools/testing/selftests/mm/khugepaged.c > +++ b/tools/testing/selftests/mm/khugepaged.c > @@ -22,16 +22,6 @@ > > #include "vm_util.h" > > -#ifndef MADV_PAGEOUT > -#define MADV_PAGEOUT 21 > -#endif > -#ifndef MADV_POPULATE_READ > -#define MADV_POPULATE_READ 22 > -#endif > -#ifndef MADV_COLLAPSE > -#define MADV_COLLAPSE 25 > -#endif > - > #define BASE_ADDR ((void *)(1UL << 30)) > static unsigned long hpage_pmd_size; > static unsigned long page_size; > diff --git a/tools/testing/selftests/mm/vm_util.h b/tools/testing/selftests/mm/vm_util.h > index b950bd16083a..07f39ed2efba 100644 > --- a/tools/testing/selftests/mm/vm_util.h > +++ b/tools/testing/selftests/mm/vm_util.h > @@ -63,3 +63,13 @@ int uffd_register_with_ioctls(int uffd, void *addr, uint64_t len, > > #define PAGEMAP_PRESENT(ent) (((ent) & (1ull << 63)) != 0) > #define PAGEMAP_PFN(ent) ((ent) & ((1ull << 55) - 1)) > + > +#ifndef MADV_PAGEOUT > +#define MADV_PAGEOUT 21 > +#endif > +#ifndef MADV_POPULATE_READ > +#define MADV_POPULATE_READ 22 > +#endif > +#ifndef MADV_COLLAPSE > +#define MADV_COLLAPSE 25 > +#endif