On powerpc some symbols end up in the initialized data section, which
means they aren't detected by the logic in cmd_export, leading to errors
such as:

  ERROR: modpost: "_RNvNtCsbDqzXfLQacH_6kernel12module_param15PARAM_OPS_USIZE" [drivers/char/rust_example_4.ko] undefined!

nm represents the "initialized data section" with "D", so also look for
that when exporting symbols.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
---
 rust/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/rust/Makefile b/rust/Makefile
index eb8f12ce1644..4cddae9d4a25 100644
--- a/rust/Makefile
+++ b/rust/Makefile

@@ -73,7 +73,7 @@ $(objtree)/rust/bindings_generated.rs: $(srctree)/rust/kernel/bindings_helper.h
 quiet_cmd_exports = EXPORTS $@
       cmd_exports = \
 	$(NM) -p --defined-only $< \
-		| grep -E ' (T|R) ' | cut -d ' ' -f 3 | grep -E '^(__rust_|_R)' \
+		| grep -E ' (T|R|D) ' | cut -d ' ' -f 3 | grep -E '^(__rust_|_R)' \
 		| xargs -n1 -Isymbol \
 		echo 'EXPORT_SYMBOL$(exports_target_type)(symbol);' > $@
 

-- 
2.25.1