[PATCH v2] uml: audio: fix -Wmissing-variable-declarations

[Nick Desaulniers]

I'm looking to enable -Wmissing-variable-declarations behind W=1. 0day
bot spotted the following instance:

  arch/um/drivers/hostaudio_kern.c:316:3: warning: no previous extern
  declaration for non-static variable 'module_data'
  [-Wmissing-variable-declarations]
  } module_data;
    ^
  arch/um/drivers/hostaudio_kern.c:313:1: note: declare 'static' if the
  variable is not intended to be used outside of this translation unit
  struct {
  ^

This symbol is not referenced by more than one translation unit, so give
it static storage.

Reported-by: kernel test robot <lkp@xxxxxxxxx>
Closes: https://lore.kernel.org/llvm/202308081050.sZEw4cQ5-lkp@xxxxxxxxx/
Signed-off-by: Nick Desaulniers <ndesaulniers@xxxxxxxxxx>
---
Changes in v2:
- Fix kbuild test report lore link.
- Link to v1: https://lore.kernel.org/r/20230808-um_hostaudio-v1-1-3d40fbe1fb1e@xxxxxxxxxx
---
 arch/um/drivers/hostaudio_kern.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/um/drivers/hostaudio_kern.c b/arch/um/drivers/hostaudio_kern.c
index 5b064d360cb7..c42b793bce65 100644
--- a/arch/um/drivers/hostaudio_kern.c
+++ b/arch/um/drivers/hostaudio_kern.c
@@ -310,7 +310,7 @@ static const struct file_operations hostmixer_fops = {
 	.release        = hostmixer_release,
 };
 
-struct {
+static struct {
 	int dev_audio;
 	int dev_mixer;
 } module_data;

---
base-commit: 14f9643dc90adea074a0ffb7a17d337eafc6a5cc
change-id: 20230808-um_hostaudio-21d7207deaed

Best regards,
-- 
Nick Desaulniers <ndesaulniers@xxxxxxxxxx>