2 files changed, 8 insertions, 106 deletions

diff --git a/arch/i386/kernel/apic.c b/arch/i386/kernel/apic.c
index d8f94e78de8a..2d8c6ce1ecda 100644
--- a/arch/i386/kernel/apic.c
+++ b/arch/i386/kernel/apic.c
@@ -92,10 +92,6 @@ void __init apic_intr_init(void)
 /* Using APIC to generate smp_local_timer_interrupt? */
 int using_apic_timer = 0;
 
-static DEFINE_PER_CPU(int, prof_multiplier) = 1;
-static DEFINE_PER_CPU(int, prof_old_multiplier) = 1;
-static DEFINE_PER_CPU(int, prof_counter) = 1;
-
 static int enabled_via_apicbase;
 
 void enable_NMI_through_LVT0 (void * dummy)
@@ -1092,34 +1088,6 @@ void enable_APIC_timer(void)
         }
 }
 
-/*
- * the frequency of the profiling timer can be changed
- * by writing a multiplier value into /proc/profile.
- */
-int setup_profiling_timer(unsigned int multiplier)
-{
-        int i;
-
-        /*
-         * Sanity check. [at least 500 APIC cycles should be
-         * between APIC interrupts as a rule of thumb, to avoid
-         * irqs flooding us]
-         */
-        if ( (!multiplier) || (calibration_result/multiplier < 500))
-                return -EINVAL;
-
-        /* 
-         * Set the new multiplier for each CPU. CPUs don't start using the
-         * new values until the next timer interrupt in which they do process
-         * accounting. At that time they also adjust their APIC timers
-         * accordingly.
-         */
-        for (i = 0; i < NR_CPUS; ++i)
-                per_cpu(prof_multiplier, i) = multiplier;
-
-        return 0;
-}
-
 #undef APIC_DIVISOR
 
 /*
@@ -1134,32 +1102,10 @@ int setup_profiling_timer(unsigned int multiplier)
 
 inline void smp_local_timer_interrupt(struct pt_regs * regs)
 {
-        int cpu = smp_processor_id();
-
         profile_tick(CPU_PROFILING, regs);
-        if (--per_cpu(prof_counter, cpu) <= 0) {
-                /*
-                 * The multiplier may have changed since the last time we got
-                 * to this point as a result of the user writing to
-                 * /proc/profile. In this case we need to adjust the APIC
-                 * timer accordingly.
-                 *
-                 * Interrupts are already masked off at this point.
-                 */
-                per_cpu(prof_counter, cpu) = per_cpu(prof_multiplier, cpu);
-                if (per_cpu(prof_counter, cpu) !=
-                                        per_cpu(prof_old_multiplier, cpu)) {
-                        __setup_APIC_LVTT(
-                                        calibration_result/
-                                        per_cpu(prof_counter, cpu));
-                        per_cpu(prof_old_multiplier, cpu) =
-                                                per_cpu(prof_counter, cpu);
-                }
-
 #ifdef CONFIG_SMP
-                update_process_times(user_mode_vm(regs));
+        update_process_times(user_mode_vm(regs));
 #endif
-        }
 
         /*
          * We take the 'long' return path, and there every subsystem
@@ -1206,6 +1152,11 @@ fastcall void smp_apic_timer_interrupt(struct pt_regs *regs)
         irq_exit();
 }
 
+int setup_profiling_timer(unsigned int multiplier)
+{
+        return -EINVAL;
+}
+
 /*
  * This interrupt should _never_ happen with our APIC/SMP architecture
  */
diff --git a/arch/x86_64/kernel/apic.c b/arch/x86_64/kernel/apic.c
index 18691ce4c759..fa47ae731576 100644
--- a/arch/x86_64/kernel/apic.c
+++ b/arch/x86_64/kernel/apic.c
@@ -41,10 +41,6 @@ int disable_apic_timer __initdata;
 /* Using APIC to generate smp_local_timer_interrupt? */
 int using_apic_timer = 0;
 
-static DEFINE_PER_CPU(int, prof_multiplier) = 1;
-static DEFINE_PER_CPU(int, prof_old_multiplier) = 1;
-static DEFINE_PER_CPU(int, prof_counter) = 1;
-
 static void apic_pm_activate(void);
 
 void enable_NMI_through_LVT0 (void * dummy)
@@ -805,32 +801,9 @@ void enable_APIC_timer(void)
         }
 }
 
-/*
- * the frequency of the profiling timer can be changed
- * by writing a multiplier value into /proc/profile.
- */
 int setup_profiling_timer(unsigned int multiplier)
 {
-        int i;
-
-        /*
-         * Sanity check. [at least 500 APIC cycles should be
-         * between APIC interrupts as a rule of thumb, to avoid
-         * irqs flooding us]
-         */
-        if ( (!multiplier) || (calibration_result/multiplier < 500))
-                return -EINVAL;
-
-        /* 
-         * Set the new multiplier for each CPU. CPUs don't start using the
-         * new values until the next timer interrupt in which they do process
-         * accounting. At that time they also adjust their APIC timers
-         * accordingly.
-         */
-        for (i = 0; i < NR_CPUS; ++i)
-                per_cpu(prof_multiplier, i) = multiplier;
-
-        return 0;
+        return -EINVAL;
 }
 
 #ifdef CONFIG_X86_MCE_AMD
@@ -857,32 +830,10 @@ void setup_threshold_lvt(unsigned long lvt_off)
 
 void smp_local_timer_interrupt(struct pt_regs *regs)
 {
-        int cpu = smp_processor_id();
-
         profile_tick(CPU_PROFILING, regs);
-        if (--per_cpu(prof_counter, cpu) <= 0) {
-                /*
-                 * The multiplier may have changed since the last time we got
-                 * to this point as a result of the user writing to
-                 * /proc/profile. In this case we need to adjust the APIC
-                 * timer accordingly.
-                 *
-                 * Interrupts are already masked off at this point.
-                 */
-                per_cpu(prof_counter, cpu) = per_cpu(prof_multiplier, cpu);
-                if (per_cpu(prof_counter, cpu) != 
-                    per_cpu(prof_old_multiplier, cpu)) {
-                        __setup_APIC_LVTT(calibration_result/
-                                        per_cpu(prof_counter, cpu));
-                        per_cpu(prof_old_multiplier, cpu) =
-                                per_cpu(prof_counter, cpu);
-                }
-
 #ifdef CONFIG_SMP
-                update_process_times(user_mode(regs));
+        update_process_times(user_mode(regs));
 #endif
-        }
-
         /*
          * We take the 'long' return path, and there every subsystem
          * grabs the appropriate locks (kernel lock/ irq lock).