boolean result from a test for a bit

["Allan, Bruce W" <bruce.w.allan@xxxxxxxxx>]

For a simple boolean test of whether, for example, bit 5 is set in the variable 'flags', which of the following methods is preferred over the other?

bool result = (flags & (1 << 5)) ? true : false;

or

bool result = !!(flags & (1 << 5));

I've seen examples of both in the Linux kernel.

Thanks,
Bruce.
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