[tip:x86/pti] x86/pti: Document fix wrong index

[tip-bot for zhenwei.pi]

Commit-ID:  98f0fceec7f84d80bc053e49e596088573086421
Gitweb:     https://git.kernel.org/tip/98f0fceec7f84d80bc053e49e596088573086421
Author:     zhenwei.pi <zhenwei.pi@xxxxxxxxxxxxxxx>
AuthorDate: Thu, 18 Jan 2018 09:04:52 +0800
Committer:  Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitDate: Fri, 19 Jan 2018 16:31:29 +0100

x86/pti: Document fix wrong index

In section <2. Runtime Cost>, fix wrong index.

Signed-off-by: zhenwei.pi <zhenwei.pi@xxxxxxxxxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: dave.hansen@xxxxxxxxxxxxxxx
Link: https://lkml.kernel.org/r/1516237492-27739-1-git-send-email-zhenwei.pi@xxxxxxxxxxxxxxx

---
 Documentation/x86/pti.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Documentation/x86/pti.txt b/Documentation/x86/pti.txt
index d11eff6..5cd5843 100644
--- a/Documentation/x86/pti.txt
+++ b/Documentation/x86/pti.txt
@@ -78,7 +78,7 @@ this protection comes at a cost:
      non-PTI SYSCALL entry code, so requires mapping fewer
      things into the userspace page tables.  The downside is
      that stacks must be switched at entry time.
-  d. Global pages are disabled for all kernel structures not
+  c. Global pages are disabled for all kernel structures not
      mapped into both kernel and userspace page tables.  This
      feature of the MMU allows different processes to share TLB
      entries mapping the kernel.  Losing the feature means more