diff options
| author | H. Peter Anvin <hpa@zytor.com> | 2009-12-01 05:33:51 (GMT) |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2009-12-01 05:33:51 (GMT) |
| commit | ccef086454d4c97e7b722e9303390207d681cb4c (patch) | |
| tree | 2dce23edf190368aab9afa7af6b4abec99930089 /arch/x86 | |
| parent | dd4377b02d9f028006beed1b7b1695ee5d1498b6 (diff) | |
| download | linux-ccef086454d4c97e7b722e9303390207d681cb4c.tar.xz | |
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>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/include/asm/e820.h | 6 | ||||
| -rw-r--r-- | arch/x86/kernel/apic/x2apic_uv_x.c | 2 |
2 files changed, 6 insertions, 2 deletions
diff --git a/arch/x86/include/asm/e820.h b/arch/x86/include/asm/e820.h index 68b4e0e..761249e 100644 --- a/arch/x86/include/asm/e820.h +++ b/arch/x86/include/asm/e820.h @@ -133,9 +133,13 @@ extern void e820_reserve_resources_late(void); extern void setup_memory_map(void); extern char *default_machine_specific_memory_setup(void); +/* + * Returns true iff the specified range [s,e) is completely contained inside + * the ISA region. + */ static inline bool is_ISA_range(u64 s, u64 e) { - return s >= ISA_START_ADDRESS && e < ISA_END_ADDRESS; + return s >= ISA_START_ADDRESS && e <= ISA_END_ADDRESS; } #endif /* __KERNEL__ */ diff --git a/arch/x86/kernel/apic/x2apic_uv_x.c b/arch/x86/kernel/apic/x2apic_uv_x.c index 597a47b..1e09417 100644 --- a/arch/x86/kernel/apic/x2apic_uv_x.c +++ b/arch/x86/kernel/apic/x2apic_uv_x.c @@ -39,7 +39,7 @@ static u64 gru_start_paddr, gru_end_paddr; static inline bool is_GRU_range(u64 start, u64 end) { - return start >= gru_start_paddr && end < gru_end_paddr; + return start >= gru_start_paddr && end <= gru_end_paddr; } static bool uv_is_untracked_pat_range(u64 start, u64 end) |