timers/x86/hpet: Use HPET_COUNTER to specify the hpet counter in vread_hpet()

vread_hpet() uses "0xf0" as the offset of the hpet counter. To
clarify the meaning of this code, it should use symbolic name,
HPET_COUNTER, instead.

Signed-off-by: Satoru Takeuchi <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: "H. Peter Anvin" <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>

diff --git a/arch/x86/vdso/vclock_gettime.c b/arch/x86/vdso/vclock_gettime.c
index 205ad328aa52810975dd332771a16911f5e6935b..c74436e687bf8984b722efa1a657e1a6a8b47f3b 100644 (file)
--- a/arch/x86/vdso/vclock_gettime.c
+++ b/arch/x86/vdso/vclock_gettime.c
@@ -60,7 +60,7 @@ notrace static cycle_t vread_tsc(void)
 
 static notrace cycle_t vread_hpet(void)
 {
-       return readl((const void __iomem *)fix_to_virt(VSYSCALL_HPET) + 0xf0);
+       return readl((const void __iomem *)fix_to_virt(VSYSCALL_HPET) + HPET_COUNTER);
 }
 
 #ifdef CONFIG_PARAVIRT_CLOCK