tree a23343d98f472fb1fe8a2a4c8f86d269b64945bc
parent f861e4057263033ad9134bfd6745f91b2165b351
author Heiko Carstens <heiko.carstens@de.ibm.com> 1288015818 +0200
committer Martin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com> 1288015816 +0200

[S390] switch_to: dont restore/save access & fpu regs for kernel threads

If the previous task was a kernel thread there is no need to save the
contents of the fpu and access registers since they aren't used in
kernel mode.
For the same reason it is not necessary to restore these registers if
the next task is a kernel thread.

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