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| author |   Eric Dumazet <dada1@cosmosbay.com> | 2007-11-09 22:39:38 +0100 |
|---|---|---|
| committer |   Ingo Molnar <mingo@elte.hu> | 2007-11-09 22:39:38 +0100 |
| commit | d6322faf296ab5bbb597f8b0abcb50153754cd08 (patch) | |
| tree | c11f52d5c4be2081d88c85b63cc95a15e81c4e3c | |
| parent | sched: reintroduce SMP tunings again (diff) | |
| download | linux-dev-d6322faf296ab5bbb597f8b0abcb50153754cd08.tar.xz linux-dev-d6322faf296ab5bbb597f8b0abcb50153754cd08.zip | |
sched: cleanup, use NSEC_PER_MSEC and NSEC_PER_SEC
1) hardcoded 1000000000 value is used five times in places where
NSEC_PER_SEC might be more readable.
2) A conversion from nsec to msec uses the hardcoded 1000000 value,
which is a candidate for NSEC_PER_MSEC.
no code changed:
text data bss dec hex filename
44359 3326 36 47721 ba69 sched.o.before
44359 3326 36 47721 ba69 sched.o.after
Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| -rw-r--r-- | kernel/sched.c | 8 | ||||
| -rw-r--r-- | kernel/sysctl.c | 4 |
2 files changed, 6 insertions, 6 deletions
diff --git a/kernel/sched.c b/kernel/sched.c index 69cae271c63b..387258cdd0b9 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -75,7 +75,7 @@ */ unsigned long long __attribute__((weak)) sched_clock(void) { - return (unsigned long long)jiffies * (1000000000 / HZ); + return (unsigned long long)jiffies * (NSEC_PER_SEC / HZ); } /* @@ -99,8 +99,8 @@ unsigned long long __attribute__((weak)) sched_clock(void) /* * Some helpers for converting nanosecond timing to jiffy resolution */ -#define NS_TO_JIFFIES(TIME) ((unsigned long)(TIME) / (1000000000 / HZ)) -#define JIFFIES_TO_NS(TIME) ((TIME) * (1000000000 / HZ)) +#define NS_TO_JIFFIES(TIME) ((unsigned long)(TIME) / (NSEC_PER_SEC / HZ)) +#define JIFFIES_TO_NS(TIME) ((TIME) * (NSEC_PER_SEC / HZ)) #define NICE_0_LOAD SCHED_LOAD_SCALE #define NICE_0_SHIFT SCHED_LOAD_SHIFT @@ -7256,7 +7256,7 @@ static u64 cpu_usage_read(struct cgroup *cgrp, struct cftype *cft) spin_unlock_irqrestore(&cpu_rq(i)->lock, flags); } /* Convert from ns to ms */ - do_div(res, 1000000); + do_div(res, NSEC_PER_MSEC); return res; } diff --git a/kernel/sysctl.c b/kernel/sysctl.c index 6e3b63c06856..adddf682d4cb 100644 --- a/kernel/sysctl.c +++ b/kernel/sysctl.c @@ -226,9 +226,9 @@ static struct ctl_table root_table[] = { #ifdef CONFIG_SCHED_DEBUG static unsigned long min_sched_granularity_ns = 100000; /* 100 usecs */ -static unsigned long max_sched_granularity_ns = 1000000000; /* 1 second */ +static unsigned long max_sched_granularity_ns = NSEC_PER_SEC; /* 1 second */ static unsigned long min_wakeup_granularity_ns; /* 0 usecs */ -static unsigned long max_wakeup_granularity_ns = 1000000000; /* 1 second */ +static unsigned long max_wakeup_granularity_ns = NSEC_PER_SEC; /* 1 second */ #endif static struct ctl_table kern_table[] = { |