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(parent: 1c182a6) | patch
s390: optimize control register update
authorMartin Schwidefsky <schwidefsky@de.ibm.com>
Tue, 3 Dec 2013 13:57:18 +0000 (14:57 +0100)
committerMartin Schwidefsky <schwidefsky@de.ibm.com>
Mon, 16 Dec 2013 13:37:45 +0000 (14:37 +0100)
commitc63badebfebacdba827ab1cc1d420fc81bd8d818
tree6bc09659dd889c7d85b09e7d1283cfecf08859a8tree | snapshot
parent1c182a628075af7431edb8155601740867b5ae51commit | diff
s390: optimize control register update

It is less expensive to update control registers 0 and 2 with two
individual stctg/lctlg instructions as with a single one that spans
control register 0, 1 and 2.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
arch/s390/kernel/ptrace.c diff | blob | blame | history
Mirror https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git