[PATCH 07/30] ARM: head: use PC-relative insn sequence for __smp_alt
From: Ard Biesheuvel <hidden>
Date: 2017-08-14 12:53:48
Subsystem:
arm port, the rest · Maintainers:
Russell King, Linus Torvalds
Replace the open coded PC relative offset calculations with a pair of adr_l invocations. This ensures these quantities are invariant under runtime relocation. Cc: Russell King <linux@armlinux.org.uk> Signed-off-by: Ard Biesheuvel <redacted> --- arch/arm/kernel/head.S | 12 ++---------- 1 file changed, 2 insertions(+), 10 deletions(-)
diff --git a/arch/arm/kernel/head.S b/arch/arm/kernel/head.S
index ec22f42fd8bb..db6b823f20a4 100644
--- a/arch/arm/kernel/head.S
+++ b/arch/arm/kernel/head.S@@ -523,19 +523,11 @@ ARM_BE8(rev r0, r0) @ byteswap if big endian retne lr __fixup_smp_on_up: - adr r0, 1f - ldmia r0, {r3 - r5} - sub r3, r0, r3 - add r4, r4, r3 - add r5, r5, r3 + adr_l r4, __smpalt_begin + adr_l r5, __smpalt_end b __do_fixup_smp_on_up ENDPROC(__fixup_smp) - .align -1: .word . - .word __smpalt_begin - .word __smpalt_end - .pushsection .data .globl smp_on_up smp_on_up:
--
2.11.0