summaryrefslogtreecommitdiffstats
path: root/tools/power/cpupower/utils/helpers/sysfs.c
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2012-05-22 18:27:32 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-05-22 18:27:32 -0700
commitd79ee93de909dfb252279b9a95978bbda9a814a9 (patch)
treebfccca60fd36259ff4bcc5e78a2c272fbd680065 /tools/power/cpupower/utils/helpers/sysfs.c
parent2ff2b289a695807e291e1ed9f639d8a3ba5f4254 (diff)
parent1c2927f18576d65631d8e0ddd19e1d023183222e (diff)
Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler changes from Ingo Molnar: "The biggest change is the cleanup/simplification of the load-balancer: instead of the current practice of architectures twiddling scheduler internal data structures and providing the scheduler domains in colorfully inconsistent ways, we now have generic scheduler code in kernel/sched/core.c:sched_init_numa() that looks at the architecture's node_distance() parameters and (while not fully trusting it) deducts a NUMA topology from it. This inevitably changes balancing behavior - hopefully for the better. There are various smaller optimizations, cleanups and fixlets as well" * 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: sched: Taint kernel with TAINT_WARN after sleep-in-atomic bug sched: Remove stale power aware scheduling remnants and dysfunctional knobs sched/debug: Fix printing large integers on 32-bit platforms sched/fair: Improve the ->group_imb logic sched/nohz: Fix rq->cpu_load[] calculations sched/numa: Don't scale the imbalance sched/fair: Revert sched-domain iteration breakage sched/x86: Rewrite set_cpu_sibling_map() sched/numa: Fix the new NUMA topology bits sched/numa: Rewrite the CONFIG_NUMA sched domain support sched/fair: Propagate 'struct lb_env' usage into find_busiest_group sched/fair: Add some serialization to the sched_domain load-balance walk sched/fair: Let minimally loaded cpu balance the group sched: Change rq->nr_running to unsigned int x86/numa: Check for nonsensical topologies on real hw as well x86/numa: Hard partition cpu topology masks on node boundaries x86/numa: Allow specifying node_distance() for numa=fake x86/sched: Make mwait_usable() heed to "idle=" kernel parameters properly sched: Update documentation and comments sched_rt: Avoid unnecessary dequeue and enqueue of pushable tasks in set_cpus_allowed_rt()
Diffstat (limited to 'tools/power/cpupower/utils/helpers/sysfs.c')
-rw-r--r--tools/power/cpupower/utils/helpers/sysfs.c35
1 files changed, 2 insertions, 33 deletions
diff --git a/tools/power/cpupower/utils/helpers/sysfs.c b/tools/power/cpupower/utils/helpers/sysfs.c
index c6343024a61..96e28c124b5 100644
--- a/tools/power/cpupower/utils/helpers/sysfs.c
+++ b/tools/power/cpupower/utils/helpers/sysfs.c
@@ -362,22 +362,7 @@ char *sysfs_get_cpuidle_driver(void)
*/
int sysfs_get_sched(const char *smt_mc)
{
- unsigned long value;
- char linebuf[MAX_LINE_LEN];
- char *endp;
- char path[SYSFS_PATH_MAX];
-
- if (strcmp("mc", smt_mc) && strcmp("smt", smt_mc))
- return -EINVAL;
-
- snprintf(path, sizeof(path),
- PATH_TO_CPU "sched_%s_power_savings", smt_mc);
- if (sysfs_read_file(path, linebuf, MAX_LINE_LEN) == 0)
- return -1;
- value = strtoul(linebuf, &endp, 0);
- if (endp == linebuf || errno == ERANGE)
- return -1;
- return value;
+ return -ENODEV;
}
/*
@@ -388,21 +373,5 @@ int sysfs_get_sched(const char *smt_mc)
*/
int sysfs_set_sched(const char *smt_mc, int val)
{
- char linebuf[MAX_LINE_LEN];
- char path[SYSFS_PATH_MAX];
- struct stat statbuf;
-
- if (strcmp("mc", smt_mc) && strcmp("smt", smt_mc))
- return -EINVAL;
-
- snprintf(path, sizeof(path),
- PATH_TO_CPU "sched_%s_power_savings", smt_mc);
- sprintf(linebuf, "%d", val);
-
- if (stat(path, &statbuf) != 0)
- return -ENODEV;
-
- if (sysfs_write_file(path, linebuf, MAX_LINE_LEN) == 0)
- return -1;
- return 0;
+ return -ENODEV;
}