Merge master.kernel.org:/pub/scm/linux/kernel/git/kyle/parisc-2.6

[linux-2.6-omap-h63xx.git] / arch / arm / kernel / process.c

diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
index 1ff75cee4b0dd0d3cf60efedada3f37805775bca..e1c77ee885a7f98eaaa9ac213991874561d2b34d 100644 (file)
--- a/arch/arm/kernel/process.c
+++ b/arch/arm/kernel/process.c
@@ -28,10 +28,12 @@
 #include <linux/init.h>
 #include <linux/cpu.h>
 #include <linux/elfcore.h>
+#include <linux/pm.h>
 
 #include <asm/leds.h>
 #include <asm/processor.h>
 #include <asm/system.h>
+#include <asm/thread_notify.h>
 #include <asm/uaccess.h>
 #include <asm/mach/time.h>
 
@@ -71,8 +73,36 @@ static int __init hlt_setup(char *__unused)
 __setup("nohlt", nohlt_setup);
 __setup("hlt", hlt_setup);
 
+void arm_machine_restart(char mode)
+{
+       /*
+        * Clean and disable cache, and turn off interrupts
+        */
+       cpu_proc_fin();
+
+       /*
+        * Tell the mm system that we are going to reboot -
+        * we may need it to insert some 1:1 mappings so that
+        * soft boot works.
+        */
+       setup_mm_for_reboot(mode);
+
+       /*
+        * Now call the architecture specific reboot code.
+        */
+       arch_reset(mode);
+
+       /*
+        * Whoops - the architecture was unable to reboot.
+        * Tell the user!
+        */
+       mdelay(1000);
+       printk("Reboot failed -- System halted\n");
+       while (1);
+}
+
 /*
- * The following aren't currently used.
+ * Function pointers to optional machine specific functions
  */
 void (*pm_idle)(void);
 EXPORT_SYMBOL(pm_idle);
@@ -80,6 +110,10 @@ EXPORT_SYMBOL(pm_idle);
 void (*pm_power_off)(void);
 EXPORT_SYMBOL(pm_power_off);
 
+void (*arm_pm_restart)(char str) = arm_machine_restart;
+EXPORT_SYMBOL_GPL(arm_pm_restart);
+
+
 /*
  * This is our default idle handler.  We need to disable
  * interrupts here to ensure we don't miss a wakeup call.
@@ -151,33 +185,9 @@ void machine_power_off(void)
                pm_power_off();
 }
 
-
 void machine_restart(char * __unused)
 {
-       /*
-        * Clean and disable cache, and turn off interrupts
-        */
-       cpu_proc_fin();
-
-       /*
-        * Tell the mm system that we are going to reboot -
-        * we may need it to insert some 1:1 mappings so that
-        * soft boot works.
-        */
-       setup_mm_for_reboot(reboot_mode);
-
-       /*
-        * Now call the architecture specific reboot code.
-        */
-       arch_reset(reboot_mode);
-
-       /*
-        * Whoops - the architecture was unable to reboot.
-        * Tell the user!
-        */
-       mdelay(1000);
-       printk("Reboot failed -- System halted\n");
-       while (1);
+       arm_pm_restart(reboot_mode);
 }
 
 void __show_regs(struct pt_regs *regs)
@@ -264,8 +274,12 @@ void show_fpregs(struct user_fp *regs)
 /*
  * Task structure and kernel stack allocation.
  */
-static unsigned long *thread_info_head;
-static unsigned int nr_thread_info;
+struct thread_info_list {
+       unsigned long *head;
+       unsigned int nr;
+};
+
+static DEFINE_PER_CPU(struct thread_info_list, thread_info_list) = { NULL, 0 };
 
 #define EXTRA_TASK_STRUCT      4
 
@@ -274,12 +288,15 @@ struct thread_info *alloc_thread_info(struct task_struct *task)
        struct thread_info *thread = NULL;
 
        if (EXTRA_TASK_STRUCT) {
-               unsigned long *p = thread_info_head;
+               struct thread_info_list *th = &get_cpu_var(thread_info_list);
+               unsigned long *p = th->head;
 
                if (p) {
-                       thread_info_head = (unsigned long *)p[0];
-                       nr_thread_info -= 1;
+                       th->head = (unsigned long *)p[0];
+                       th->nr -= 1;
                }
+               put_cpu_var(thread_info_list);
+
                thread = (struct thread_info *)p;
        }
 
@@ -300,13 +317,19 @@ struct thread_info *alloc_thread_info(struct task_struct *task)
 
 void free_thread_info(struct thread_info *thread)
 {
-       if (EXTRA_TASK_STRUCT && nr_thread_info < EXTRA_TASK_STRUCT) {
-               unsigned long *p = (unsigned long *)thread;
-               p[0] = (unsigned long)thread_info_head;
-               thread_info_head = p;
-               nr_thread_info += 1;
-       } else
-               free_pages((unsigned long)thread, THREAD_SIZE_ORDER);
+       if (EXTRA_TASK_STRUCT) {
+               struct thread_info_list *th = &get_cpu_var(thread_info_list);
+               if (th->nr < EXTRA_TASK_STRUCT) {
+                       unsigned long *p = (unsigned long *)thread;
+                       p[0] = (unsigned long)th->head;
+                       th->head = p;
+                       th->nr += 1;
+                       put_cpu_var(thread_info_list);
+                       return;
+               }
+               put_cpu_var(thread_info_list);
+       }
+       free_pages((unsigned long)thread, THREAD_SIZE_ORDER);
 }
 
 /*
@@ -316,13 +339,9 @@ void exit_thread(void)
 {
 }
 
-static void default_fp_init(union fp_state *fp)
-{
-       memset(fp, 0, sizeof(union fp_state));
-}
+ATOMIC_NOTIFIER_HEAD(thread_notify_head);
 
-void (*fp_init)(union fp_state *) = default_fp_init;
-EXPORT_SYMBOL(fp_init);
+EXPORT_SYMBOL_GPL(thread_notify_head);
 
 void flush_thread(void)
 {
@@ -331,22 +350,21 @@ void flush_thread(void)
 
        memset(thread->used_cp, 0, sizeof(thread->used_cp));
        memset(&tsk->thread.debug, 0, sizeof(struct debug_info));
+       memset(&thread->fpstate, 0, sizeof(union fp_state));
+
+       thread_notify(THREAD_NOTIFY_FLUSH, thread);
 #if defined(CONFIG_IWMMXT)
        iwmmxt_task_release(thread);
-#endif
-       fp_init(&thread->fpstate);
-#if defined(CONFIG_VFP)
-       vfp_flush_thread(&thread->vfpstate);
 #endif
 }
 
 void release_thread(struct task_struct *dead_task)
 {
-#if defined(CONFIG_VFP)
-       vfp_release_thread(&task_thread_info(dead_task)->vfpstate);
-#endif
+       struct thread_info *thread = task_thread_info(dead_task);
+
+       thread_notify(THREAD_NOTIFY_RELEASE, thread);
 #if defined(CONFIG_IWMMXT)
-       iwmmxt_task_release(task_thread_info(dead_task));
+       iwmmxt_task_release(thread);
 #endif
 }