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| author | Richard Kennedy <richard@rsk.demon.co.uk> | 2008-11-23 14:34:43 (GMT) |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-11-23 15:15:00 (GMT) |
| commit | e262a7ba31f0cd4dae225e6d2e9037e5ac6108e8 (patch) | |
| tree | 338d892cf8d120341fa206ad8ed6350eb5bedd79 | |
| parent | ed313489badef16d700f5a3be50e8fd8f8294bc8 (diff) | |
| download | linux-e262a7ba31f0cd4dae225e6d2e9037e5ac6108e8.tar.xz | |
irq.h: remove padding from irq_desc on 64bits
Impact: reduce struct irq_desc size
struct irq_desc: reorder to remove padding on 64bits
shrinks irq_desc to 128 bytes which saves data space & cache lines
On a generic x86_64/SMP build this reduces the reported data size by
64k.
Signed-off-by: Richard Kennedy <richard@rsk.demon.co.uk>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| -rw-r--r-- | include/linux/irq.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/include/linux/irq.h b/include/linux/irq.h index d058c57..838a977 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -142,8 +142,8 @@ struct irq_chip { * @depth: disable-depth, for nested irq_disable() calls * @wake_depth: enable depth, for multiple set_irq_wake() callers * @irq_count: stats field to detect stalled irqs - * @irqs_unhandled: stats field for spurious unhandled interrupts * @last_unhandled: aging timer for unhandled count + * @irqs_unhandled: stats field for spurious unhandled interrupts * @lock: locking for SMP * @affinity: IRQ affinity on SMP * @cpu: cpu index useful for balancing @@ -165,8 +165,8 @@ struct irq_desc { unsigned int depth; /* nested irq disables */ unsigned int wake_depth; /* nested wake enables */ unsigned int irq_count; /* For detecting broken IRQs */ - unsigned int irqs_unhandled; unsigned long last_unhandled; /* Aging timer for unhandled count */ + unsigned int irqs_unhandled; spinlock_t lock; #ifdef CONFIG_SMP cpumask_t affinity; |