The fix for commit e923b0537d28 ("KVM: selftests: Fix target thread to be migrated in rseq_test")
added a call to gettid() which was only added to glibc-2.30 and fails to
compile with older glibc versions.
rseq_test.c: In function 'main':
rseq_test.c:230:33: warning: implicit declaration of function 'gettid'; did you mean 'getgid'? [-Wimplicit-function-declaration]
(void *)(unsigned long)gettid());
^~~~~~
getgid
Switch the call to syscall(SYS_gettid) which was the original advice in the
gettid(2) NOTES section and which works with both new and older glibc versions.
Fixes: e923b0537d28 ("KVM: selftests: Fix target thread to be migrated in rseq_test")
Cc: stable@xxxxxxxxxxxxxxx # v5.15
Signed-off-by: Liam Merwick <liam.merwick@xxxxxxxxxx>
---
Verified with glibc-2.28 and glibc-2.34 and ensured test case from e923b0537d28 still passes.
tools/testing/selftests/kvm/rseq_test.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/testing/selftests/kvm/rseq_test.c b/tools/testing/selftests/kvm/rseq_test.c
index fac248a43666..6f88da7e60be 100644
--- a/tools/testing/selftests/kvm/rseq_test.c
+++ b/tools/testing/selftests/kvm/rseq_test.c
@@ -227,7 +227,7 @@ int main(int argc, char *argv[])
ucall_init(vm, NULL);
pthread_create(&migration_thread, NULL, migration_worker,
- (void *)(unsigned long)gettid());
+ (void *)(unsigned long)syscall(SYS_gettid));
for (i = 0; !done; i++) {
vcpu_run(vcpu);
--
2.31.1
