diff options
Diffstat (limited to 'arch/s390/kernel/irq.c')
| -rw-r--r-- | arch/s390/kernel/irq.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/arch/s390/kernel/irq.c b/arch/s390/kernel/irq.c index 6eba6fd8a8ec..8ac2097f13d4 100644 --- a/arch/s390/kernel/irq.c +++ b/arch/s390/kernel/irq.c @@ -196,7 +196,7 @@ asmlinkage void do_softirq(void) * ext_int_hash[index] is the list head for all external interrupts that hash * to this index. */ -static struct hlist_head ext_int_hash[256]; +static struct hlist_head ext_int_hash[32] ____cacheline_aligned; struct ext_int_info { ext_int_handler_t handler; @@ -210,7 +210,9 @@ static DEFINE_SPINLOCK(ext_int_hash_lock); static inline int ext_hash(u16 code) { - return (code + (code >> 9)) & 0xff; + BUILD_BUG_ON(!is_power_of_2(ARRAY_SIZE(ext_int_hash))); + + return (code + (code >> 9)) & (ARRAY_SIZE(ext_int_hash) - 1); } int register_external_interrupt(u16 code, ext_int_handler_t handler) |