[SPARC64]: Correctable ECC errors cannot occur at trap level > 0.

The are distrupting, which by the sparc v9 definition means they
can only occur when interrupts are enabled in the %pstate register.
This never occurs in any of the trap handling code running at
trap levels > 0.

So just mark it as an unexpected trap.

This allows us to kill off the cee_stuff member of struct thread_info.

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

arch/sparc64/kernel/traps.c

@@ -2169,7 +2169,6 @@ void __init trap_init(void)
 	    TI_KERN_CNTD0 != offsetof(struct thread_info, kernel_cntd0) ||
 	    TI_KERN_CNTD1 != offsetof(struct thread_info, kernel_cntd1) ||
 	    TI_PCR != offsetof(struct thread_info, pcr_reg) ||
-	    TI_CEE_STUFF != offsetof(struct thread_info, cee_stuff) ||
 	    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) ||

arch/sparc64/kernel/ttable.S

@@ -222,23 +222,7 @@ tl1_resv05c:	BTRAPTL1(0x5c) BTRAPTL1(0x5d) BTRAPTL1(0x5e) BTRAPTL1(0x5f)
 tl1_ivec:	TRAP_IVEC
 tl1_paw:	TRAPTL1(do_paw_tl1)
 tl1_vaw:	TRAPTL1(do_vaw_tl1)
-
-		/* The grotty trick to save %g1 into current->thread.cee_stuff
-		 * is because when we take this trap we could be interrupting
-		 * trap code already using the trap alternate global registers.
-		 *
-		 * We cross our fingers and pray that this store/load does
-		 * not cause yet another CEE trap.
-		 */
-tl1_cee:	membar	#Sync
-		stx	%g1, [%g6 + TI_CEE_STUFF]
-		ldxa	[%g0] ASI_AFSR, %g1
-		membar	#Sync
-		stxa	%g1, [%g0] ASI_AFSR
-		membar	#Sync
-		ldx	[%g6 + TI_CEE_STUFF], %g1
-		retry
-
+tl1_cee:	BTRAPTL1(0x63)
 tl1_iamiss:	BTRAPTL1(0x64) BTRAPTL1(0x65) BTRAPTL1(0x66) BTRAPTL1(0x67)
 tl1_damiss:
 #include	"dtlb_miss.S"

include/asm-sparc64/thread_info.h

@@ -64,8 +64,6 @@ struct thread_info {
 	__u64			kernel_cntd0, kernel_cntd1;
 	__u64			pcr_reg;
 
-	__u64			cee_stuff;
-
 	struct restart_block	restart_block;
 
 	struct pt_regs		*kern_una_regs;
@@ -104,10 +102,9 @@ struct thread_info {
 #define TI_KERN_CNTD0	0x00000480
 #define TI_KERN_CNTD1	0x00000488
 #define TI_PCR		0x00000490
-#define TI_CEE_STUFF	0x00000498
-#define TI_RESTART_BLOCK 0x000004a0
-#define TI_KUNA_REGS	0x000004c8
-#define TI_KUNA_INSN	0x000004d0
+#define TI_RESTART_BLOCK 0x00000498
+#define TI_KUNA_REGS	0x000004c0
+#define TI_KUNA_INSN	0x000004c8
 #define TI_FPREGS	0x00000500
 
 /* We embed this in the uppermost byte of thread_info->flags */