[SPARC64]: Fix fault handling in unaligned trap handler.

We were not calling kernel_mna_trap_fault() correctly.
Instead of being fancy, just return 0 vs. -EFAULT from
the assembler stubs, and handle that return value as
appropriate.

Create an "__retl_efault" stub for assembler exception
table entries and use it where possible.

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

1 files changed, 5 insertions, 2 deletions

diff --git a/arch/sparc64/kernel/head.S b/arch/sparc64/kernel/head.S
index ecc748fb9ad7..89406f9649a9 100644
--- a/arch/sparc64/kernel/head.S
+++ b/arch/sparc64/kernel/head.S
@@ -540,8 +540,11 @@ bootup_user_stack_end:
 prom_tba:       .xword  0
 tlb_type:       .word   0       /* Must NOT end up in BSS */
         .section        ".fixup",#alloc,#execinstr
-        .globl  __ret_efault
+
+        .globl  __ret_efault, __retl_efault
 __ret_efault:
         ret
          restore %g0, -EFAULT, %o0
-
+__retl_efault:
+        retl
+         mov    -EFAULT, %o0