x86, mm: Correct the implementation of is_untracked_pat_range()
authorH. Peter Anvin <hpa@zytor.com>
Tue, 1 Dec 2009 05:33:51 +0000 (21:33 -0800)
committerH. Peter Anvin <hpa@zytor.com>
Tue, 1 Dec 2009 05:33:51 +0000 (21:33 -0800)
commitccef086454d4c97e7b722e9303390207d681cb4c
tree2dce23edf190368aab9afa7af6b4abec99930089
parentdd4377b02d9f028006beed1b7b1695ee5d1498b6
x86, mm: Correct the implementation of is_untracked_pat_range()

The semantics the PAT code expect of is_untracked_pat_range() is "is
this range completely contained inside the untracked region."  This
means that checkin 8a27138924f64d2f30c1022f909f74480046bc3f was
technically wrong, because the implementation needlessly confusing.

The sane interface is for it to take a semiclosed range like just
about everything else (as evidenced by the sheer number of "- 1"'s
removed by that patch) so change the actual implementation to match.

Reported-by: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Jack Steiner <steiner@sgi.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
LKML-Reference: <20091119202341.GA4420@sgi.com>
arch/x86/include/asm/e820.h
arch/x86/kernel/apic/x2apic_uv_x.c