rust: kbuild: auto generate helper exports

This removes the need to explicitly export all symbols.

Generate helper exports similarly to what's currently done for Rust
crates. These helpers are exclusively called from within Rust code and
therefore can be treated similar as other Rust symbols.

Signed-off-by: Gary Guo <[email protected]>
Reviewed-by: Boqun Feng <[email protected]>
Tested-by: Boqun Feng <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
[ Fixed dependency path, reworded slightly, edited comment a bit and
  rebased on top of the changes made when applying Andreas' patch
  (e.g. no `README.md` anymore, so moved the edits).  - Miguel ]
Signed-off-by: Miguel Ojeda <[email protected]>

1 files changed, 0 insertions, 3 deletions

diff --git a/rust/helpers/refcount.c b/rust/helpers/refcount.c
index 13ab64805f77..f47afc148ec3 100644
--- a/rust/helpers/refcount.c
+++ b/rust/helpers/refcount.c
@@ -7,16 +7,13 @@ refcount_t rust_helper_REFCOUNT_INIT(int n)
 {
 	return (refcount_t)REFCOUNT_INIT(n);
 }
-EXPORT_SYMBOL_GPL(rust_helper_REFCOUNT_INIT);
 
 void rust_helper_refcount_inc(refcount_t *r)
 {
 	refcount_inc(r);
 }
-EXPORT_SYMBOL_GPL(rust_helper_refcount_inc);
 
 bool rust_helper_refcount_dec_and_test(refcount_t *r)
 {
 	return refcount_dec_and_test(r);
 }
-EXPORT_SYMBOL_GPL(rust_helper_refcount_dec_and_test);