Kbuild changes the working directory until it matches $(abs_objtree).

When $(need-sub-make) is empty, $(abs_objtree) is the same as $(CURDIR).

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nicolas Schier <n.schier@avm.de>
---

(no changes since v1)

 Makefile | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index 8dceb6830486..891d28e54791 100644
--- a/Makefile
+++ b/Makefile
@@ -228,12 +228,12 @@ else # need-sub-make
 
 # We process the rest of the Makefile if this is the final invocation of make
 
-ifeq ($(abs_srctree),$(abs_objtree))
+ifeq ($(abs_srctree),$(CURDIR))
         # building in the source tree
         srctree := .
 	building_out_of_srctree :=
 else
-        ifeq ($(abs_srctree)/,$(dir $(abs_objtree)))
+        ifeq ($(abs_srctree)/,$(dir $(CURDIR)))
                 # building in a subdirectory of the source tree
                 srctree := ..
         else
-- 
2.43.0