Messages in this thread | | | Date | Thu, 3 Aug 2017 14:45:55 -0700 | From | Andrew Morton <> | Subject | Re: [PATCH v2] bitops: Avoid integer overflow in GENMASK(_ULL) |
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On Thu, 3 Aug 2017 14:20:20 -0700 Matthias Kaehlcke <mka@chromium.org> wrote:
> GENMASK(_ULL) performs a left-shift of ~0UL(L), which technically > results in an integer overflow. clang raises a warning if the overflow > occurs in a preprocessor expression.
That's just irritaing.
> Clear the low-order bits through > a substraction instead of the left-shift to avoid the overflow.
There's no change in .text size for a few files I tested so guess we can live with it.
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