On Wed, Nov 03, 2010 at 10:59:45AM -0400, Jeremy Fitzhardinge wrote:
> Make the bulk of __ticket_spin_lock look identical for large and small
> number of cpus.
[snip]
> #if (NR_CPUS < 256)
> static __always_inline void __ticket_spin_lock(arch_spinlock_t *lock)
> {
> - register union {
> - struct __raw_tickets tickets;
> - unsigned short slock;
> - } inc = { .slock = 1 << TICKET_SHIFT };
> + register struct __raw_tickets inc = { .tail = 1 };
[snip]
> #else
> static __always_inline void __ticket_spin_lock(arch_spinlock_t *lock)
> {
> - unsigned inc = 1 << TICKET_SHIFT;
> - __ticket_t tmp;
> + register struct __raw_tickets inc = { .tickets.tail = 1 };
s/.tickets//?
Otherwise I get a compile error for NR_CPUS > 256, with just 4 patches applied.
- vatsa
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