tree 5b8fd3880f3b38575b1a043f3f4f07623a633bd1
parent beef560b4cdfafb2211a856e1d722540f5151933
author Martin Schwidefsky <schwidefsky@de.ibm.com> 1397559307 +0200
committer Martin Schwidefsky <schwidefsky@de.ibm.com> 1400569127 +0200

s390: split TIF bits into CIF, PIF and TIF bits

The oi and ni instructions used in entry[64].S to set and clear bits
in the thread-flags are not guaranteed to be atomic in regard to other
CPUs. Split the TIF bits into CPU, pt_regs and thread-info specific
bits. Updates on the TIF bits are done with atomic instructions,
updates on CPU and pt_regs bits are done with non-atomic instructions.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>