x86/pti: Document fix wrong index
In section <2. Runtime Cost>, fix wrong index. Signed-off-by: zhenwei.pi <zhenwei.pi@youruncloud.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: dave.hansen@linux.intel.com Link: https://lkml.kernel.org/r/1516237492-27739-1-git-send-email-zhenwei.pi@youruncloud.com
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@ -78,7 +78,7 @@ this protection comes at a cost:
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non-PTI SYSCALL entry code, so requires mapping fewer
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things into the userspace page tables. The downside is
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that stacks must be switched at entry time.
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d. Global pages are disabled for all kernel structures not
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c. Global pages are disabled for all kernel structures not
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mapped into both kernel and userspace page tables. This
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feature of the MMU allows different processes to share TLB
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entries mapping the kernel. Losing the feature means more
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