Re: + spin_lock_irq-enable-interrupts-while-spinning-i386-implementation.patch added to -mm tree

[Daniel Walker <dwalker@mvista.com>]

On Wed, 2007-01-03 at 13:12 -0800, akpm@osdl.org wrote:
> -# define __raw_spin_lock_irq(lock) __raw_spin_lock(lock)
> +
> +static inline void __raw_spin_lock_irq(raw_spinlock_t *lock)
> +{
> +       asm volatile("\n1:\t"
> +                    LOCK_PREFIX " ; decb %0\n\t"
> +                    "jns 3f\n"
> +                    STI_STRING "\n"
> +                    "2:\t"
> +                    "rep;nop\n\t"
> +                    "cmpb $0,%0\n\t"
> +                    "jle 2b\n\t"
> +                    CLI_STRING "\n"
> +                    "jmp 1b\n"
> +                    "3:\n\t"
> +                    : "+m" (lock->slock) : : "memory");
> +}
>  #endif
>   

This doesn't compile when CONFIG_PARAVIRT is enabled. It changes the
CLI_STRING and STI_STRING values.

Daniel

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