rust_binder: Fix build failure if !CONFIG_COMPAT

The bindgen utility cannot handle "#define compat_ptr_ioctl NULL" in the
C header, so we need to handle this case on our own.

Simply skip this field in the initializer when !CONFIG_COMPAT as the
SAFETY comment above this initializer implies this is allowed.

Reported-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
Closes: https://lore.kernel.org/all/CANiq72mrVzqXnAV=Hy2XBOonLHA6YQgH-ckZoc_h0VBvTGK8rA@mail.gmail.com/
Signed-off-by: Xi Ruoyao <xry111@xry111.site>
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Link: https://patch.msgid.link/20251209125029.1117897-1-xry111@xry111.site
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/android/binder/rust_binder_main.rs b/drivers/android/binder/rust_binder_main.rs
index 08060ecc9ba4c018b5d0947beb7324ec9a1163ce..d84c3c360be0ee79e4dab22d613bc927a70895a7 100644 (file)
--- a/drivers/android/binder/rust_binder_main.rs
+++ b/drivers/android/binder/rust_binder_main.rs
@@ -322,6 +322,7 @@ pub static rust_binder_fops: AssertSync<kernel::bindings::file_operations> = {
         owner: THIS_MODULE.as_ptr(),
         poll: Some(rust_binder_poll),
         unlocked_ioctl: Some(rust_binder_ioctl),
+        #[cfg(CONFIG_COMPAT)]
         compat_ioctl: Some(bindings::compat_ptr_ioctl),
         mmap: Some(rust_binder_mmap),
         open: Some(rust_binder_open),