[PATCH] Makefile: Make checkstack work with O= builds

[Stephen Boyd]

The vmlinux doesn't always live in the same directory as the
source files and so 'make O=obj checkstack' fails with a missing
vmlinux file. Fix checkstack so that this is possible.

Signed-off-by: Stephen Boyd <sboyd@xxxxxxxxxxxxxx>
---

It would also be nice if this depended on vmlinux and modules being built
already but I couldn't figure that part out.

 Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index 4fe0559..54a386b 100644
--- a/Makefile
+++ b/Makefile
@@ -1318,7 +1318,7 @@ else
 CHECKSTACK_ARCH := $(ARCH)
 endif
 checkstack:
-	$(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
+	$(OBJDUMP) -d $(objtree)/vmlinux $$(find $(objtree) -name '*.ko') | \
 	$(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
 
 kernelrelease:
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