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authorJisheng Zhang <jszhang@marvell.com>2016-06-27 10:07:18 (GMT)
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2016-06-27 22:04:04 (GMT)
commit4a7cb7a96aa32e34777b263fbf372543fb85ddea (patch)
treee6aa6dd0bf9a2fdd11edc8286c2963c6aa8753ab
parent29327c84baebec3549b9775dc8de3d26343720cb (diff)
downloadlinux-4a7cb7a96aa32e34777b263fbf372543fb85ddea.tar.xz
intel_pstate: Declare pid_params/pstate_funcs/hwp_active __read_mostly
pid_params is written once by copy_pid_params() during initialization, and thereafter is mostly read by hot path intel_pstate_update_util(). The read of pid_params gets more after commit a4675fbc4a7a ("cpufreq: intel_pstate: Replace timers with utilization update callbacks") pstate_funcs is written once by copy_cpu_funcs() during initialization, and thereafter is mostly read by hot path intel_pstate_update_util() hwp_active is written to once during initialization and thereafter is mostly read by hot path intel_pstate_update_util(). The fact that they are mostly read and not written to makes them candidates for __read_mostly declarations. Signed-off-by: Jisheng Zhang <jszhang@marvell.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
-rw-r--r--drivers/cpufreq/intel_pstate.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c
index fc71f92..2ed7955 100644
--- a/drivers/cpufreq/intel_pstate.c
+++ b/drivers/cpufreq/intel_pstate.c
@@ -282,9 +282,9 @@ struct cpu_defaults {
static inline int32_t get_target_pstate_use_performance(struct cpudata *cpu);
static inline int32_t get_target_pstate_use_cpu_load(struct cpudata *cpu);
-static struct pstate_adjust_policy pid_params;
-static struct pstate_funcs pstate_funcs;
-static int hwp_active;
+static struct pstate_adjust_policy pid_params __read_mostly;
+static struct pstate_funcs pstate_funcs __read_mostly;
+static int hwp_active __read_mostly;
#ifdef CONFIG_ACPI
static bool acpi_ppc;