Max Filippov d191323bc0 xtensa: don't use a12 in strncpy_user ...

a12 is callee-saved register in xtensa call0 ABI, so a function must not
change it. a10 is not used in this function at all, use it instead of
a12 to avoid saving/restoring it.

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

2021-10-18 22:19:34 -07:00

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