[SPARC64]: Move kernel unaligned trap handlers into assembler file.

GCC 4.x really dislikes the games we are playing in
unaligned.c, and the cleanest way to fix this is to
move things into assembler.

Noted by Al Viro.

Signed-off-by: David S. Miller <davem@davemloft.net>

arch/sparc64/kernel/Makefile

@@ -8,7 +8,7 @@ EXTRA_CFLAGS := -Werror
 extra-y		:= head.o init_task.o vmlinux.lds
 
 obj-y		:= process.o setup.o cpu.o idprom.o \
-		   traps.o devices.o auxio.o \
+		   traps.o devices.o auxio.o una_asm.o \
 		   irq.o ptrace.o time.o sys_sparc.o signal.o \
 		   unaligned.o central.o pci.o starfire.o semaphore.o \
 		   power.o sbus.o iommu_common.o sparc64_ksyms.o chmc.o

arch/sparc64/kernel/traps.c

@@ -2127,6 +2127,9 @@ void __init trap_init(void)
 	    TI_PRE_COUNT != offsetof(struct thread_info, preempt_count) ||
 	    TI_NEW_CHILD != offsetof(struct thread_info, new_child) ||
 	    TI_SYS_NOERROR != offsetof(struct thread_info, syscall_noerror) ||
+	    TI_RESTART_BLOCK != offsetof(struct thread_info, restart_block) ||
+	    TI_KUNA_REGS != offsetof(struct thread_info, kern_una_regs) ||
+	    TI_KUNA_INSN != offsetof(struct thread_info, kern_una_insn) ||
 	    TI_FPREGS != offsetof(struct thread_info, fpregs) ||
 	    (TI_FPREGS & (64 - 1)))
 		thread_info_offsets_are_bolixed_dave();

arch/sparc64/kernel/una_asm.S

@@ -0,0 +1,153 @@
+/* una_asm.S: Kernel unaligned trap assembler helpers.
+ *
+ * Copyright (C) 1996,2005 David S. Miller (davem@davemloft.net)
+ * Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
+ */
+
+	.text
+
+kernel_unaligned_trap_fault:
+	call	kernel_mna_trap_fault
+	 nop
+	retl
+	 nop
+	.size	kern_unaligned_trap_fault, .-kern_unaligned_trap_fault
+
+	.globl	__do_int_store
+__do_int_store:
+	rd	%asi, %o4
+	wr	%o3, 0, %asi
+	ldx	[%o2], %g3
+	cmp	%o1, 2
+	be,pn	%icc, 2f
+	 cmp	%o1, 4
+	be,pt	%icc, 1f
+	 srlx	%g3, 24, %g2
+	srlx	%g3, 56, %g1
+	srlx	%g3, 48, %g7
+4:	stba	%g1, [%o0] %asi
+	srlx	%g3, 40, %g1
+5:	stba	%g7, [%o0 + 1] %asi
+	srlx	%g3, 32, %g7
+6:	stba	%g1, [%o0 + 2] %asi
+7:	stba	%g7, [%o0 + 3] %asi
+	srlx	%g3, 16, %g1
+8:	stba	%g2, [%o0 + 4] %asi
+	srlx	%g3, 8, %g7
+9:	stba	%g1, [%o0 + 5] %asi
+10:	stba	%g7, [%o0 + 6] %asi
+	ba,pt	%xcc, 0f
+11:	 stba	%g3, [%o0 + 7] %asi
+1:	srl	%g3, 16, %g7
+12:	stba	%g2, [%o0] %asi
+	srl	%g3, 8, %g2
+13:	stba	%g7, [%o0 + 1] %asi
+14:	stba	%g2, [%o0 + 2] %asi
+	ba,pt	%xcc, 0f
+15:	 stba	%g3, [%o0 + 3] %asi
+2:	srl	%g3, 8, %g2
+16:	stba	%g2, [%o0] %asi
+17:	stba	%g3, [%o0 + 1] %asi
+0:
+	wr	%o4, 0x0, %asi
+	retl
+	 nop
+	.size	__do_int_store, .-__do_int_store
+
+	.section	__ex_table
+	.word		4b, kernel_unaligned_trap_fault
+	.word		5b, kernel_unaligned_trap_fault
+	.word		6b, kernel_unaligned_trap_fault
+	.word		7b, kernel_unaligned_trap_fault
+	.word		8b, kernel_unaligned_trap_fault
+	.word		9b, kernel_unaligned_trap_fault
+	.word		10b, kernel_unaligned_trap_fault
+	.word		11b, kernel_unaligned_trap_fault
+	.word		12b, kernel_unaligned_trap_fault
+	.word		13b, kernel_unaligned_trap_fault
+	.word		14b, kernel_unaligned_trap_fault
+	.word		15b, kernel_unaligned_trap_fault
+	.word		16b, kernel_unaligned_trap_fault
+	.word		17b, kernel_unaligned_trap_fault
+	.previous
+
+	.globl	do_int_load
+do_int_load:
+	rd	%asi, %o5
+	wr	%o4, 0, %asi
+	cmp	%o1, 8
+	bge,pn	%icc, 9f
+	 cmp	%o1, 4
+	be,pt	%icc, 6f
+4:	 lduba	[%o2] %asi, %g2
+5:	lduba	[%o2 + 1] %asi, %g3
+	sll	%g2, 8, %g2
+	brz,pt	%o3, 3f
+	 add	%g2, %g3, %g2
+	sllx	%g2, 48, %g2
+	srax	%g2, 48, %g2
+3:	ba,pt	%xcc, 0f
+	 stx	%g2, [%o0]
+6:	lduba	[%o2 + 1] %asi, %g3
+	sll	%g2, 24, %g2
+7:	lduba	[%o2 + 2] %asi, %g7
+	sll	%g3, 16, %g3
+8:	lduba	[%o2 + 3] %asi, %g1
+	sll	%g7, 8, %g7
+	or	%g2, %g3, %g2
+	or	%g7, %g1, %g7
+	or	%g2, %g7, %g2
+	brnz,a,pt %o3, 3f
+	 sra	%g2, 0, %g2
+3:	ba,pt	%xcc, 0f
+	 stx	%g2, [%o0]
+9:	lduba	[%o2] %asi, %g2
+10:	lduba	[%o2 + 1] %asi, %g3
+	sllx	%g2, 56, %g2
+11:	lduba	[%o2 + 2] %asi, %g7
+	sllx	%g3, 48, %g3
+12:	lduba	[%o2 + 3] %asi, %g1
+	sllx	%g7, 40, %g7
+	sllx	%g1, 32, %g1
+	or	%g2, %g3, %g2
+	or	%g7, %g1, %g7
+13:	lduba	[%o2 + 4] %asi, %g3
+	or	%g2, %g7, %g7
+14:	lduba	[%o2 + 5] %asi, %g1
+	sllx	%g3, 24, %g3
+15:	lduba	[%o2 + 6] %asi, %g2
+	sllx	%g1, 16, %g1
+	or	%g7, %g3, %g7
+16:	lduba	[%o2 + 7] %asi, %g3
+	sllx	%g2, 8, %g2
+	or	%g7, %g1, %g7
+	or	%g2, %g3, %g2
+	or	%g7, %g2, %g7
+	cmp	%o1, 8
+	be,a,pt %icc, 0f
+	 stx	%g7, [%o0]
+	srlx	%g7, 32, %g2
+	sra	%g7, 0, %g7
+	stx	%g2, [%o0]
+	stx	%g7, [%o0 + 8]
+0:
+	wr	%o5, 0x0, %asi
+	retl
+	 nop
+	.size	__do_int_load, .-__do_int_load
+
+	.section	__ex_table
+	.word		4b, kernel_unaligned_trap_fault
+	.word		5b, kernel_unaligned_trap_fault
+	.word		6b, kernel_unaligned_trap_fault
+	.word		7b, kernel_unaligned_trap_fault
+	.word		8b, kernel_unaligned_trap_fault
+	.word		9b, kernel_unaligned_trap_fault
+	.word		10b, kernel_unaligned_trap_fault
+	.word		11b, kernel_unaligned_trap_fault
+	.word		12b, kernel_unaligned_trap_fault
+	.word		13b, kernel_unaligned_trap_fault
+	.word		14b, kernel_unaligned_trap_fault
+	.word		15b, kernel_unaligned_trap_fault
+	.word		16b, kernel_unaligned_trap_fault
+	.previous