• Toshi Kani's avatar
    x86/mtrr: Fix PAT init handling when MTRR is disabled · ad025a73
    Toshi Kani authored
    get_mtrr_state() calls pat_init() on BSP even if MTRR is disabled.
    This results in calling pat_init() on BSP only since APs do not call
    pat_init() when MTRR is disabled.  This inconsistency between BSP
    and APs leads to undefined behavior.
    
    Make BSP's calling condition to pat_init() consistent with AP's,
    mtrr_ap_init() and mtrr_aps_init().
    Signed-off-by: default avatarToshi Kani <toshi.kani@hpe.com>
    Reviewed-by: default avatarThomas Gleixner <tglx@linutronix.de>
    Cc: Andrew Morton <akpm@linux-foundation.org>
    Cc: Andy Lutomirski <luto@amacapital.net>
    Cc: Borislav Petkov <bp@alien8.de>
    Cc: Borislav Petkov <bp@suse.de>
    Cc: Brian Gerst <brgerst@gmail.com>
    Cc: Denys Vlasenko <dvlasenk@redhat.com>
    Cc: H. Peter Anvin <hpa@zytor.com>
    Cc: Juergen Gross <jgross@suse.com>
    Cc: Linus Torvalds <torvalds@linux-foundation.org>
    Cc: Luis R. Rodriguez <mcgrof@suse.com>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Toshi Kani <toshi.kani@hp.com>
    Cc: elliott@hpe.com
    Cc: konrad.wilk@oracle.com
    Cc: paul.gortmaker@windriver.com
    Cc: xen-devel@lists.xenproject.org
    Link: http://lkml.kernel.org/r/1458769323-24491-6-git-send-email-toshi.kani@hpe.comSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
    ad025a73
main.c 22.9 KB