Commit c48e0913 authored by Heiko Carstens's avatar Heiko Carstens Committed by Martin Schwidefsky

[S390] Small barrier() and cpu_relax() cleanup.

cpu_relax() has barrier() semantics hence there is no need to use both
of them in conjunction in sclp_sync_wait(). Also change cpu_relax()
so it's more obvious that it has barrier semantics.
Signed-off-by: default avatarHeiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent 1125b464
......@@ -433,7 +433,6 @@ sclp_sync_wait(void)
get_clock() > timeout &&
del_timer(&sclp_request_timer))
sclp_request_timer.function(sclp_request_timer.data);
barrier();
cpu_relax();
}
local_irq_disable();
......
......@@ -201,8 +201,7 @@ unsigned long get_wchan(struct task_struct *p);
static inline void cpu_relax(void)
{
if (MACHINE_HAS_DIAG44)
asm volatile("diag 0,0,68" : : : "memory");
else
asm volatile("diag 0,0,68");
barrier();
}
......
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