xtensa: don't touch EXC_TABLE_FIXUP in _switch_to

There's no way _switch_to can produce double exceptions now, don't
enter/leave EXC_TABLE_FIXUP critical section.

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

diff --git a/arch/xtensa/kernel/entry.S b/arch/xtensa/kernel/entry.S
index 3d9d221..5703bc1 100644 (file)
--- a/arch/xtensa/kernel/entry.S
+++ b/arch/xtensa/kernel/entry.S
@@ -1868,9 +1868,7 @@ ENTRY(_switch_to)
        /* Disable ints while we manipulate the stack pointer. */
 
        rsil    a14, LOCKLEVEL
-       rsr     a3, excsave1
        rsync
-       s32i    a3, a3, EXC_TABLE_FIXUP /* enter critical section */
 
        /* Switch CPENABLE */
 
@@ -1891,9 +1889,7 @@ ENTRY(_switch_to)
         */
 
        rsr     a3, excsave1            # exc_table
-       movi    a6, 0
        addi    a7, a5, PT_REGS_OFFSET
-       s32i    a6, a3, EXC_TABLE_FIXUP
        s32i    a7, a3, EXC_TABLE_KSTK
 
        /* restore context of the task 'next' */