[tip:x86/asm] x86-64: Simplify loading initial_gs
in [Kernel]
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From: tip-bot for Brian Gerst on 22 Jul 2010 01:10 Commit-ID: 650fb4393dff543bc980d361555c489fbdeed088 Gitweb: http://git.kernel.org/tip/650fb4393dff543bc980d361555c489fbdeed088 Author: Brian Gerst <brgerst(a)gmail.com> AuthorDate: Sat, 17 Jul 2010 09:03:28 -0400 Committer: H. Peter Anvin <hpa(a)zytor.com> CommitDate: Wed, 21 Jul 2010 21:23:51 -0700 x86-64: Simplify loading initial_gs Load initial_gs as two 32-bit values instead of splitting a 64-bit value. Signed-off-by: Brian Gerst <brgerst(a)gmail.com> LKML-Reference: <1279371808-24804-3-git-send-email-brgerst(a)gmail.com> Reviewed-by: Pekka Enberg <penberg(a)cs.helsinki.fi> Signed-off-by: H. Peter Anvin <hpa(a)zytor.com> --- arch/x86/kernel/head_64.S | 5 ++--- 1 files changed, 2 insertions(+), 3 deletions(-) diff --git a/arch/x86/kernel/head_64.S b/arch/x86/kernel/head_64.S index 3d1e6f1..239046b 100644 --- a/arch/x86/kernel/head_64.S +++ b/arch/x86/kernel/head_64.S @@ -234,9 +234,8 @@ ENTRY(secondary_startup_64) * init data section till per cpu areas are set up. */ movl $MSR_GS_BASE,%ecx - movq initial_gs(%rip),%rax - movq %rax,%rdx - shrq $32,%rdx + movl initial_gs(%rip),%eax + movl initial_gs+4(%rip),%edx wrmsr /* esi is pointer to real mode structure with interesting info. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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