Re: [PATCH 2/6] iov_iter: new iov_iter_pin_pages*(), for FOLL_PIN pages

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On 2/27/22 13:57, Jens Axboe wrote:
...
+			return res;
+		return (res == n ? len : res * PAGE_SIZE) - *start;

Trying to be clever like that just makes the code a lot less readable. I
should not have to reason about a return value. Same in the other
function.


No argument there. This was shamelessly lifted from
iov_iter_get_pages(), and I initially calculated that keeping it
identical to that known-good code, where possible, was better than
fixing it up.

However, I'll go ahead and simplify it--with pleasure--based on this
feedback.


thanks,
--
John Hubbard
NVIDIA



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