[ARM] Update nwfpe to use new fp_init hook.

Take FPA11_CheckInit out of the hot path, and use the fp_init hook
instead.

arch/arm/nwfpe/entry.S

@@ -73,8 +73,6 @@ nwfpe_enter:
         mov r4, lr			@ save the failure-return addresses
 	mov sl, sp
 
-	bl FPA11_CheckInit		@ check to see if we are initialised
-
         ldr r5, [sp, #60]	 	@ get contents of PC;
 	sub r8, r5, #4
 .Lx2:	ldrt r0, [r8]			@ get actual instruction into r0

arch/arm/nwfpe/entry26.S

@@ -66,7 +66,6 @@ several floating point instructions.  */
 	.globl	nwfpe_enter
 nwfpe_enter:
 	mov	sl, sp
-	bl	FPA11_CheckInit		@ check to see if we are initialised
 
 	ldr	r5, [sp, #60]		@ get contents of PC
 	bic	r5, r5, #0xfc000003

arch/arm/nwfpe/fpa11.c

@@ -34,7 +34,7 @@ unsigned int EmulateCPDT(const unsigned int);
 unsigned int EmulateCPRT(const unsigned int);
 
 /* Reset the FPA11 chip.  Called to initialize and reset the emulator. */
-void resetFPA11(void)
+static void resetFPA11(void)
 {
   int i;
   FPA11 *fpa11 = GET_FPA11();
@@ -126,16 +126,14 @@ void SetRoundingPrecision(const unsigned int opcode)
   }
 }
 
-void FPA11_CheckInit(void)
+void nwfpe_init(union fp_state *fp)
 {
-  FPA11 *fpa11 = GET_FPA11();
-  if (unlikely(fpa11->initflag == 0))
-  {
-    resetFPA11();
-    SetRoundingMode(ROUND_TO_NEAREST);
-    SetRoundingPrecision(ROUND_EXTENDED);
-    fpa11->initflag = 1;
-  }
+  FPA11 *fpa11 = (FPA11 *)fp;
+  memset(fpa11, 0, sizeof(FPA11));
+  resetFPA11();
+  SetRoundingMode(ROUND_TO_NEAREST);
+  SetRoundingPrecision(ROUND_EXTENDED);
+  fpa11->initflag = 1;
 }
 
 /* Emulate the instruction in the opcode. */

arch/arm/nwfpe/fpa11.h

@@ -80,8 +80,8 @@ typedef struct tagFPA11 {
 					   initialised. */
 } FPA11;
 
-extern void resetFPA11(void);
 extern void SetRoundingMode(const unsigned int);
 extern void SetRoundingPrecision(const unsigned int);
+extern void nwfpe_init(union fp_state *fp);
 
 #endif

arch/arm/nwfpe/fpmodule.c

@@ -42,10 +42,8 @@
 #include "fpa11.inl"
 
 /* kernel symbols required for signal handling */
-typedef struct task_struct*	PTASK;
-
 #ifdef MODULE
-void fp_send_sig(unsigned long sig, PTASK p, int priv);
+void fp_send_sig(unsigned long sig, struct task_struct *p, int priv);
 #if LINUX_VERSION_CODE > 0x20115
 MODULE_AUTHOR("Scott Bambrough <scottb@rebel.com>");
 MODULE_DESCRIPTION("NWFPE floating point emulator");
@@ -63,9 +61,11 @@ void fp_setup(void);
 
 /* external declarations for saved kernel symbols */
 extern void (*kern_fp_enter)(void);
+extern void (*fp_init)(union fp_state *);
 
 /* Original value of fp_enter from kernel before patched by fpe_init. */ 
 static void (*orig_fp_enter)(void);
+static void (*orig_fp_init)(union fp_state *);
 
 /* forward declarations */
 extern void nwfpe_enter(void);
@@ -108,7 +108,9 @@ static int __init fpe_init(void)
 
   /* Save pointer to the old FP handler and then patch ourselves in */
   orig_fp_enter = kern_fp_enter;
+  orig_fp_init = fp_init;
   kern_fp_enter = nwfpe_enter;
+  fp_init = nwfpe_init;
 
   return 0;
 }
@@ -117,6 +119,7 @@ static void __exit fpe_exit(void)
 {
   /* Restore the values we saved earlier. */
   kern_fp_enter = orig_fp_enter;
+  fp_init = orig_fp_init;
 }
 
 /*