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Groups > linux.kernel > #1488395
| From | Josh Poimboeuf <jpoimboe@redhat.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH v2 5/9] x86/smp: fix initial idle stack location on 32-bit |
| Date | 2016-09-21 23:10 +0200 |
| Message-ID | <sjWWd-5EH-13@gated-at.bofh.it> (permalink) |
| References | <sjWWd-5EH-5@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
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. Reviewed-by: Andy Lutomirski <luto@kernel.org> 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 039790b..9345072 100644 --- a/arch/x86/kernel/smpboot.c +++ b/arch/x86/kernel/smpboot.c @@ -963,9 +963,7 @@ 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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[PATCH v2 5/9] x86/smp: fix initial idle stack location on 32-bit Josh Poimboeuf <jpoimboe@redhat.com> - 2016-09-21 23:10 +0200
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