diff options
Diffstat (limited to 'arch/s390/lib/spinlock.c')
| -rw-r--r-- | arch/s390/lib/spinlock.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/arch/s390/lib/spinlock.c b/arch/s390/lib/spinlock.c index ce1e4bbe53aa..81c53440b3e6 100644 --- a/arch/s390/lib/spinlock.c +++ b/arch/s390/lib/spinlock.c @@ -13,8 +13,8 @@ #include <linux/init.h> #include <linux/smp.h> #include <linux/percpu.h> +#include <linux/io.h> #include <asm/alternative.h> -#include <asm/io.h> int spin_retry = -1; @@ -26,7 +26,7 @@ static int __init spin_retry_init(void) } early_initcall(spin_retry_init); -/** +/* * spin_retry= parameter */ static int __init spin_retry_setup(char *str) @@ -75,7 +75,7 @@ static inline int arch_load_niai4(int *lock) int owner; asm_inline volatile( - ALTERNATIVE("", ".long 0xb2fa0040", 49) /* NIAI 4 */ + ALTERNATIVE("nop", ".insn rre,0xb2fa0000,4,0", 49) /* NIAI 4 */ " l %0,%1\n" : "=d" (owner) : "Q" (*lock) : "memory"); return owner; @@ -86,7 +86,7 @@ static inline int arch_cmpxchg_niai8(int *lock, int old, int new) int expected = old; asm_inline volatile( - ALTERNATIVE("", ".long 0xb2fa0080", 49) /* NIAI 8 */ + ALTERNATIVE("nop", ".insn rre,0xb2fa0000,8,0", 49) /* NIAI 8 */ " cs %0,%3,%1\n" : "=d" (old), "=Q" (*lock) : "0" (old), "d" (new), "Q" (*lock) @@ -242,7 +242,6 @@ static inline void arch_spin_lock_classic(arch_spinlock_t *lp) void arch_spin_lock_wait(arch_spinlock_t *lp) { - /* Use classic spinlocks + niai if the steal time is >= 10% */ if (test_cpu_flag(CIF_DEDICATED_CPU)) arch_spin_lock_queued(lp); else |