[PATCH 4/6] kselftest/arm64: Initialise current at build time in signal tests

[Mark Brown]

When building with clang the toolchain refuses to link the signals
testcases since the assembly code has a reference to current which has
no initialiser so is placed in the BSS:

  /tmp/signals-af2042.o: in function `fake_sigreturn':
  <unknown>:51:(.text+0x40): relocation truncated to fit: R_AARCH64_LD_PREL_LO19 against symbol `current' defined in .bss section in /tmp/test_signals-ec1160.o

Since the first statement in main() initialises current we may as well
fix this by moving the initialisation to build time so the variable
doesn't end up in the BSS.

Signed-off-by: Mark Brown <broonie at kernel.org>
---
 tools/testing/selftests/arm64/signal/test_signals.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/tools/testing/selftests/arm64/signal/test_signals.c b/tools/testing/selftests/arm64/signal/test_signals.c
index 416b1ff43199..00051b40d71e 100644
--- a/tools/testing/selftests/arm64/signal/test_signals.c
+++ b/tools/testing/selftests/arm64/signal/test_signals.c
@@ -12,12 +12,10 @@
 #include "test_signals.h"
 #include "test_signals_utils.h"
 
-struct tdescr *current;
+struct tdescr *current = &tde;
 
 int main(int argc, char *argv[])
 {
-	current = &tde;
-
 	ksft_print_msg("%s :: %s\n", current->name, current->descr);
 	if (test_setup(current) && test_init(current)) {
 		test_run(current);

-- 
2.30.2