diff options
Diffstat (limited to 'kernel/time/sched_clock.c')
| -rw-r--r-- | kernel/time/sched_clock.c | 19 |
1 files changed, 8 insertions, 11 deletions
diff --git a/kernel/time/sched_clock.c b/kernel/time/sched_clock.c index aad1ae6077ef..a326f27d7f09 100644 --- a/kernel/time/sched_clock.c +++ b/kernel/time/sched_clock.c @@ -49,10 +49,14 @@ static inline u64 notrace cyc_to_ns(u64 cyc, u32 mult, u32 shift) return (cyc * mult) >> shift; } -static unsigned long long notrace cyc_to_sched_clock(u32 cyc, u32 mask) +static unsigned long long notrace sched_clock_32(void) { u64 epoch_ns; u32 epoch_cyc; + u32 cyc; + + if (cd.suspended) + return cd.epoch_ns; /* * Load the epoch_cyc and epoch_ns atomically. We do this by @@ -68,7 +72,9 @@ static unsigned long long notrace cyc_to_sched_clock(u32 cyc, u32 mask) smp_rmb(); } while (epoch_cyc != cd.epoch_cyc_copy); - return epoch_ns + cyc_to_ns((cyc - epoch_cyc) & mask, cd.mult, cd.shift); + cyc = read_sched_clock(); + cyc = (cyc - epoch_cyc) & sched_clock_mask; + return epoch_ns + cyc_to_ns(cyc, cd.mult, cd.shift); } /* @@ -160,19 +166,10 @@ void __init setup_sched_clock(u32 (*read)(void), int bits, unsigned long rate) pr_debug("Registered %pF as sched_clock source\n", read); } -static unsigned long long notrace sched_clock_32(void) -{ - u32 cyc = read_sched_clock(); - return cyc_to_sched_clock(cyc, sched_clock_mask); -} - unsigned long long __read_mostly (*sched_clock_func)(void) = sched_clock_32; unsigned long long notrace sched_clock(void) { - if (cd.suspended) - return cd.epoch_ns; - return sched_clock_func(); } |