gistfile1.c

static inline int disable_interrupts(void)
{
    int r;
    __asm__ __volatile__(
        "pushfd;"
        "cli;"
        "pop %0;"
        : "=mr"(r)
    );

    return r;
}

static inline void restore_interrupts(int r)
{
    __asm__ __volatile__ ("push %0; popfd;" :: "mr"(r));
}