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-rw-r--r--arch/um/kernel/process.c125
1 files changed, 35 insertions, 90 deletions
diff --git a/arch/um/kernel/process.c b/arch/um/kernel/process.c
index 348b272bb766..8d2c5496532b 100644
--- a/arch/um/kernel/process.c
+++ b/arch/um/kernel/process.c
@@ -32,8 +32,8 @@
#include "asm/tlbflush.h"
#include "asm/uaccess.h"
#include "asm/user.h"
-#include "user_util.h"
#include "kern_util.h"
+#include "as-layout.h"
#include "kern.h"
#include "signal_kern.h"
#include "init.h"
@@ -54,11 +54,9 @@
*/
struct cpu_task cpu_tasks[NR_CPUS] = { [0 ... NR_CPUS - 1] = { -1, NULL } };
-int external_pid(void *t)
+static inline int external_pid(struct task_struct *task)
{
- struct task_struct *task = t ? t : current;
-
- return(CHOOSE_MODE_PROC(external_pid_tt, external_pid_skas, task));
+ return CHOOSE_MODE_PROC(external_pid_tt, external_pid_skas, task);
}
int pid_to_processor_id(int pid)
@@ -66,9 +64,10 @@ int pid_to_processor_id(int pid)
int i;
for(i = 0; i < ncpus; i++){
- if(cpu_tasks[i].pid == pid) return(i);
+ if(cpu_tasks[i].pid == pid)
+ return i;
}
- return(-1);
+ return -1;
}
void free_stack(unsigned long stack, int order)
@@ -85,9 +84,9 @@ unsigned long alloc_stack(int order, int atomic)
flags = GFP_ATOMIC;
page = __get_free_pages(flags, order);
if(page == 0)
- return(0);
+ return 0;
stack_protections(page);
- return(page);
+ return page;
}
int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
@@ -98,15 +97,11 @@ int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
current->thread.request.u.thread.arg = arg;
pid = do_fork(CLONE_VM | CLONE_UNTRACED | flags, 0,
&current->thread.regs, 0, NULL, NULL);
- if(pid < 0)
- panic("do_fork failed in kernel_thread, errno = %d", pid);
- return(pid);
+ return pid;
}
-void set_current(void *t)
+static inline void set_current(struct task_struct *task)
{
- struct task_struct *task = t;
-
cpu_tasks[task_thread_info(task)->cpu] = ((struct cpu_task)
{ external_pid(task), task });
}
@@ -128,14 +123,16 @@ void *_switch_to(void *prev, void *next, void *last)
prev= current;
} while(current->thread.saved_task);
- return(current->thread.prev_sched);
+ return current->thread.prev_sched;
}
void interrupt_end(void)
{
- if(need_resched()) schedule();
- if(test_tsk_thread_flag(current, TIF_SIGPENDING)) do_signal();
+ if(need_resched())
+ schedule();
+ if(test_tsk_thread_flag(current, TIF_SIGPENDING))
+ do_signal();
}
void release_thread(struct task_struct *task)
@@ -150,7 +147,7 @@ void exit_thread(void)
void *get_current(void)
{
- return(current);
+ return current;
}
int copy_thread(int nr, unsigned long clone_flags, unsigned long sp,
@@ -188,15 +185,12 @@ void initial_thread_cb(void (*proc)(void *), void *arg)
kmalloc_ok = save_kmalloc_ok;
}
+#ifdef CONFIG_MODE_TT
unsigned long stack_sp(unsigned long page)
{
- return(page + PAGE_SIZE - sizeof(void *));
-}
-
-int current_pid(void)
-{
- return(current->pid);
+ return page + PAGE_SIZE - sizeof(void *);
}
+#endif
void default_idle(void)
{
@@ -221,11 +215,6 @@ void cpu_idle(void)
CHOOSE_MODE(init_idle_tt(), init_idle_skas());
}
-int page_size(void)
-{
- return(PAGE_SIZE);
-}
-
void *um_virt_to_phys(struct task_struct *task, unsigned long addr,
pte_t *pte_out)
{
@@ -236,68 +225,43 @@ void *um_virt_to_phys(struct task_struct *task, unsigned long addr,
pte_t ptent;
if(task->mm == NULL)
- return(ERR_PTR(-EINVAL));
+ return ERR_PTR(-EINVAL);
pgd = pgd_offset(task->mm, addr);
if(!pgd_present(*pgd))
- return(ERR_PTR(-EINVAL));
+ return ERR_PTR(-EINVAL);
pud = pud_offset(pgd, addr);
if(!pud_present(*pud))
- return(ERR_PTR(-EINVAL));
+ return ERR_PTR(-EINVAL);
pmd = pmd_offset(pud, addr);
if(!pmd_present(*pmd))
- return(ERR_PTR(-EINVAL));
+ return ERR_PTR(-EINVAL);
pte = pte_offset_kernel(pmd, addr);
ptent = *pte;
if(!pte_present(ptent))
- return(ERR_PTR(-EINVAL));
+ return ERR_PTR(-EINVAL);
if(pte_out != NULL)
*pte_out = ptent;
- return((void *) (pte_val(ptent) & PAGE_MASK) + (addr & ~PAGE_MASK));
+ return (void *) (pte_val(ptent) & PAGE_MASK) + (addr & ~PAGE_MASK);
}
char *current_cmd(void)
{
#if defined(CONFIG_SMP) || defined(CONFIG_HIGHMEM)
- return("(Unknown)");
+ return "(Unknown)";
#else
void *addr = um_virt_to_phys(current, current->mm->arg_start, NULL);
return IS_ERR(addr) ? "(Unknown)": __va((unsigned long) addr);
#endif
}
-void force_sigbus(void)
-{
- printk(KERN_ERR "Killing pid %d because of a lack of memory\n",
- current->pid);
- lock_kernel();
- sigaddset(&current->pending.signal, SIGBUS);
- recalc_sigpending();
- current->flags |= PF_SIGNALED;
- do_exit(SIGBUS | 0x80);
-}
-
void dump_thread(struct pt_regs *regs, struct user *u)
{
}
-void enable_hlt(void)
-{
- panic("enable_hlt");
-}
-
-EXPORT_SYMBOL(enable_hlt);
-
-void disable_hlt(void)
-{
- panic("disable_hlt");
-}
-
-EXPORT_SYMBOL(disable_hlt);
-
void *um_kmalloc(int size)
{
return kmalloc(size, GFP_KERNEL);
@@ -313,36 +277,17 @@ void *um_vmalloc(int size)
return vmalloc(size);
}
-void *um_vmalloc_atomic(int size)
-{
- return __vmalloc(size, GFP_ATOMIC | __GFP_HIGHMEM, PAGE_KERNEL);
-}
-
int __cant_sleep(void) {
return in_atomic() || irqs_disabled() || in_interrupt();
/* Is in_interrupt() really needed? */
}
-unsigned long get_fault_addr(void)
-{
- return((unsigned long) current->thread.fault_addr);
-}
-
-EXPORT_SYMBOL(get_fault_addr);
-
-void not_implemented(void)
-{
- printk(KERN_DEBUG "Something isn't implemented in here\n");
-}
-
-EXPORT_SYMBOL(not_implemented);
-
int user_context(unsigned long sp)
{
unsigned long stack;
stack = sp & (PAGE_MASK << CONFIG_KERNEL_STACK_ORDER);
- return(stack != (unsigned long) current_thread);
+ return stack != (unsigned long) current_thread;
}
extern exitcall_t __uml_exitcall_begin, __uml_exitcall_end;
@@ -363,22 +308,22 @@ char *uml_strdup(char *string)
int copy_to_user_proc(void __user *to, void *from, int size)
{
- return(copy_to_user(to, from, size));
+ return copy_to_user(to, from, size);
}
int copy_from_user_proc(void *to, void __user *from, int size)
{
- return(copy_from_user(to, from, size));
+ return copy_from_user(to, from, size);
}
int clear_user_proc(void __user *buf, int size)
{
- return(clear_user(buf, size));
+ return clear_user(buf, size);
}
int strlen_user_proc(char __user *str)
{
- return(strlen_user(str));
+ return strlen_user(str);
}
int smp_sigio_handler(void)
@@ -387,14 +332,14 @@ int smp_sigio_handler(void)
int cpu = current_thread->cpu;
IPI_handler(cpu);
if(cpu != 0)
- return(1);
+ return 1;
#endif
- return(0);
+ return 0;
}
int cpu(void)
{
- return(current_thread->cpu);
+ return current_thread->cpu;
}
static atomic_t using_sysemu = ATOMIC_INIT(0);
@@ -443,7 +388,7 @@ int __init make_proc_sysemu(void)
if (ent == NULL)
{
printk(KERN_WARNING "Failed to register /proc/sysemu\n");
- return(0);
+ return 0;
}
ent->read_proc = proc_read_sysemu;
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