RE: [PATCH] locking/rwsem: Fix kernel crash when spinning on RWSEM_OWNER_UNKNOWN

[David Laight]

From: Waiman Long
> Sent: 15 January 2020 15:48
...
> It depends. I find it hard to read an expression with "&" and "&&"
> without parentheses. Anyway, I will admit that the above code is
> inconsistent in term of how parentheses are used. So I will change that.

Conditionals containing fragments like (a == b && c == d && ...)
are much easier to read without any extra ().

The only problem with && is that when K&R added it to C they didn't
change the priority of & to be higher than == (where it should be).
At that time they could have changed all the existing code...
Modern compilers do warn about (a == b & c).

	David

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