uml: current.h cleanup

Tidy current-related stuff.  There was a comment in current.h saying
that current_thread was obsolete, so this patch turns all instances of
current_thread into current_thread_info().  There's some simplifying
of the result in arch/um/sys-i386/signal.c.

current.h and thread_info also get style cleanups.

Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

5 files changed, 20 insertions, 41 deletions

diff --git a/arch/um/kernel/process.c b/arch/um/kernel/process.c
index 570471218086..ae1942eeb994 100644
--- a/arch/um/kernel/process.c
+++ b/arch/um/kernel/process.c
@@ -251,7 +251,7 @@ void default_idle(void)
 
 void cpu_idle(void)
 {
-        cpu_tasks[current_thread->cpu].pid = os_getpid();
+        cpu_tasks[current_thread_info()->cpu].pid = os_getpid();
         default_idle();
 }
 
@@ -269,7 +269,7 @@ 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_info();
 }
 
 extern exitcall_t __uml_exitcall_begin, __uml_exitcall_end;
@@ -311,7 +311,7 @@ int strlen_user_proc(char __user *str)
 int smp_sigio_handler(void)
 {
 #ifdef CONFIG_SMP
-        int cpu = current_thread->cpu;
+        int cpu = current_thread_info()->cpu;
         IPI_handler(cpu);
         if (cpu != 0)
                 return 1;
@@ -321,7 +321,7 @@ int smp_sigio_handler(void)
 
 int cpu(void)
 {
-        return current_thread->cpu;
+        return current_thread_info()->cpu;
 }
 
 static atomic_t using_sysemu = ATOMIC_INIT(0);
diff --git a/arch/um/sys-i386/signal.c b/arch/um/sys-i386/signal.c
index 19053d46cb60..fd0c25ad6af3 100644
--- a/arch/um/sys-i386/signal.c
+++ b/arch/um/sys-i386/signal.c
@@ -168,12 +168,13 @@ static int copy_sc_from_user(struct pt_regs *regs,
                              struct sigcontext __user *from)
 {
         struct sigcontext sc;
-        int err;
+        int err, pid;
 
         err = copy_from_user(&sc, from, sizeof(sc));
         if (err)
                 return err;
 
+        pid = userspace_pid[current_thread_info()->cpu];
         copy_sc(&regs->regs, &sc);
         if (have_fpx_regs) {
                 struct user_fxsr_struct fpx;
@@ -187,8 +188,7 @@ static int copy_sc_from_user(struct pt_regs *regs,
                 if (err)
                         return 1;
 
-                err = restore_fpx_registers(userspace_pid[current_thread->cpu],
-                                            (unsigned long *) &fpx);
+                err = restore_fpx_registers(pid, (unsigned long *) &fpx);
                 if (err < 0) {
                         printk(KERN_ERR "copy_sc_from_user - "
                                "restore_fpx_registers failed, errno = %d\n",
@@ -204,8 +204,7 @@ static int copy_sc_from_user(struct pt_regs *regs,
                 if (err)
                         return 1;
 
-                err = restore_fp_registers(userspace_pid[current_thread->cpu],
-                                           (unsigned long *) &fp);
+                err = restore_fp_registers(pid, (unsigned long *) &fp);
                 if (err < 0) {
                         printk(KERN_ERR "copy_sc_from_user - "
                                "restore_fp_registers failed, errno = %d\n",
@@ -223,7 +222,7 @@ static int copy_sc_to_user(struct sigcontext __user *to,
 {
         struct sigcontext sc;
         struct faultinfo * fi = &current->thread.arch.faultinfo;
-        int err;
+        int err, pid;
 
         sc.gs = REGS_GS(regs->regs.gp);
         sc.fs = REGS_FS(regs->regs.gp);
@@ -249,11 +248,11 @@ static int copy_sc_to_user(struct sigcontext __user *to,
         to_fp = (to_fp ? to_fp : (struct _fpstate __user *) (to + 1));
         sc.fpstate = to_fp;
 
+        pid = userspace_pid[current_thread_info()->cpu];
         if (have_fpx_regs) {
                 struct user_fxsr_struct fpx;
 
-                err = save_fpx_registers(userspace_pid[current_thread->cpu],
-                                         (unsigned long *) &fpx);
+                err = save_fpx_registers(pid, (unsigned long *) &fpx);
                 if (err < 0){
                         printk(KERN_ERR "copy_sc_to_user - save_fpx_registers "
                                "failed, errno = %d\n", err);
@@ -276,8 +275,7 @@ static int copy_sc_to_user(struct sigcontext __user *to,
         else {
                 struct user_i387_struct fp;
 
-                err = save_fp_registers(userspace_pid[current_thread->cpu],
-                                        (unsigned long *) &fp);
+                err = save_fp_registers(pid, (unsigned long *) &fp);
                 if (copy_to_user(to_fp, &fp, sizeof(struct user_i387_struct)))
                         return 1;
         }
diff --git a/arch/um/sys-x86_64/signal.c b/arch/um/sys-x86_64/signal.c
index 14070181407b..1a899a7ed7a6 100644
--- a/arch/um/sys-x86_64/signal.c
+++ b/arch/um/sys-x86_64/signal.c
@@ -81,7 +81,7 @@ static int copy_sc_from_user(struct pt_regs *regs,
         if (err)
                 return 1;
 
-        err = restore_fp_registers(userspace_pid[current_thread->cpu],
+        err = restore_fp_registers(userspace_pid[current_thread_info()->cpu],
                                    (unsigned long *) &fp);
         if (err < 0) {
                 printk(KERN_ERR "copy_sc_from_user - "
@@ -143,7 +143,7 @@ static int copy_sc_to_user(struct sigcontext __user *to,
         if (err)
                 return 1;
 
-        err = save_fp_registers(userspace_pid[current_thread->cpu],
+        err = save_fp_registers(userspace_pid[current_thread_info()->cpu],
                                 (unsigned long *) &fp);
         if (err < 0) {
                 printk(KERN_ERR "copy_sc_from_user - restore_fp_registers "
diff --git a/include/asm-um/current.h b/include/asm-um/current.h
index 8fd72f69ce65..c2191d9aa03d 100644
--- a/include/asm-um/current.h
+++ b/include/asm-um/current.h
@@ -1,32 +1,13 @@
-/* 
- * Copyright (C) 2000 Jeff Dike (jdike@karaya.com)
+/*
+ * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
  * Licensed under the GPL
  */
 
 #ifndef __UM_CURRENT_H
 #define __UM_CURRENT_H
 
-#ifndef __ASSEMBLY__
-
-#include "asm/page.h"
 #include "linux/thread_info.h"
 
 #define current (current_thread_info()->task)
 
-/*Backward compatibility - it's used inside arch/um.*/
-#define current_thread current_thread_info()
-
-#endif /* __ASSEMBLY__ */
-
 #endif
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only.  This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
diff --git a/include/asm-um/thread_info.h b/include/asm-um/thread_info.h
index cdfc91cb77a8..356b83e2c22e 100644
--- a/include/asm-um/thread_info.h
+++ b/include/asm-um/thread_info.h
@@ -1,5 +1,5 @@
-/* 
- * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
+/*
+ * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
  * Licensed under the GPL
  */
 
@@ -76,8 +76,8 @@ static inline struct thread_info *current_thread_info(void)
 #define TIF_SYSCALL_TRACE       0       /* syscall trace active */
 #define TIF_SIGPENDING          1       /* signal pending */
 #define TIF_NEED_RESCHED        2       /* rescheduling necessary */
-#define TIF_POLLING_NRFLAG      3       /* true if poll_idle() is polling 
-                                         * TIF_NEED_RESCHED 
+#define TIF_POLLING_NRFLAG      3       /* true if poll_idle() is polling
+                                         * TIF_NEED_RESCHED
                                          */
 #define TIF_RESTART_BLOCK       4
 #define TIF_MEMDIE              5