The following compilation error occurs with an old version of glibc due to
a recent commit adding MADV_COLLAPSE testing:
[root@localhost mm]# getconf GNU_LIBC_VERSION
glibc 2.34
[root@localhost mm]# make
CC hmm-tests
hmm-tests.c: In function 'hmm_migrate_anon_huge_fault':
hmm-tests.c:2355:27: error: 'MADV_COLLAPSE' undeclared (first use in this
function); did you mean 'MADV_COLD'?
2355 | ret = madvise(map, size, MADV_COLLAPSE);
| ^~~~~~~~~~~~~
| MADV_COLD
hmm-tests.c:2355:27: note: each undeclared identifier is reported only once
for each function it appears in
make: *** [../lib.mk:225:
/root/code/linux/tools/testing/selftests/mm/hmm-tests] Error 1
Include linux/mman.h (which provides the definition of MADV_COLLAPSE) to
fix the build error.
Fixes: e3d8707358ea ("selftests/mm/hmm-tests: test pagemap reads of PMD
device-private entries")
Signed-off-by: Zenghui Yu <[email protected]>
---
tools/testing/selftests/mm/hmm-tests.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/tools/testing/selftests/mm/hmm-tests.c
b/tools/testing/selftests/mm/hmm-tests.c
index e4c49699f3f7..2f2b9879d100 100644
--- a/tools/testing/selftests/mm/hmm-tests.c
+++ b/tools/testing/selftests/mm/hmm-tests.c
@@ -23,6 +23,7 @@
#include <time.h>
#include <pthread.h>
#include <limits.h>
+#include <linux/mman.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/mman.h>
--
2.53.0
