[PATCH v2] selftests/kexec: fix test_kexec_jump build

[Moon Hee Lee <moonhee.lee.ca@gmail.com>]

The test_kexec_jump program builds correctly when invoked from the top-level
selftests/Makefile, which explicitly sets the OUTPUT variable. However,
building directly in tools/testing/selftests/kexec fails with:

  make: *** No rule to make target '/test_kexec_jump', needed by 'test_kexec_jump.sh'.  Stop.

This failure occurs because the Makefile rule relies on $(OUTPUT), which is
undefined in direct builds.

Fix this by listing test_kexec_jump in TEST_GEN_PROGS, the standard way to
declare generated test binaries in the kselftest framework. This ensures the
binary is built regardless of invocation context and properly removed by
make clean.

Acked-by: Shuah Khan <skhan@linuxfoundation.org>
Signed-off-by: Moon Hee Lee <moonhee.lee.ca@gmail.com>
---
Changes in v2:
- Dropped the .gitignore addition, as it is already handled in [1]

[1] https://lore.kernel.org/r/20250623232549.3263273-1-dyudaken@gmail.com


 tools/testing/selftests/kexec/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/kexec/Makefile b/tools/testing/selftests/kexec/Makefile
index e3000ccb9a5d..874cfdd3b75b 100644
--- a/tools/testing/selftests/kexec/Makefile
+++ b/tools/testing/selftests/kexec/Makefile
@@ -12,7 +12,7 @@ include ../../../scripts/Makefile.arch
 
 ifeq ($(IS_64_BIT)$(ARCH_PROCESSED),1x86)
 TEST_PROGS += test_kexec_jump.sh
-test_kexec_jump.sh: $(OUTPUT)/test_kexec_jump
+TEST_GEN_PROGS := test_kexec_jump
 endif
 
 include ../lib.mk
-- 
2.43.0