[PATCH 1/2] powerpc/vmlinux.lds: Explicitly retain .gnu.hash

[Michael Ellerman]

Relocatable kernel builds produce a warning about .gnu.hash being an
orphan section:

  ld: warning: orphan section `.gnu.hash' from `linker stubs' being placed in 
section `.gnu.hash'

If we try to discard it the build fails:

  ld -EL -m elf64lppc -pie --orphan-handling=warn --build-id -o
    .tmp_vmlinux1 -T ./arch/powerpc/kernel/vmlinux.lds --whole-archive
    arch/powerpc/kernel/head_64.o arch/powerpc/kernel/entry_64.o
    ...
    sound/built-in.a net/built-in.a virt/built-in.a --no-whole-archive
    --start-group lib/lib.a --end-group
  ld: could not find section .gnu.hash

So add an entry to explicitly retain it, as we do for .hash.

Signed-off-by: Michael Ellerman <m...@ellerman.id.au>
---
 arch/powerpc/kernel/vmlinux.lds.S | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/powerpc/kernel/vmlinux.lds.S 
b/arch/powerpc/kernel/vmlinux.lds.S
index b4c89a1acebb..31a0f201fb6f 100644
--- a/arch/powerpc/kernel/vmlinux.lds.S
+++ b/arch/powerpc/kernel/vmlinux.lds.S
@@ -256,6 +256,7 @@ SECTIONS
                *(.dynamic)
        }
        .hash : AT(ADDR(.hash) - LOAD_OFFSET) { *(.hash) }
+       .gnu.hash : AT(ADDR(.gnu.hash) - LOAD_OFFSET) { *(.gnu.hash) }
        .interp : AT(ADDR(.interp) - LOAD_OFFSET) { *(.interp) }
        .rela.dyn : AT(ADDR(.rela.dyn) - LOAD_OFFSET)
        {
-- 
2.21.1