linux-kernel - [RFC][PATCH 0/8] x86/mm: page fault handling cleanups

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Message-Id: <20180907194852.3C351B82@viggo.jf.intel.com>
Date:   Fri, 07 Sep 2018 12:48:52 -0700
From:   Dave Hansen <dave.hansen@...ux.intel.com>
To:     linux-kernel@...r.kernel.org
Cc:     Dave Hansen <dave.hansen@...ux.intel.com>,
        sean.j.christopherson@...el.com, peterz@...radead.org,
        tglx@...utronix.de, luto@...nel.org, x86@...nel.org
Subject: [RFC][PATCH 0/8] x86/mm: page fault handling cleanups

I went trying to clean up the spurious protection key checks.
But, I got distracted by some other warts in the code.  I hope this
makes things more comprehendable with some improved structure,
commenting and naming.

We come out the other side of it with a new warning in for pkey
faults in the kernel portion of the address space, and removal
of some dead pkeys code, but no other functional changes.

There is a potential impact from moving the vsyscall emulation.
But, this does pass the x86 selftests without any fuss.

Cc: Sean Christopherson <sean.j.christopherson@...el.com>
Cc: "Peter Zijlstra (Intel)" <peterz@...radead.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Andy Lutomirski <luto@...nel.org>
Cc: x86@...nel.org