Commit 77a1c447 authored Apr 13, 2017 by Pavankumar Kondeti Committed by Gerrit - the friendly Code Review server Jan 23, 2018

core_ctl: Take state_lock while preparing the global_state

global_state file output is prepared by reading the members of CPU
and cluster data structures. These members are updated under state_lock,
so acquire the same lock while preparing the output.

Change-Id: I92c4103a61102f98911b269f2a527707003f5cf6
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
Signed-off-by: Satya Durga Srinivasu Prabhala <satyap@codeaurora.org>

parent c1f5c2d9

kernel/sched/core_ctl.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -264,6 +264,7 @@ static ssize_t show_global_state(const struct cluster_data state, char buf)
		ssize_t count = 0;
		unsigned int cpu;

		spin_lock_irq(&state_lock);
		for_each_possible_cpu(cpu) {
		c = &per_cpu(cpu_state, cpu);
		cluster = c->cluster;
		@@ -299,6 +300,7 @@ static ssize_t show_global_state(const struct cluster_data state, char buf)
		count += snprintf(buf + count, PAGE_SIZE - count,
		"\tBoost: %u\n", (unsigned int) cluster->boost);
		}
		spin_unlock_irq(&state_lock);

		return count;
		}