Isaku Yamahata wrote:
> define sync bitops which is necessary for ia64/xen.
>
> Signed-off-by: Isaku Yamahata <yamahata@xxxxxxxxxxxxx>
> ---
> include/asm-ia64/sync_bitops.h | 59 ++++++++++++++++++++++++++++++++++++++++
> 1 files changed, 59 insertions(+), 0 deletions(-)
> create mode 100644 include/asm-ia64/sync_bitops.h
>
> diff --git a/include/asm-ia64/sync_bitops.h b/include/asm-ia64/sync_bitops.h
> new file mode 100644
> index 0000000..f56cd90
> --- /dev/null
> +++ b/include/asm-ia64/sync_bitops.h
> @@ -0,0 +1,59 @@
> +#ifndef _ASM_IA64_SYNC_BITOPS_H
> +#define _ASM_IA64_SYNC_BITOPS_H
> +
> +/*
> + * Copyright 1992, Linus Torvalds.
> + * Heavily modified to provide guaranteed strong synchronisation
> + * when communicating with Xen or other guest OSes running on other CPUs.
> + */
> +
> +static inline void sync_set_bit(int nr, volatile void *addr)
> +{
> + set_bit(nr, addr);
> +}
> +
> +static inline void sync_clear_bit(int nr, volatile void *addr)
> +{
> + clear_bit(nr, addr);
> +}
> +
> +static inline void sync_change_bit(int nr, volatile void *addr)
> +{
> + change_bit(nr, addr);
> +}
> +
> +static inline int sync_test_and_set_bit(int nr, volatile void *addr)
> +{
> + return test_and_set_bit(nr, addr);
> +}
> +
> +static inline int sync_test_and_clear_bit(int nr, volatile void *addr)
> +{
> + return test_and_clear_bit(nr, addr);
> +}
> +
> +static inline int sync_test_and_change_bit(int nr, volatile void *addr)
> +{
> + return test_and_change_bit(nr, addr);
> +}
> +
> +static inline int sync_const_test_bit(int nr, const volatile void *addr)
> +{
> + return test_bit(nr, addr);
> +}
> +
> +static inline int sync_var_test_bit(int nr, volatile void *addr)
> +{
> + return test_bit(nr, addr);
> +}
> +
> +#define sync_cmpxchg ia64_cmpxchg4_acq
>
Please always use arguments with function-like macros, to prevent
accidental namespace clashes.
> +
> +#define sync_test_bit(nr,addr) \
> + (__builtin_constant_p(nr) ? \
> + sync_const_test_bit((nr), (addr)) : \
> + sync_var_test_bit((nr), (addr)))
> +
> +#define sync_cmpxchg_subword sync_cmpxchg
>
Ditto.
J
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