[MIPS] Move FPU affinity code into separate file.

Gets rid of some of the CONFIG_MIPS_MT_FPAFF #ifdefery.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 0 insertions, 169 deletions

diff --git a/arch/mips/kernel/mips-mt.c b/arch/mips/kernel/mips-mt.c
index b1b994dd41db..1a7d89231299 100644
--- a/arch/mips/kernel/mips-mt.c
+++ b/arch/mips/kernel/mips-mt.c
@@ -6,7 +6,6 @@
 #include <linux/device.h>
 #include <linux/kernel.h>
 #include <linux/sched.h>
-#include <linux/cpumask.h>
 #include <linux/module.h>
 #include <linux/interrupt.h>
 #include <linux/security.h>
@@ -23,149 +22,6 @@
 #include <asm/cacheflush.h>
 
 /*
- * CPU mask used to set process affinity for MT VPEs/TCs with FPUs
- */
-
-cpumask_t mt_fpu_cpumask;
-
-#ifdef CONFIG_MIPS_MT_FPAFF
-
-#include <linux/cpu.h>
-#include <linux/delay.h>
-#include <asm/uaccess.h>
-
-unsigned long mt_fpemul_threshold = 0;
-
-/*
- * Replacement functions for the sys_sched_setaffinity() and
- * sys_sched_getaffinity() system calls, so that we can integrate
- * FPU affinity with the user's requested processor affinity.
- * This code is 98% identical with the sys_sched_setaffinity()
- * and sys_sched_getaffinity() system calls, and should be
- * updated when kernel/sched.c changes.
- */
-
-/*
- * find_process_by_pid - find a process with a matching PID value.
- * used in sys_sched_set/getaffinity() in kernel/sched.c, so
- * cloned here.
- */
-static inline struct task_struct *find_process_by_pid(pid_t pid)
-{
-	return pid ? find_task_by_pid(pid) : current;
-}
-
-
-/*
- * mipsmt_sys_sched_setaffinity - set the cpu affinity of a process
- */
-asmlinkage long mipsmt_sys_sched_setaffinity(pid_t pid, unsigned int len,
-				      unsigned long __user *user_mask_ptr)
-{
-	cpumask_t new_mask;
-	cpumask_t effective_mask;
-	int retval;
-	struct task_struct *p;
-
-	if (len < sizeof(new_mask))
-		return -EINVAL;
-
-	if (copy_from_user(&new_mask, user_mask_ptr, sizeof(new_mask)))
-		return -EFAULT;
-
-	lock_cpu_hotplug();
-	read_lock(&tasklist_lock);
-
-	p = find_process_by_pid(pid);
-	if (!p) {
-		read_unlock(&tasklist_lock);
-		unlock_cpu_hotplug();
-		return -ESRCH;
-	}
-
-	/*
-	 * It is not safe to call set_cpus_allowed with the
-	 * tasklist_lock held.  We will bump the task_struct's
-	 * usage count and drop tasklist_lock before invoking
-	 * set_cpus_allowed.
-	 */
-	get_task_struct(p);
-
-	retval = -EPERM;
-	if ((current->euid != p->euid) && (current->euid != p->uid) &&
-			!capable(CAP_SYS_NICE)) {
-		read_unlock(&tasklist_lock);
-		goto out_unlock;
-	}
-
-	retval = security_task_setscheduler(p, 0, NULL);
-	if (retval)
-		goto out_unlock;
-
-	/* Record new user-specified CPU set for future reference */
-	p->thread.user_cpus_allowed = new_mask;
-
-	/* Unlock the task list */
-	read_unlock(&tasklist_lock);
-
-	/* Compute new global allowed CPU set if necessary */
-	if ((p->thread.mflags & MF_FPUBOUND)
-	&& cpus_intersects(new_mask, mt_fpu_cpumask)) {
-		cpus_and(effective_mask, new_mask, mt_fpu_cpumask);
-		retval = set_cpus_allowed(p, effective_mask);
-	} else {
-		p->thread.mflags &= ~MF_FPUBOUND;
-		retval = set_cpus_allowed(p, new_mask);
-	}
-
-
-out_unlock:
-	put_task_struct(p);
-	unlock_cpu_hotplug();
-	return retval;
-}
-
-/*
- * mipsmt_sys_sched_getaffinity - get the cpu affinity of a process
- */
-asmlinkage long mipsmt_sys_sched_getaffinity(pid_t pid, unsigned int len,
-				      unsigned long __user *user_mask_ptr)
-{
-	unsigned int real_len;
-	cpumask_t mask;
-	int retval;
-	struct task_struct *p;
-
-	real_len = sizeof(mask);
-	if (len < real_len)
-		return -EINVAL;
-
-	lock_cpu_hotplug();
-	read_lock(&tasklist_lock);
-
-	retval = -ESRCH;
-	p = find_process_by_pid(pid);
-	if (!p)
-		goto out_unlock;
-	retval = security_task_getscheduler(p);
-	if (retval)
-		goto out_unlock;
-
-	cpus_and(mask, p->thread.user_cpus_allowed, cpu_possible_map);
-
-out_unlock:
-	read_unlock(&tasklist_lock);
-	unlock_cpu_hotplug();
-	if (retval)
-		return retval;
-	if (copy_to_user(user_mask_ptr, &mask, real_len))
-		return -EFAULT;
-	return real_len;
-}
-
-#endif /* CONFIG_MIPS_MT_FPAFF */
-
-/*
  * Dump new MIPS MT state for the core. Does not leave TCs halted.
  * Takes an argument which taken to be a pre-call MVPControl value.
  */
@@ -314,17 +170,6 @@ static int __init ndflush(char *s)
 	return 1;
 }
 __setup("ndflush=", ndflush);
-#ifdef CONFIG_MIPS_MT_FPAFF
-static int fpaff_threshold = -1;
-
-static int __init fpaff_thresh(char *str)
-{
-	get_option(&str, &fpaff_threshold);
-	return 1;
-}
-
-__setup("fpaff=", fpaff_thresh);
-#endif /* CONFIG_MIPS_MT_FPAFF */
 
 static unsigned int itc_base = 0;
 
@@ -380,20 +225,6 @@ void mips_mt_set_cpuoptions(void)
 	if (mt_n_dflushes != 1)
 		printk("D-Cache Flushes Repeated %d times\n", mt_n_dflushes);
 
-#ifdef CONFIG_MIPS_MT_FPAFF
-	/* FPU Use Factor empirically derived from experiments on 34K */
-#define FPUSEFACTOR 333
-
-	if (fpaff_threshold >= 0) {
-		mt_fpemul_threshold = fpaff_threshold;
-	} else {
-		mt_fpemul_threshold =
-			(FPUSEFACTOR * (loops_per_jiffy / (500000 / HZ))) / HZ;
-	}
-	printk("FPU Affinity set after %ld emulations\n",
-			mt_fpemul_threshold);
-#endif /* CONFIG_MIPS_MT_FPAFF */
-
 	if (itc_base != 0) {
 		/*
 		 * Configure ITC mapping.  This code is very