Hi all,

On Fri, 19 Mar 2021 15:30:31 +0100 Heiko Carstens [off-list ref] wrote:

This breaks now on s390 with commit 8ef6f74a3571 ("Rust support").
make modules_install / depmod now fails with:

depmod: WARNING: /.../lib/modules/5.12.0-rc3-00001-g8ef6f74a3571/kernel/drivers/s390/scsi/zfcp.ko needs unknown symbol

for every module (yes, the line is complete).

Daniel Axtens reported the same breakage on powerpc.  I bisected it to
the same commit.  More experimentation shows that if you reverse just
the change to include/linux/moduleparam.h the above warnings go away.
So

-#define MAX_PARAM_PREFIX_LEN (256 - sizeof(unsigned long))
+#define MAX_PARAM_PREFIX_LEN (64 - sizeof(unsigned long))

fixes it up.  Not sure what that does to the rust support ...
-- 
Cheers,
Stephen Rothwell