Messages in this thread Patch in this message | | | From | Josh Poimboeuf <> | Subject | [PATCH v3 17/51] x86/smp: fix initial idle stack location on 32-bit | Date | Fri, 12 Aug 2016 09:28:36 -0500 |
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On 32-bit, the initial idle stack calculation doesn't take into account the TOP_OF_KERNEL_STACK_PADDING, making the stack end address inconsistent with other tasks on 32-bit.
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> --- arch/x86/kernel/smpboot.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c index d9d3d67..1158a72 100644 --- a/arch/x86/kernel/smpboot.c +++ b/arch/x86/kernel/smpboot.c @@ -957,9 +957,7 @@ static int do_boot_cpu(int apicid, int cpu, struct task_struct *idle) int cpu0_nmi_registered = 0; unsigned long timeout; - idle->thread.sp = (unsigned long) (((struct pt_regs *) - (THREAD_SIZE + task_stack_page(idle))) - 1); - + idle->thread.sp = (unsigned long)task_pt_regs(idle); early_gdt_descr.address = (unsigned long)get_cpu_gdt_table(cpu); initial_code = (unsigned long)start_secondary; initial_stack = idle->thread.sp; -- 2.7.4
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