[PATCH] x86/um: fix vDSO installation

[Thomas Weißschuh]

The generic vDSO installation logic used by 'make vdso_install' requires
that $(vdso-install-y) is defined by the top-level architecture Makefile
and that it contains a path relative to the root of the tree.
For UML neither of these is satisfied.

Move the definition of $(vdso-install-y) to a place which is included by
the arch/um/Makefile and use the full relative path.

Fixes: f1c2bb8b9964 ("um: implement a x86_64 vDSO")
Signed-off-by: Thomas Weißschuh <linux@xxxxxxxxxxxxxx>
---
Not sure about the Fixes: tag. This seems to have never worked before
for all kinds of reasons.
---
 arch/x86/Makefile.um      | 2 ++
 arch/x86/um/vdso/Makefile | 2 --
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/Makefile.um b/arch/x86/Makefile.um
index c86cbd9cbba3..19c13afa474e 100644
--- a/arch/x86/Makefile.um
+++ b/arch/x86/Makefile.um
@@ -60,4 +60,6 @@ ELF_FORMAT := elf64-x86-64
 LINK-$(CONFIG_LD_SCRIPT_DYN_RPATH) += -Wl,-rpath,/lib64
 LINK-y += -m64
 
+vdso-install-y += arch/x86/um/vdso/vdso.so.dbg
+
 endif
diff --git a/arch/x86/um/vdso/Makefile b/arch/x86/um/vdso/Makefile
index 8a7c8b37cb6e..7664cbedbe30 100644
--- a/arch/x86/um/vdso/Makefile
+++ b/arch/x86/um/vdso/Makefile
@@ -3,8 +3,6 @@
 # Building vDSO images for x86.
 #
 
-vdso-install-y += vdso.so
-
 # files to link into the vdso
 vobjs-y := vdso-note.o um_vdso.o
 

---
base-commit: 3429028f9eb355654d81e02c22903e77075a4e8e
change-id: 20260318-um-vdso-install-037e08fdf913

Best regards,
-- 
Thomas Weißschuh <linux@xxxxxxxxxxxxxx>