From: Jinrong Liang cloudliang@tencent.com
commit 561cafebb2cf97b0927b4fb0eba22de6200f682e upstream.
The following warning appears when executing: make -C tools/testing/selftests/kvm
rseq_test.c: In function ‘main’: rseq_test.c:237:33: warning: implicit declaration of function ‘gettid’; did you mean ‘getgid’? [-Wimplicit-function-declaration] (void *)(unsigned long)gettid()); ^~~~~~ getgid /usr/bin/ld: /tmp/ccr5mMko.o: in function `main': ../kvm/tools/testing/selftests/kvm/rseq_test.c:237: undefined reference to `gettid' collect2: error: ld returned 1 exit status make: *** [../lib.mk:173: ../kvm/tools/testing/selftests/kvm/rseq_test] Error 1
Use the more compatible syscall(SYS_gettid) instead of gettid() to fix it. More subsequent reuse may cause it to be wrapped in a lib file.
Signed-off-by: Jinrong Liang cloudliang@tencent.com Message-Id: 20220802071240.84626-1-cloudliang@tencent.com Signed-off-by: Paolo Bonzini pbonzini@redhat.com Cc: Harshit Mogalapalli harshit.m.mogalapalli@oracle.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- tools/testing/selftests/kvm/rseq_test.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/tools/testing/selftests/kvm/rseq_test.c +++ b/tools/testing/selftests/kvm/rseq_test.c @@ -233,7 +233,7 @@ 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(vm, VCPU_ID);