diff options
| author | Paul Menage <menage@google.com> | 2008-04-29 01:00:06 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-29 08:06:09 -0700 |
| commit | 06ecb27cfbf53ac2c7e397aa1619a6f9a98c5896 (patch) | |
| tree | 1633e77714da0d6478b79bd74d95c7fc715db15c /kernel/sched.c | |
| parent | e73d2c61d1fcbd3621688ae457b49509c8d4c601 (diff) | |
| download | linux-stable-06ecb27cfbf53ac2c7e397aa1619a6f9a98c5896.tar.gz linux-stable-06ecb27cfbf53ac2c7e397aa1619a6f9a98c5896.tar.bz2 linux-stable-06ecb27cfbf53ac2c7e397aa1619a6f9a98c5896.zip | |
CGroups _s64 files: use read_s64/write_s64 in CFS cgroup for rt_runtime file
This removes some filesystem boilerplate from the CFS cgroup subsystem.
Signed-off-by: Paul Menage <menage@google.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/sched.c')
| -rw-r--r-- | kernel/sched.c | 46 |
1 files changed, 6 insertions, 40 deletions
diff --git a/kernel/sched.c b/kernel/sched.c index 2528fbd974b4..e2f7f5acc807 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -9073,48 +9073,14 @@ static u64 cpu_shares_read_u64(struct cgroup *cgrp, struct cftype *cft) #ifdef CONFIG_RT_GROUP_SCHED static ssize_t cpu_rt_runtime_write(struct cgroup *cgrp, struct cftype *cft, - struct file *file, - const char __user *userbuf, - size_t nbytes, loff_t *unused_ppos) + s64 val) { - char buffer[64]; - int retval = 0; - s64 val; - char *end; - - if (!nbytes) - return -EINVAL; - if (nbytes >= sizeof(buffer)) - return -E2BIG; - if (copy_from_user(buffer, userbuf, nbytes)) - return -EFAULT; - - buffer[nbytes] = 0; /* nul-terminate */ - - /* strip newline if necessary */ - if (nbytes && (buffer[nbytes-1] == '\n')) - buffer[nbytes-1] = 0; - val = simple_strtoll(buffer, &end, 0); - if (*end) - return -EINVAL; - - /* Pass to subsystem */ - retval = sched_group_set_rt_runtime(cgroup_tg(cgrp), val); - if (!retval) - retval = nbytes; - return retval; + return sched_group_set_rt_runtime(cgroup_tg(cgrp), val); } -static ssize_t cpu_rt_runtime_read(struct cgroup *cgrp, struct cftype *cft, - struct file *file, - char __user *buf, size_t nbytes, - loff_t *ppos) +static s64 cpu_rt_runtime_read(struct cgroup *cgrp, struct cftype *cft) { - char tmp[64]; - long val = sched_group_rt_runtime(cgroup_tg(cgrp)); - int len = sprintf(tmp, "%ld\n", val); - - return simple_read_from_buffer(buf, nbytes, ppos, tmp, len); + return sched_group_rt_runtime(cgroup_tg(cgrp)); } static int cpu_rt_period_write_uint(struct cgroup *cgrp, struct cftype *cftype, @@ -9140,8 +9106,8 @@ static struct cftype cpu_files[] = { #ifdef CONFIG_RT_GROUP_SCHED { .name = "rt_runtime_us", - .read = cpu_rt_runtime_read, - .write = cpu_rt_runtime_write, + .read_s64 = cpu_rt_runtime_read, + .write_s64 = cpu_rt_runtime_write, }, { .name = "rt_period_us", |