powerpc/32: Include .branch_lt in data section

commit 98ecc6768e8fdba95da1fc1efa0ef2d769e7fe1c upstream.

When building a 32 bit powerpc kernel with Binutils 2.31.1 this warning
is emitted:

 powerpc-linux-gnu-ld: warning: orphan section `.branch_lt' from
 `arch/powerpc/kernel/head_44x.o' being placed in section `.branch_lt'

As of binutils commit 2d7ad24e8726 ("Support PLT16 relocs against local
symbols")[1], 32 bit targets can produce .branch_lt sections in their
output.

Include these symbols in the .data section as the ppc64 kernel does.

[1] https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;a=commitdiff;h=2d7ad24e8726ba4c45c9e67be08223a146a837ce
Signed-off-by: Joel Stanley <joel@jms.id.au>
Reviewed-by: Alan Modra <amodra@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/arch/powerpc/kernel/vmlinux.lds.S b/arch/powerpc/kernel/vmlinux.lds.S
index efb9a6982561c2a4152d04484ec205b9f597e5cf..7346875ac61ddb72bd43045865553fe3c532fc5a 100644 (file)
--- a/arch/powerpc/kernel/vmlinux.lds.S
+++ b/arch/powerpc/kernel/vmlinux.lds.S
@@ -322,6 +322,7 @@ SECTIONS
                *(.sdata2)
                *(.got.plt) *(.got)
                *(.plt)
+               *(.branch_lt)
        }
 #else
        .data : AT(ADDR(.data) - LOAD_OFFSET) {