diff options
Diffstat (limited to 'arch/powerpc/platforms/pseries/lparcfg.c')
| -rw-r--r-- | arch/powerpc/platforms/pseries/lparcfg.c | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/arch/powerpc/platforms/pseries/lparcfg.c b/arch/powerpc/platforms/pseries/lparcfg.c index c508c938dc71e..7c872dc01bdb0 100644 --- a/arch/powerpc/platforms/pseries/lparcfg.c +++ b/arch/powerpc/platforms/pseries/lparcfg.c @@ -52,18 +52,20 @@ * Track sum of all purrs across all processors. This is used to further * calculate usage values by different applications */ +static void cpu_get_purr(void *arg) +{ + atomic64_t *sum = arg; + + atomic64_add(mfspr(SPRN_PURR), sum); +} + static unsigned long get_purr(void) { - unsigned long sum_purr = 0; - int cpu; + atomic64_t purr = ATOMIC64_INIT(0); - for_each_possible_cpu(cpu) { - struct cpu_usage *cu; + on_each_cpu(cpu_get_purr, &purr, 1); - cu = &per_cpu(cpu_usage_array, cpu); - sum_purr += cu->current_tb; - } - return sum_purr; + return atomic64_read(&purr); } /* |