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xtensa: don't touch EXC_TABLE_FIXUP in _switch_to

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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>
This commit is contained in:
Max Filippov
2015-07-17 05:24:49 +03:00
parent 77d6273e79
commit 98e298329e
1 changed files with 0 additions and 4 deletions
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arch/xtensa/kernel/entry.S
-4
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@@ -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' */