[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>

3 files changed, 4 insertions, 24 deletions

diff --git a/arch/sparc64/kernel/traps.c b/arch/sparc64/kernel/traps.c
index f47f4874253c..7e52e8972668 100644
--- a/arch/sparc64/kernel/traps.c
+++ b/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) ||
diff --git a/arch/sparc64/kernel/ttable.S b/arch/sparc64/kernel/ttable.S
index 2fb7a33993c0..99531424c598 100644
--- a/arch/sparc64/kernel/ttable.S
+++ b/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"
diff --git a/include/asm-sparc64/thread_info.h b/include/asm-sparc64/thread_info.h
index ac9d068aab4f..2ebf7f27bf91 100644
--- a/include/asm-sparc64/thread_info.h
+++ b/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 */