diff options
| -rw-r--r-- | arch/x86/include/asm/vgtod.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/x86/include/asm/vgtod.h b/arch/x86/include/asm/vgtod.h index d17b092b9f1b..69d05c6d47f5 100644 --- a/arch/x86/include/asm/vgtod.h +++ b/arch/x86/include/asm/vgtod.h @@ -13,6 +13,15 @@ typedef u64 gtod_long_t; typedef unsigned long gtod_long_t; #endif +/* + * There is one of these objects in the vvar page for each + * vDSO-accelerated clockid. For high-resolution clocks, this encodes + * the time corresponding to vsyscall_gtod_data.cycle_last. For coarse + * clocks, this encodes the actual time. + * + * To confuse the reader, for high-resolution clocks, nsec is left-shifted + * by vsyscall_gtod_data.shift. + */ struct vgtod_ts { u64 sec; u64 nsec; |