[MIPS] Unify mips_fpu_soft_struct and mips_fpu_hard_structs.

The struct mips_fpu_soft_struct and mips_fpu_hard_struct are
completely same now and the kernel fpu emulator assumes that.  This
patch unifies them to mips_fpu_struct and get rid of mips_fpu_union.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

6 files changed, 52 insertions, 69 deletions

diff --git a/arch/mips/kernel/asm-offsets.c b/arch/mips/kernel/asm-offsets.c
index 0facfaf..f1bb6a2 100644
--- a/arch/mips/kernel/asm-offsets.c
+++ b/arch/mips/kernel/asm-offsets.c
@@ -141,72 +141,72 @@ void output_thread_defines(void)
 void output_thread_fpu_defines(void)
 {
 	offset("#define THREAD_FPR0    ",
-	       struct task_struct, thread.fpu.hard.fpr[0]);
+	       struct task_struct, thread.fpu.fpr[0]);
 	offset("#define THREAD_FPR1    ",
-	       struct task_struct, thread.fpu.hard.fpr[1]);
+	       struct task_struct, thread.fpu.fpr[1]);
 	offset("#define THREAD_FPR2    ",
-	       struct task_struct, thread.fpu.hard.fpr[2]);
+	       struct task_struct, thread.fpu.fpr[2]);
 	offset("#define THREAD_FPR3    ",
-	       struct task_struct, thread.fpu.hard.fpr[3]);
+	       struct task_struct, thread.fpu.fpr[3]);
 	offset("#define THREAD_FPR4    ",
-	       struct task_struct, thread.fpu.hard.fpr[4]);
+	       struct task_struct, thread.fpu.fpr[4]);
 	offset("#define THREAD_FPR5    ",
-	       struct task_struct, thread.fpu.hard.fpr[5]);
+	       struct task_struct, thread.fpu.fpr[5]);
 	offset("#define THREAD_FPR6    ",
-	       struct task_struct, thread.fpu.hard.fpr[6]);
+	       struct task_struct, thread.fpu.fpr[6]);
 	offset("#define THREAD_FPR7    ",
-	       struct task_struct, thread.fpu.hard.fpr[7]);
+	       struct task_struct, thread.fpu.fpr[7]);
 	offset("#define THREAD_FPR8    ",
-	       struct task_struct, thread.fpu.hard.fpr[8]);
+	       struct task_struct, thread.fpu.fpr[8]);
 	offset("#define THREAD_FPR9    ",
-	       struct task_struct, thread.fpu.hard.fpr[9]);
+	       struct task_struct, thread.fpu.fpr[9]);
 	offset("#define THREAD_FPR10   ",
-	       struct task_struct, thread.fpu.hard.fpr[10]);
+	       struct task_struct, thread.fpu.fpr[10]);
 	offset("#define THREAD_FPR11   ",
-	       struct task_struct, thread.fpu.hard.fpr[11]);
+	       struct task_struct, thread.fpu.fpr[11]);
 	offset("#define THREAD_FPR12   ",
-	       struct task_struct, thread.fpu.hard.fpr[12]);
+	       struct task_struct, thread.fpu.fpr[12]);
 	offset("#define THREAD_FPR13   ",
-	       struct task_struct, thread.fpu.hard.fpr[13]);
+	       struct task_struct, thread.fpu.fpr[13]);
 	offset("#define THREAD_FPR14   ",
-	       struct task_struct, thread.fpu.hard.fpr[14]);
+	       struct task_struct, thread.fpu.fpr[14]);
 	offset("#define THREAD_FPR15   ",
-	       struct task_struct, thread.fpu.hard.fpr[15]);
+	       struct task_struct, thread.fpu.fpr[15]);
 	offset("#define THREAD_FPR16   ",
-	       struct task_struct, thread.fpu.hard.fpr[16]);
+	       struct task_struct, thread.fpu.fpr[16]);
 	offset("#define THREAD_FPR17   ",
-	       struct task_struct, thread.fpu.hard.fpr[17]);
+	       struct task_struct, thread.fpu.fpr[17]);
 	offset("#define THREAD_FPR18   ",
-	       struct task_struct, thread.fpu.hard.fpr[18]);
+	       struct task_struct, thread.fpu.fpr[18]);
 	offset("#define THREAD_FPR19   ",
-	       struct task_struct, thread.fpu.hard.fpr[19]);
+	       struct task_struct, thread.fpu.fpr[19]);
 	offset("#define THREAD_FPR20   ",
-	       struct task_struct, thread.fpu.hard.fpr[20]);
+	       struct task_struct, thread.fpu.fpr[20]);
 	offset("#define THREAD_FPR21   ",
-	       struct task_struct, thread.fpu.hard.fpr[21]);
+	       struct task_struct, thread.fpu.fpr[21]);
 	offset("#define THREAD_FPR22   ",
-	       struct task_struct, thread.fpu.hard.fpr[22]);
+	       struct task_struct, thread.fpu.fpr[22]);
 	offset("#define THREAD_FPR23   ",
-	       struct task_struct, thread.fpu.hard.fpr[23]);
+	       struct task_struct, thread.fpu.fpr[23]);
 	offset("#define THREAD_FPR24   ",
-	       struct task_struct, thread.fpu.hard.fpr[24]);
+	       struct task_struct, thread.fpu.fpr[24]);
 	offset("#define THREAD_FPR25   ",
-	       struct task_struct, thread.fpu.hard.fpr[25]);
+	       struct task_struct, thread.fpu.fpr[25]);
 	offset("#define THREAD_FPR26   ",
-	       struct task_struct, thread.fpu.hard.fpr[26]);
+	       struct task_struct, thread.fpu.fpr[26]);
 	offset("#define THREAD_FPR27   ",
-	       struct task_struct, thread.fpu.hard.fpr[27]);
+	       struct task_struct, thread.fpu.fpr[27]);
 	offset("#define THREAD_FPR28   ",
-	       struct task_struct, thread.fpu.hard.fpr[28]);
+	       struct task_struct, thread.fpu.fpr[28]);
 	offset("#define THREAD_FPR29   ",
-	       struct task_struct, thread.fpu.hard.fpr[29]);
+	       struct task_struct, thread.fpu.fpr[29]);
 	offset("#define THREAD_FPR30   ",
-	       struct task_struct, thread.fpu.hard.fpr[30]);
+	       struct task_struct, thread.fpu.fpr[30]);
 	offset("#define THREAD_FPR31   ",
-	       struct task_struct, thread.fpu.hard.fpr[31]);
+	       struct task_struct, thread.fpu.fpr[31]);
 
 	offset("#define THREAD_FCR31   ",
-	       struct task_struct, thread.fpu.hard.fcr31);
+	       struct task_struct, thread.fpu.fcr31);
 	linefeed;
 }
 
diff --git a/arch/mips/kernel/branch.c b/arch/mips/kernel/branch.c
index b6232d9..76fd3f2 100644
--- a/arch/mips/kernel/branch.c
+++ b/arch/mips/kernel/branch.c
@@ -178,7 +178,7 @@ int __compute_return_epc(struct pt_regs *regs)
 		if (is_fpu_owner())
 			asm volatile("cfc1\t%0,$31" : "=r" (fcr31));
 		else
-			fcr31 = current->thread.fpu.hard.fcr31;
+			fcr31 = current->thread.fpu.fcr31;
 		preempt_enable();
 
 		bit = (insn.i_format.rt >> 2);
diff --git a/arch/mips/kernel/irixsig.c b/arch/mips/kernel/irixsig.c
index 8150f07..a9bf6cc 100644
--- a/arch/mips/kernel/irixsig.c
+++ b/arch/mips/kernel/irixsig.c
@@ -260,7 +260,7 @@ irix_sigreturn(struct pt_regs *regs)
 
 		for(i = 0; i < 32; i++)
 			error |= __get_user(fregs[i], &context->fpregs[i]);
-		error |= __get_user(current->thread.fpu.hard.fcr31, &context->fpcsr);
+		error |= __get_user(current->thread.fpu.fcr31, &context->fpcsr);
 	}
 
 	/* XXX do sigstack crapola here... XXX */
diff --git a/arch/mips/kernel/ptrace.c b/arch/mips/kernel/ptrace.c
index 9b4733c..1d44025 100644
--- a/arch/mips/kernel/ptrace.c
+++ b/arch/mips/kernel/ptrace.c
@@ -120,11 +120,11 @@ int ptrace_getfpregs (struct task_struct *child, __u32 __user *data)
 			__put_user ((__u64) -1, i + (__u64 __user *) data);
 	}
 
+	__put_user (child->thread.fpu.fcr31, data + 64);
+
 	if (cpu_has_fpu) {
 		unsigned int flags, tmp;
 
-		__put_user (child->thread.fpu.hard.fcr31, data + 64);
-
 		preempt_disable();
 		if (cpu_has_mipsmt) {
 			unsigned int vpflags = dvpe();
@@ -142,7 +142,6 @@ int ptrace_getfpregs (struct task_struct *child, __u32 __user *data)
 		preempt_enable();
 		__put_user (tmp, data + 65);
 	} else {
-		__put_user (child->thread.fpu.soft.fcr31, data + 64);
 		__put_user ((__u32) 0, data + 65);
 	}
 
@@ -162,10 +161,7 @@ int ptrace_setfpregs (struct task_struct *child, __u32 __user *data)
 	for (i = 0; i < 32; i++)
 		__get_user (fregs[i], i + (__u64 __user *) data);
 
-	if (cpu_has_fpu)
-		__get_user (child->thread.fpu.hard.fcr31, data + 64);
-	else
-		__get_user (child->thread.fpu.soft.fcr31, data + 64);
+	__get_user (child->thread.fpu.fcr31, data + 64);
 
 	/* FIR may not be written.  */
 
@@ -241,10 +237,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 			tmp = regs->lo;
 			break;
 		case FPC_CSR:
-			if (cpu_has_fpu)
-				tmp = child->thread.fpu.hard.fcr31;
-			else
-				tmp = child->thread.fpu.soft.fcr31;
+			tmp = child->thread.fpu.fcr31;
 			break;
 		case FPC_EIR: {	/* implementation / version register */
 			unsigned int flags;
@@ -336,9 +329,9 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 
 			if (!tsk_used_math(child)) {
 				/* FP not yet used  */
-				memset(&child->thread.fpu.hard, ~0,
-				       sizeof(child->thread.fpu.hard));
-				child->thread.fpu.hard.fcr31 = 0;
+				memset(&child->thread.fpu, ~0,
+				       sizeof(child->thread.fpu));
+				child->thread.fpu.fcr31 = 0;
 			}
 #ifdef CONFIG_32BIT
 			/*
@@ -369,10 +362,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 			regs->lo = data;
 			break;
 		case FPC_CSR:
-			if (cpu_has_fpu)
-				child->thread.fpu.hard.fcr31 = data;
-			else
-				child->thread.fpu.soft.fcr31 = data;
+			child->thread.fpu.fcr31 = data;
 			break;
 		case DSP_BASE ... DSP_BASE + 5: {
 			dspreg_t *dregs;
diff --git a/arch/mips/kernel/ptrace32.c b/arch/mips/kernel/ptrace32.c
index 8704dc0..f40ecd8 100644
--- a/arch/mips/kernel/ptrace32.c
+++ b/arch/mips/kernel/ptrace32.c
@@ -166,10 +166,7 @@ asmlinkage int sys32_ptrace(int request, int pid, int addr, int data)
 			tmp = regs->lo;
 			break;
 		case FPC_CSR:
-			if (cpu_has_fpu)
-				tmp = child->thread.fpu.hard.fcr31;
-			else
-				tmp = child->thread.fpu.soft.fcr31;
+			tmp = child->thread.fpu.fcr31;
 			break;
 		case FPC_EIR: {	/* implementation / version register */
 			unsigned int flags;
@@ -288,9 +285,9 @@ asmlinkage int sys32_ptrace(int request, int pid, int addr, int data)
 
 			if (!tsk_used_math(child)) {
 				/* FP not yet used  */
-				memset(&child->thread.fpu.hard, ~0,
-				       sizeof(child->thread.fpu.hard));
-				child->thread.fpu.hard.fcr31 = 0;
+				memset(&child->thread.fpu, ~0,
+				       sizeof(child->thread.fpu));
+				child->thread.fpu.fcr31 = 0;
 			}
 			/*
 			 * The odd registers are actually the high order bits
@@ -318,10 +315,7 @@ asmlinkage int sys32_ptrace(int request, int pid, int addr, int data)
 			regs->lo = data;
 			break;
 		case FPC_CSR:
-			if (cpu_has_fpu)
-				child->thread.fpu.hard.fcr31 = data;
-			else
-				child->thread.fpu.soft.fcr31 = data;
+			child->thread.fpu.fcr31 = data;
 			break;
 		case DSP_BASE ... DSP_BASE + 5: {
 			dspreg_t *dregs;
diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c
index a7564b0..ad16ece 100644
--- a/arch/mips/kernel/traps.c
+++ b/arch/mips/kernel/traps.c
@@ -65,7 +65,7 @@ extern asmlinkage void handle_mcheck(void);
 extern asmlinkage void handle_reserved(void);
 
 extern int fpu_emulator_cop1Handler(struct pt_regs *xcp,
-	struct mips_fpu_soft_struct *ctx);
+	struct mips_fpu_struct *ctx);
 
 void (*board_be_init)(void);
 int (*board_be_handler)(struct pt_regs *regs, int is_fixup);
@@ -600,8 +600,7 @@ asmlinkage void do_fpe(struct pt_regs *regs, unsigned long fcr31)
 		preempt_enable();
 
 		/* Run the emulator */
-		sig = fpu_emulator_cop1Handler (regs,
-			&current->thread.fpu.soft);
+		sig = fpu_emulator_cop1Handler (regs, &current->thread.fpu);
 
 		preempt_disable();
 
@@ -610,7 +609,7 @@ asmlinkage void do_fpe(struct pt_regs *regs, unsigned long fcr31)
 		 * We can't allow the emulated instruction to leave any of
 		 * the cause bit set in $fcr31.
 		 */
-		current->thread.fpu.soft.fcr31 &= ~FPU_CSR_ALL_X;
+		current->thread.fpu.fcr31 &= ~FPU_CSR_ALL_X;
 
 		/* Restore the hardware register state */
 		restore_fp(current);
@@ -755,7 +754,7 @@ asmlinkage void do_cpu(struct pt_regs *regs)
 
 		if (!cpu_has_fpu) {
 			int sig = fpu_emulator_cop1Handler(regs,
-						&current->thread.fpu.soft);
+						&current->thread.fpu);
 			if (sig)
 				force_sig(sig, current);
 #ifdef CONFIG_MIPS_MT_FPAFF