Commit-ID: 1256276c98dbcfb009ac8e0687df9a1e291fd149 Gitweb: http://git.kernel.org/tip/1256276c98dbcfb009ac8e0687df9a1e291fd149 Author: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx> AuthorDate: Mon, 25 Feb 2013 15:54:10 -0500 Committer: H. Peter Anvin <hpa@xxxxxxxxxxxxxxx> CommitDate: Mon, 25 Feb 2013 13:42:37 -0800 x86, doc: Fix incorrect comment about 64-bit code segment descriptors The AMD64 Architecture Programmer's Manual Volume 2, on page 89 mentions: "If the processor is running in 64-bit mode (L=1), the only valid setting of the D bit is 0." This matches with what the code does. Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx> Link: http://lkml.kernel.org/r/1361825650-14031-4-git-send-email-konrad.wilk@xxxxxxxxxx Signed-off-by: H. Peter Anvin <hpa@xxxxxxxxxxxxxxx> --- arch/x86/kernel/head_64.S | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/x86/kernel/head_64.S b/arch/x86/kernel/head_64.S index 980053c..37f5304 100644 --- a/arch/x86/kernel/head_64.S +++ b/arch/x86/kernel/head_64.S @@ -49,7 +49,7 @@ L3_START_KERNEL = pud_index(__START_KERNEL_map) startup_64: /* - * At this point the CPU runs in 64bit mode CS.L = 1 CS.D = 1, + * At this point the CPU runs in 64bit mode CS.L = 1 CS.D = 0, * and someone has loaded an identity mapped page table * for us. These identity mapped page tables map all of the * kernel pages and possibly all of memory. @@ -146,7 +146,7 @@ ident_complete: jmp secondary_startup_64 ENTRY(secondary_startup_64) /* - * At this point the CPU runs in 64bit mode CS.L = 1 CS.D = 1, + * At this point the CPU runs in 64bit mode CS.L = 1 CS.D = 0, * and someone has loaded a mapped page table. * * %esi holds a physical pointer to real_mode_data. -- 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
|