[PATCH v1 0/2] selftests/mm: thuge-gen defines

Edward Liaw
2024-06-05T22:36:49Z

When compiling with Android bionic, the MAP_HUGE_* and SHM_HUGE_* macros
are redefined because they are included from the uapi by sys/mman.h and
sys/shm.h:

INFO: From Compiling common/tools/testing/selftests/mm/thuge-gen.c:
common/tools/testing/selftests/mm/thuge-gen.c:32:9: warning: 'MAP_HUGE_2MB' macro redefined [-Wmacro-redefined]
32 | #define MAP_HUGE_2MB (21 << MAP_HUGE_SHIFT)
| ^
external/_main~_repo_rules~prebuilt_ndk/toolchains/llvm/prebuilt/linux-x86_64/sysroot/usr/include/linux/mman.h:38:9: note: previous definition is here
38 | #define MAP_HUGE_2MB HUGETLB_FLAG_ENCODE_2MB
| ^
common/tools/testing/selftests/mm/thuge-gen.c:33:9: warning: 'MAP_HUGE_1GB' macro redefined [-Wmacro-redefined]
33 | #define MAP_HUGE_1GB (30 << MAP_HUGE_SHIFT)
| ^
external/_main~_repo_rules~prebuilt_ndk/toolchains/llvm/prebuilt/linux-x86_64/sysroot/usr/include/linux/mman.h:44:9: note: previous definition is here

This test should probably use the uapi definitions instead of redefining
them. However, glibc gets struct redefinitions when including sys/shm.h
and linux/shm.h together. So, add guards for the SHM_HUGE_* macros
instead.

Edward Liaw (2):
selftests/mm: Include linux/mman.h
selftests/mm: Guard defines from shm

tools/testing/selftests/mm/thuge-gen.c | 13 +++++++++----
1 file changed, 9 insertions(+), 4 deletions(-)

--
2.45.1.467.gbab1589fc0-goog