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    SubjectRe: [PATCH v2 5/6] x86/xen,pat: Remove PAT table init code from Xen
    On Wed, Mar 16, 2016 at 06:46:58PM -0600, Toshi Kani wrote:
    > Xen supports PAT without MTRR for its guests. In order to
    > enable WC attribute, it was necessary for xen_start_kernel()
    > to call pat_init_cache_modes() to update PAT table before
    > starting guest kernel.
    >
    > Now that the kernel initializes PAT table to the BIOS handoff
    > state when MTRR is disabled, this Xen-specific PAT init code
    > is no longer necessary. Delete it from xen_start_kernel().
    >
    > Also change pat_init_cache_modes() to a static function since
    > PAT table should not be tweaked by other modules.
    >
    > Signed-off-by: Toshi Kani <toshi.kani@hpe.com>
    > Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
    > Cc: Borislav Petkov <bp@suse.de>
    > Cc: Luis R. Rodriguez <mcgrof@suse.com>
    > Cc: Juergen Gross <jgross@suse.com>
    > Cc: Ingo Molnar <mingo@kernel.org>
    > Cc: H. Peter Anvin <hpa@zytor.com>
    > Cc: Thomas Gleixner <tglx@linutronix.de>
    > ---
    > arch/x86/include/asm/pat.h | 1 -
    > arch/x86/mm/pat.c | 2 +-
    > arch/x86/xen/enlighten.c | 9 ---------
    > 3 files changed, 1 insertion(+), 11 deletions(-)

    Jürgen, ack?

    --
    Regards/Gruss,
    Boris.

    SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg)
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