8 files changed, 102 insertions, 29 deletions

diff --git a/arch/arm/kernel/apm.c b/arch/arm/kernel/apm.c
index 33c55689f999..ecf4f9472d94 100644
--- a/arch/arm/kernel/apm.c
+++ b/arch/arm/kernel/apm.c
@@ -25,6 +25,7 @@
 #include <linux/list.h>
 #include <linux/init.h>
 #include <linux/completion.h>
+#include <linux/kthread.h>
 
 #include <asm/apm.h> /* apm_power_info */
 #include <asm/system.h>
@@ -80,7 +81,7 @@ struct apm_user {
  */
 static int suspends_pending;
 static int apm_disabled;
-static int arm_apm_active;
+static struct task_struct *kapmd_tsk;
 
 static DECLARE_WAIT_QUEUE_HEAD(apm_waitqueue);
 static DECLARE_WAIT_QUEUE_HEAD(apm_suspend_waitqueue);
@@ -97,7 +98,6 @@ static LIST_HEAD(apm_user_list);
  * to be suspending the system.
  */
 static DECLARE_WAIT_QUEUE_HEAD(kapmd_wait);
-static DECLARE_COMPLETION(kapmd_exit);
 static DEFINE_SPINLOCK(kapmd_queue_lock);
 static struct apm_queue kapmd_queue;
 
@@ -468,16 +468,13 @@ static int apm_get_info(char *buf, char **start, off_t fpos, int length)
 
 static int kapmd(void *arg)
 {
-        daemonize("kapmd");
-        current->flags |= PF_NOFREEZE;
-
         do {
                 apm_event_t event;
 
                 wait_event_interruptible(kapmd_wait,
-                                !queue_empty(&kapmd_queue) || !arm_apm_active);
+                                !queue_empty(&kapmd_queue) || kthread_should_stop());
 
-                if (!arm_apm_active)
+                if (kthread_should_stop())
                         break;
 
                 spin_lock_irq(&kapmd_queue_lock);
@@ -508,7 +505,7 @@ static int kapmd(void *arg)
                 }
         } while (1);
 
-        complete_and_exit(&kapmd_exit, 0);
+        return 0;
 }
 
 static int __init apm_init(void)
@@ -520,13 +517,14 @@ static int __init apm_init(void)
                 return -ENODEV;
         }
 
-        arm_apm_active = 1;
-
-        ret = kernel_thread(kapmd, NULL, CLONE_KERNEL);
-        if (ret < 0) {
-                arm_apm_active = 0;
+        kapmd_tsk = kthread_create(kapmd, NULL, "kapmd");
+        if (IS_ERR(kapmd_tsk)) {
+                ret = PTR_ERR(kapmd_tsk);
+                kapmd_tsk = NULL;
                 return ret;
         }
+        kapmd_tsk->flags |= PF_NOFREEZE;
+        wake_up_process(kapmd_tsk);
 
 #ifdef CONFIG_PROC_FS
         create_proc_info_entry("apm", 0, NULL, apm_get_info);
@@ -535,10 +533,7 @@ static int __init apm_init(void)
         ret = misc_register(&apm_device);
         if (ret != 0) {
                 remove_proc_entry("apm", NULL);
-
-                arm_apm_active = 0;
-                wake_up(&kapmd_wait);
-                wait_for_completion(&kapmd_exit);
+                kthread_stop(kapmd_tsk);
         }
 
         return ret;
@@ -549,9 +544,7 @@ static void __exit apm_exit(void)
         misc_deregister(&apm_device);
         remove_proc_entry("apm", NULL);
 
-        arm_apm_active = 0;
-        wake_up(&kapmd_wait);
-        wait_for_completion(&kapmd_exit);
+        kthread_stop(kapmd_tsk);
 }
 
 module_init(apm_init);
diff --git a/arch/arm/kernel/debug.S b/arch/arm/kernel/debug.S
index a5747e58a9dc..5617566477b4 100644
--- a/arch/arm/kernel/debug.S
+++ b/arch/arm/kernel/debug.S
@@ -21,6 +21,36 @@
 
 #if defined(CONFIG_DEBUG_ICEDCC)
                 @@ debug using ARM EmbeddedICE DCC channel
+
+#if defined(CONFIG_CPU_V6)
+
+                .macro  addruart, rx
+                .endm
+
+                .macro  senduart, rd, rx
+                mcr     p14, 0, \rd, c0, c5, 0
+                .endm
+
+                .macro  busyuart, rd, rx
+1001:
+                mrc     p14, 0, \rx, c0, c1, 0
+                tst     \rx, #0x20000000
+                beq     1001b
+                .endm
+
+                .macro  waituart, rd, rx
+                mov     \rd, #0x2000000
+1001:
+                subs    \rd, \rd, #1
+                bmi     1002f
+                mrc     p14, 0, \rx, c0, c1, 0
+                tst     \rx, #0x20000000
+                bne     1001b
+1002:
+                .endm
+
+#else
+
                 .macro  addruart, rx
                 .endm
 
@@ -46,9 +76,12 @@
                 bne     1001b
 1002:
                 .endm
+
+#endif  /* CONFIG_CPU_V6 */
+
 #else
 #include <asm/arch/debug-macro.S>
-#endif
+#endif  /* CONFIG_DEBUG_ICEDCC */
 
 /*
  * Useful debugging routines
diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S
index de4e33137901..bd623b73445f 100644
--- a/arch/arm/kernel/entry-armv.S
+++ b/arch/arm/kernel/entry-armv.S
@@ -191,6 +191,9 @@ __dabt_svc:
 __irq_svc:
         svc_entry
 
+#ifdef CONFIG_TRACE_IRQFLAGS
+        bl      trace_hardirqs_off
+#endif
 #ifdef CONFIG_PREEMPT
         get_thread_info tsk
         ldr     r8, [tsk, #TI_PREEMPT]          @ get preempt count
@@ -211,6 +214,10 @@ preempt_return:
 #endif
         ldr     r0, [sp, #S_PSR]                @ irqs are already disabled
         msr     spsr_cxsf, r0
+#ifdef CONFIG_TRACE_IRQFLAGS
+        tst     r0, #PSR_I_BIT
+        bleq    trace_hardirqs_on
+#endif
         ldmia   sp, {r0 - pc}^                  @ load r0 - pc, cpsr
 
         .ltorg
@@ -398,6 +405,9 @@ __dabt_usr:
 __irq_usr:
         usr_entry
 
+#ifdef CONFIG_TRACE_IRQFLAGS
+        bl      trace_hardirqs_off
+#endif
         get_thread_info tsk
 #ifdef CONFIG_PREEMPT
         ldr     r8, [tsk, #TI_PREEMPT]          @ get preempt count
@@ -412,6 +422,9 @@ __irq_usr:
         teq     r0, r7
         strne   r0, [r0, -r0]
 #endif
+#ifdef CONFIG_TRACE_IRQFLAGS
+        bl      trace_hardirqs_on
+#endif
 
         mov     why, #0
         b       ret_to_user
diff --git a/arch/arm/kernel/head-nommu.S b/arch/arm/kernel/head-nommu.S
index ac9eb3d30518..f359a189dcf2 100644
--- a/arch/arm/kernel/head-nommu.S
+++ b/arch/arm/kernel/head-nommu.S
@@ -9,7 +9,6 @@
  * published by the Free Software Foundation.
  *
  *  Common kernel startup code (non-paged MM)
- *    for 32-bit CPUs which has a process ID register(CP15).
  *
  */
 #include <linux/linkage.h>
@@ -40,7 +39,11 @@
 ENTRY(stext)
         msr     cpsr_c, #PSR_F_BIT | PSR_I_BIT | SVC_MODE @ ensure svc mode
                                                 @ and irqs disabled
+#ifndef CONFIG_CPU_CP15
+        ldr     r9, =CONFIG_PROCESSOR_ID
+#else
         mrc     p15, 0, r9, c0, c0              @ get processor id
+#endif
         bl      __lookup_processor_type         @ r5=procinfo r9=cpuid
         movs    r10, r5                         @ invalid processor (r5=0)?
         beq     __error_p                               @ yes, error 'p'
@@ -58,6 +61,7 @@ ENTRY(stext)
  */
         .type   __after_proc_init, %function
 __after_proc_init:
+#ifdef CONFIG_CPU_CP15
         mrc     p15, 0, r0, c1, c0, 0           @ read control reg
 #ifdef CONFIG_ALIGNMENT_TRAP
         orr     r0, r0, #CR_A
@@ -73,7 +77,13 @@ __after_proc_init:
 #ifdef CONFIG_CPU_ICACHE_DISABLE
         bic     r0, r0, #CR_I
 #endif
+#ifdef CONFIG_CPU_HIGH_VECTOR
+        orr     r0, r0, #CR_V
+#else
+        bic     r0, r0, #CR_V
+#endif
         mcr     p15, 0, r0, c1, c0, 0           @ write control reg
+#endif /* CONFIG_CPU_CP15 */
 
         mov     pc, r13                         @ clear the BSS and jump
                                                 @ to start_kernel
diff --git a/arch/arm/kernel/module.c b/arch/arm/kernel/module.c
index 298363d97047..1b061583408e 100644
--- a/arch/arm/kernel/module.c
+++ b/arch/arm/kernel/module.c
@@ -2,6 +2,7 @@
  *  linux/arch/arm/kernel/module.c
  *
  *  Copyright (C) 2002 Russell King.
+ *  Modified for nommu by Hyok S. Choi
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
@@ -32,6 +33,7 @@ extern void _etext;
 #define MODULE_START    (((unsigned long)&_etext + ~PGDIR_MASK) & PGDIR_MASK)
 #endif
 
+#ifdef CONFIG_MMU
 void *module_alloc(unsigned long size)
 {
         struct vm_struct *area;
@@ -46,6 +48,12 @@ void *module_alloc(unsigned long size)
 
         return __vmalloc_area(area, GFP_KERNEL, PAGE_KERNEL);
 }
+#else /* CONFIG_MMU */
+void *module_alloc(unsigned long size)
+{
+        return size == 0 ? NULL : vmalloc(size);
+}
+#endif /* !CONFIG_MMU */
 
 void module_free(struct module *module, void *region)
 {
diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
index 3079535afccd..bf35c178a877 100644
--- a/arch/arm/kernel/process.c
+++ b/arch/arm/kernel/process.c
@@ -221,16 +221,26 @@ void __show_regs(struct pt_regs *regs)
                 processor_modes[processor_mode(regs)],
                 thumb_mode(regs) ? " (T)" : "",
                 get_fs() == get_ds() ? "kernel" : "user");
+#if CONFIG_CPU_CP15
         {
-                unsigned int ctrl, transbase, dac;
+                unsigned int ctrl;
                   __asm__ (
                 "       mrc p15, 0, %0, c1, c0\n"
-                "       mrc p15, 0, %1, c2, c0\n"
-                "       mrc p15, 0, %2, c3, c0\n"
-                : "=r" (ctrl), "=r" (transbase), "=r" (dac));
-                printk("Control: %04X  Table: %08X  DAC: %08X\n",
-                        ctrl, transbase, dac);
+                : "=r" (ctrl));
+                printk("Control: %04X\n", ctrl);
         }
+#ifdef CONFIG_CPU_CP15_MMU
+        {
+                unsigned int transbase, dac;
+                  __asm__ (
+                "       mrc p15, 0, %0, c2, c0\n"
+                "       mrc p15, 0, %1, c3, c0\n"
+                : "=r" (transbase), "=r" (dac));
+                printk("Table: %08X  DAC: %08X\n",
+                        transbase, dac);
+        }
+#endif
+#endif
 }
 
 void show_regs(struct pt_regs * regs)
diff --git a/arch/arm/kernel/time.c b/arch/arm/kernel/time.c
index 09a67d771857..d4dceb5f06e9 100644
--- a/arch/arm/kernel/time.c
+++ b/arch/arm/kernel/time.c
@@ -69,10 +69,12 @@ EXPORT_SYMBOL(profile_pc);
  */
 int (*set_rtc)(void);
 
+#ifndef CONFIG_GENERIC_TIME
 static unsigned long dummy_gettimeoffset(void)
 {
         return 0;
 }
+#endif
 
 /*
  * Scheduler clock - returns current time in nanosec units.
@@ -230,6 +232,7 @@ static inline void do_leds(void)
 #define do_leds()
 #endif
 
+#ifndef CONFIG_GENERIC_TIME
 void do_gettimeofday(struct timeval *tv)
 {
         unsigned long flags;
@@ -291,6 +294,7 @@ int do_settimeofday(struct timespec *tv)
 }
 
 EXPORT_SYMBOL(do_settimeofday);
+#endif /* !CONFIG_GENERIC_TIME */
 
 /**
  * save_time_delta - Save the offset between system time and RTC time
@@ -500,8 +504,10 @@ device_initcall(timer_init_sysfs);
 
 void __init time_init(void)
 {
+#ifndef CONFIG_GENERIC_TIME
         if (system_timer->offset == NULL)
                 system_timer->offset = dummy_gettimeoffset;
+#endif
         system_timer->init();
 
 #ifdef CONFIG_NO_IDLE_HZ
diff --git a/arch/arm/kernel/traps.c b/arch/arm/kernel/traps.c
index aeeed806f991..bede380c07a9 100644
--- a/arch/arm/kernel/traps.c
+++ b/arch/arm/kernel/traps.c
@@ -191,7 +191,7 @@ void show_stack(struct task_struct *tsk, unsigned long *sp)
         if (tsk != current)
                 fp = thread_saved_fp(tsk);
         else
-                asm("mov%? %0, fp" : "=r" (fp));
+                asm("mov %0, fp" : "=r" (fp) : : "cc");
 
         c_backtrace(fp, 0x10);
         barrier();