[PATCH v2] arm64: fix undefined reference to 'printk'

[Arnd Bergmann]

The printk symbol was intended as a generic address that is always
exported, however that turned out to be false with CONFIG_PRINTK=n:

ERROR: "printk" [arch/arm64/kernel/arm64-reloc-test.ko] undefined!

This changes the references to memstart_addr, which should be there
regardless of configuration.

Fixes: a257e02579e4 ("arm64/kernel: don't ban ADRP to work around Cortex-A53 
erratum #843419")
Acked-by: Ard Biesheuvel <ard.biesheu...@linaro.org>
Signed-off-by: Arnd Bergmann <a...@arndb.de>
---
v2: fix changelog as pointed out by Ard

 arch/arm64/kernel/reloc_test_core.c | 2 +-
 arch/arm64/kernel/reloc_test_syms.S | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/arm64/kernel/reloc_test_core.c 
b/arch/arm64/kernel/reloc_test_core.c
index a70489c584c7..5915ce5759cc 100644
--- a/arch/arm64/kernel/reloc_test_core.c
+++ b/arch/arm64/kernel/reloc_test_core.c
@@ -45,7 +45,7 @@ static struct {
        { "R_AARCH64_MOVW_SABS_Gn",     signed_movw, UL(SYM64_ABS_VAL) },
        { "R_AARCH64_MOVW_UABS_Gn",     unsigned_movw, UL(SYM64_ABS_VAL) },
        { "R_AARCH64_ADR_PREL_PG_HI21", relative_adrp, (u64)&sym64_rel },
-       { "R_AARCH64_ADR_PREL_PG_HI21", relative_adrp_far, (u64)&printk },
+       { "R_AARCH64_ADR_PREL_PG_HI21", relative_adrp_far, (u64)&memstart_addr 
},
        { "R_AARCH64_ADR_PREL_LO21",    relative_adr, (u64)&sym64_rel },
        { "R_AARCH64_PREL64",           relative_data64, (u64)&sym64_rel },
        { "R_AARCH64_PREL32",           relative_data32, (u64)&sym64_rel },
diff --git a/arch/arm64/kernel/reloc_test_syms.S 
b/arch/arm64/kernel/reloc_test_syms.S
index f333b4b7880d..2b8d9cb8b078 100644
--- a/arch/arm64/kernel/reloc_test_syms.S
+++ b/arch/arm64/kernel/reloc_test_syms.S
@@ -54,8 +54,8 @@ ENDPROC(relative_adrp)
        .align  12
        .space  0xffc
 ENTRY(relative_adrp_far)
-       adrp    x0, printk
-       add     x0, x0, #:lo12:printk
+       adrp    x0, memstart_addr
+       add     x0, x0, #:lo12:memstart_addr
        ret
 ENDPROC(relative_adrp_far)
 
-- 
2.9.0