xtensa: drop unused fast_io_protect function

fast_io_protect is not used anywhere, drop its definition.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>

1 files changed, 0 insertions, 24 deletions

diff --git a/arch/xtensa/kernel/coprocessor.S b/arch/xtensa/kernel/coprocessor.S
index 6911e384f608..3a98503ad11a 100644
--- a/arch/xtensa/kernel/coprocessor.S
+++ b/arch/xtensa/kernel/coprocessor.S
@@ -26,30 +26,6 @@
 #include <asm/signal.h>
 #include <asm/tlbflush.h>
 
-/*
- * Entry condition:
- *
- *   a0:        trashed, original value saved on stack (PT_AREG0)
- *   a1:        a1
- *   a2:        new stack pointer, original in DEPC
- *   a3:        a3
- *   depc:      a2, original value saved on stack (PT_DEPC)
- *   excsave_1: dispatch table
- *
- *   PT_DEPC >= VALID_DOUBLE_EXCEPTION_ADDRESS: double exception, DEPC
- *           <  VALID_DOUBLE_EXCEPTION_ADDRESS: regular exception
- */
-
-/* IO protection is currently unsupported. */
-
-ENTRY(fast_io_protect)
-
-        wsr     a0, excsave1
-        movi    a0, unrecoverable_exception
-        callx0  a0
-
-ENDPROC(fast_io_protect)
-
 #if XTENSA_HAVE_COPROCESSORS
 
 /*