From 60ac133aac9e07b94f2cb6bf571bf8aef69248c3 Mon Sep 17 00:00:00 2001 From: Nicolas Pitre Date: Wed, 12 Oct 2005 19:51:24 +0100 Subject: [PATCH] [ARM] 2974/1: fix ARM710 swi bug workaround Patch from Nicolas Pitre Either no one is using an ARM710 with recent kernels, or all ARM710s still in use are not afflicted by this swi bug. Nevertheless, the code to work around the ARM710 swi bug is itself currently buggy since it uses r8 as a pointer to S_PC while in fact it holds the spsr content these days. Fix that, and simplify the code as well. Signed-off-by: Nicolas Pitre Signed-off-by: Russell King --- arch/arm/kernel/entry-common.S | 7 +------ 1 file changed, 1 insertion(+), 6 deletions(-) diff --git a/arch/arm/kernel/entry-common.S b/arch/arm/kernel/entry-common.S index 81d450ac3fa..066597f4345 100644 --- a/arch/arm/kernel/entry-common.S +++ b/arch/arm/kernel/entry-common.S @@ -106,15 +106,10 @@ ENTRY(ret_from_fork) .endm .Larm700bug: - ldr r0, [sp, #S_PSR] @ Get calling cpsr - sub lr, lr, #4 - str lr, [r8] - msr spsr_cxsf, r0 ldmia sp, {r0 - lr}^ @ Get calling r0 - lr mov r0, r0 - ldr lr, [sp, #S_PC] @ Get PC add sp, sp, #S_FRAME_SIZE - movs pc, lr + subs pc, lr, #4 #else .macro arm710_bug_check, instr, temp .endm -- 2.20.1