Martin Schwidefsky 2c72a44ecd s390/spinlock: add compare-and-delay to lock wait loops ... Add the compare-and-delay instruction to the spin-lock and rw-lock retry loops. A CPU executing the compare-and-delay instruction stops until the lock value has changed. This is done to make the locking code for contended locks to behave better in regard to the multi- hreading facility. A thread of a core executing a compare-and-delay will allow the other threads of a core to get a larger share of the core resources. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>		2015-01-23 15:17:04 +01:00
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asm	s390/spinlock: add compare-and-delay to lock wait loops	2015-01-23 15:17:04 +01:00
uapi/asm	s390: wire up execveat syscall	2014-12-18 13:37:17 +01:00