Messages in this thread | | | Date | Wed, 27 Nov 2013 17:01:19 +0100 | From | Peter Zijlstra <> | Subject | Re: [PATCH 08/14] sched: add latency tracing for -deadline tasks. |
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On Wed, Nov 27, 2013 at 10:56:16AM -0500, Steven Rostedt wrote: > > So from C99 standard §6.7.8 (Initialization)/21: > > > > "If there are fewer initializers in a brace-enclosed list than > > there are elements or members of an aggregate, or fewer characters > > in a string literal used to initialize an array of known size than > > there are elements in the array, the remainder of the aggregate > > shall be initialized implicitly the same as objects that have static > > storage duration." > > > > static initialization == zeroing in this case. > > > > The confusion here is that the above looks to be talking about arrays. > But it really doesn't specify structures. > > But searching the internet, it looks as though most people believe it > applies to structures, and any compiler that does otherwise will most > likely break applications. > > That is, this looks to be one of the gray areas that the compiler > writers just happen to do what's most sane. And they probably assume > it's talking about structures as well, hence the lack of warnings.
16 says initializers for aggregate or union types are brace-enclosed lists. A struct is an aggregate type.
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