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s390: enforce CONFIG_SMP

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There never have been distributions that shiped with CONFIG_SMP=n for
s390. In addition the kernel currently doesn't even compile with
CONFIG_SMP=n for s390. Most likely it wouldn't even work, even if we
fix the compile error, since nobody tests it, since there is no use
case that I can think of.
Therefore simply enforce CONFIG_SMP and get rid of some more or
less unused code.

Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
This commit is contained in:
Heiko Carstens
2019-06-03 14:25:18 +02:00
parent 753469a23b
commit 67626fadd2
12 changed files with 7 additions and 95 deletions
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2
arch/s390/kernel/setup.c
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@@ -461,11 +461,9 @@ static void __init setup_lowcore_dat_off(void)
mem_assign_absolute(S390_lowcore.restart_source, lc->restart_source);
mem_assign_absolute(S390_lowcore.restart_psw, lc->restart_psw);
#ifdef CONFIG_SMP
lc->spinlock_lockval = arch_spin_lockval(0);
lc->spinlock_index = 0;
arch_spin_lock_setup(0);
#endif
lc->br_r1_trampoline = 0x07f1; /* br %r1 */
set_prefix((u32)(unsigned long) lc);