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arm64: fix undefined reference to 'printk' 

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: a257e02579 ("arm64/kernel: don't ban ADRP to work around Cortex-A53 erratum #843419")
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Arnd Bergmann 2018-03-13 12:41:41 +01:00 committed by Will Deacon
parent 654c39c798
commit bd99f9a159
2 changed files with 3 additions and 3 deletions
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2
arch/arm64/kernel/reloc_test_core.c
View File

@ -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 },

4
arch/arm64/kernel/reloc_test_syms.S
View File

@ -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)