> +/* > + * Both reads and writes fail if the previous write didn't complete yet. This > + * macro loops a few times waiting at least long enough for one entire page > + * write to work. > + * > + * It takes two parameters: a variable in which the future timeout in jiffies > + * will be stored and a temporary variable holding the time of the last > + * iteration of processing the request. Both should be unsigned integers > + * holding at least 32 bits. > + */ > +#define loop_until_timeout(tout, op_time) \ > + for (tout = jiffies + msecs_to_jiffies(write_timeout), \ > + op_time = jiffies; \ > + time_before(op_time, tout); \ > + usleep_range(1000, 1500), op_time = jiffies) There is one subtle change coming with this change: the do-while loop is guaranteed to run at least once while the for-loop doesn't.
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