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authorPhilipp Hachtmann <phacht@linux.vnet.ibm.com>2014-04-07 18:25:23 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2014-05-20 08:58:42 +0200
commit6c8cd5bbda7e6be166cf2e2dd4be5890193e17ac (patch)
tree0245d1a206b04c2cd2b5b4914dfb696205673861 /arch/s390/kernel/setup.c
parent5b3f683e694a835f5dfdab06102be1a50604c3b7 (diff)
s390/spinlock: optimize spinlock code sequence
Use lowcore constant to improve the code generated for spinlocks. [ Martin Schwidefsky: patch breakdown and code beautification ] Signed-off-by: Philipp Hachtmann <phacht@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/kernel/setup.c')
-rw-r--r--arch/s390/kernel/setup.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index 1f5536c2fd02..7c5b05fa2194 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -373,6 +373,10 @@ static void __init setup_lowcore(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);
+#endif
+
set_prefix((u32)(unsigned long) lc);
lowcore_ptr[0] = lc;
}