Messages in this thread Patch in this message | | | From | Andy Lutomirski <> | Subject | [PATCH 08/10] x86/entry: Only allocate space for SYSENTER_stack if needed | Date | Sun, 28 Feb 2016 21:28:53 -0800 |
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The SYSENTER stack is only used on 32-bit kernels. Remove it in 64-bit kernels.
(We may end up using it down the road on 64-bit kernels. If so, we'll re-enable it for CONFIG_IA32_EMULATION.)
Signed-off-by: Andy Lutomirski <luto@kernel.org> --- arch/x86/include/asm/processor.h | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h index ecb410310e70..7cd01b71b5bd 100644 --- a/arch/x86/include/asm/processor.h +++ b/arch/x86/include/asm/processor.h @@ -297,10 +297,12 @@ struct tss_struct { */ unsigned long io_bitmap[IO_BITMAP_LONGS + 1]; +#ifdef CONFIG_X86_32 /* * Space for the temporary SYSENTER stack: */ unsigned long SYSENTER_stack[64]; +#endif } ____cacheline_aligned; -- 2.5.0
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