Commit-ID: 135dcacd4ceac68aed843d391e29d821878c1cb0 Gitweb: http://git.kernel.org/tip/135dcacd4ceac68aed843d391e29d821878c1cb0 Author: Fenghua Yu <fenghua.yu@xxxxxxxxx> AuthorDate: Sat, 25 Aug 2012 10:41:23 -0700 Committer: H. Peter Anvin <hpa@xxxxxxxxxxxxxxx> CommitDate: Sat, 25 Aug 2012 19:26:07 -0700 x86-32, hotplug: Add start_cpu0() entry point to head_32.S start_cpu0() is defined in head_32.S for 32-bit. The function sets up stack and jumps to start_secondary() for CPU0 wake up. Signed-off-by: Fenghua Yu <fenghua.yu@xxxxxxxxx> Link: http://lkml.kernel.org/r/1345916488-8355-8-git-send-email-fenghua.yu@xxxxxxxxx Signed-off-by: H. Peter Anvin <hpa@xxxxxxxxxxxxxxx> --- arch/x86/kernel/head_32.S | 12 ++++++++++++ 1 files changed, 12 insertions(+), 0 deletions(-) diff --git a/arch/x86/kernel/head_32.S b/arch/x86/kernel/head_32.S index d42ab17..964f87a 100644 --- a/arch/x86/kernel/head_32.S +++ b/arch/x86/kernel/head_32.S @@ -266,6 +266,18 @@ num_subarch_entries = (. - subarch_entries) / 4 jmp default_entry #endif /* CONFIG_PARAVIRT */ +#ifdef CONFIG_HOTPLUG_CPU +/* + * Boot CPU0 entry point. It's called from play_dead(). Everything has been set + * up already except stack. We just set up stack here. Then call + * start_secondary(). + */ +ENTRY(start_cpu0) + movl stack_start, %ecx + movl %ecx, %esp + jmp *(initial_code) +#endif + /* * Non-boot CPU entry point; entered from trampoline.S * We can't lgdt here, because lgdt itself uses a data segment, but -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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