tree d7fa3a8ca5b9663078f9847411d3a7a2a9c95d7a
parent a960062e5826b88e75c3999db6e5997092da519b
author Heiko Carstens <heiko.carstens@de.ibm.com> 1397029378 +0200
committer Martin Schwidefsky <schwidefsky@de.ibm.com> 1397217213 +0200

s390/uaccess: fix possible register corruption in strnlen_user_srst()

The whole point of the out-of-line strnlen_user_srst() function was to
avoid corruption of register 0 due to register asm assignment.
However 'somebody' :) forgot to remove the update_primary_asce() function
call, which may clobber register 0 contents.
So let's remove that call and also move the size check to the calling
function.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>