On Sun, 2013-06-09 at 12:36 -0700, Paul E. McKenney wrote: > --- a/arch/x86/include/asm/spinlock_types.h > +++ b/arch/x86/include/asm/spinlock_types.h > @@ -7,12 +7,18 @@ > > #include <linux/types.h> > > -#if (CONFIG_NR_CPUS < 256) > +#if (CONFIG_NR_CPUS < 128) > typedef u8 __ticket_t; > typedef u16 __ticketpair_t; > -#else > +#define TICKET_T_CMP_GE(a, b) (UCHAR_MAX / 2 >= (unsigned char)((a) - (b))) > +#elif (CONFIG_NR_CPUS < 32768) > typedef u16 __ticket_t; > typedef u32 __ticketpair_t; > +#define TICKET_T_CMP_GE(a, b) (USHRT_MAX / 2 >= (unsigned short)((a) - (b))) > +#else > +typedef u32 __ticket_t; > +typedef u64 __ticketpair_t; > +#define TICKET_T_CMP_GE(a, b) (UINT_MAX / 2 >= (unsigned int)((a) - (b))) > #endif > > #define TICKET_SHIFT (sizeof(__ticket_t) * 8) > @@ -21,7 +27,11 @@ typedef struct arch_spinlock { > union { > __ticketpair_t head_tail; > struct __raw_tickets { > +#ifdef __BIG_ENDIAN__
Is there such a thing as a BIG_ENDIAN x86 box? This is in arch/x86/include/asm/spinlock_types.h -- Steve > + __ticket_t tail, head; > +#else /* #ifdef __BIG_ENDIAN__ */ > __ticket_t head, tail; > +#endif /* #else #ifdef __BIG_ENDIAN__ */ > } tickets; > }; > } arch_spinlock_t; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/