[PATCH v4 mips-next 4/7] MIPS: vmlinux.lds.S: catch bad .rel.dyn at link time

[Alexander Lobakin]

Catch any symbols placed in .rel.dyn and check for these sections
to be zero-sized at link time.
Eliminates following ld warning:

mips-alpine-linux-musl-ld: warning: orphan section `.rel.dyn'
from `init/main.o' being placed in section `.rel.dyn'

Adopted from x86/kernel/vmlinux.lds.S.

Suggested-by: Fangrui Song <mask...@google.com>
Signed-off-by: Alexander Lobakin <aloba...@pm.me>
---
 arch/mips/kernel/vmlinux.lds.S | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/arch/mips/kernel/vmlinux.lds.S b/arch/mips/kernel/vmlinux.lds.S
index 0f4e46ea4458..0f736d60d43e 100644
--- a/arch/mips/kernel/vmlinux.lds.S
+++ b/arch/mips/kernel/vmlinux.lds.S
@@ -226,4 +226,15 @@ SECTIONS
                *(.pdr)
                *(.reginfo)
        }
+
+       /*
+        * Sections that should stay zero sized, which is safer to
+        * explicitly check instead of blindly discarding.
+        */
+
+       .rel.dyn : {
+               *(.rel.*)
+               *(.rel_*)
+       }
+       ASSERT(SIZEOF(.rel.dyn) == 0, "Unexpected run-time relocations (.rel) 
detected!")
 }
-- 
2.30.0