RE: Why is the kfree() argument const?

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To: David Schwartz <davids@...>
Cc: Johannes Weiner <hannes@...>, Linux Kernel Mailing List <linux-kernel@...>, <clameter@...>, <penberg@...>
Date: Thursday, January 17, 2008 - 7:10 pm

On Thu, 17 Jan 2008, David Schwartz wrote:

Blah. That's just your own made-up explanation of what you think "const"
should mean. It has no logical background or any basis in the C language.

"const" has nothing to do with "logical state".  It has one meaning, and 
one meaning only: the compiler should complain if that particular type is 
used to do a write access.

It says nothing at all about the "logical state of the object". It cannot, 
since a single object can - and does - have multiple pointers to it.

So your standpoint not only has no relevant background to it, it's also 
not even logically consistent.

		Linus
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Messages in current thread:
RE: Why is the kfree() argument const?, Linus Torvalds, (Thu Jan 17, 5:25 pm)
Re: Why is the kfree() argument const?, Jakob Oestergaard, (Fri Jan 18, 5:48 am)
Re: Why is the kfree() argument const?, Björn, (Fri Jan 18, 9:31 am)
Re: Why is the kfree() argument const?, Jakob Oestergaard, (Fri Jan 18, 10:53 am)
Re: Why is the kfree() argument const?, Giacomo A. Catenazzi, (Fri Jan 18, 7:47 am)
Re: Why is the kfree() argument const?, Vadim Lobanov, (Fri Jan 18, 3:06 pm)
Re: Why is the kfree() argument const?, Jakob Oestergaard, (Fri Jan 18, 10:39 am)
RE: Why is the kfree() argument const?, David Schwartz, (Thu Jan 17, 6:28 pm)
RE: Why is the kfree() argument const?, Linus Torvalds, (Thu Jan 17, 7:10 pm)
RE: Why is the kfree() argument const?, David Schwartz, (Thu Jan 17, 8:56 pm)
RE: Why is the kfree() argument const?, Linus Torvalds, (Thu Jan 17, 9:15 pm)
Re: Why is the kfree() argument const?, Giacomo Catenazzi, (Fri Jan 18, 3:51 am)
Re: Why is the kfree() argument const?, Vadim Lobanov, (Fri Jan 18, 4:30 am)
Re: Why is the kfree() argument const?, Giacomo Catenazzi, (Fri Jan 18, 4:20 am)
Re: Why is the kfree() argument const?, Andy Lutomirski, (Fri Jan 18, 9:54 am)
Re: Why is the kfree() argument const?, Vadim Lobanov, (Fri Jan 18, 3:14 pm)
Re: Why is the kfree() argument const?, Zan Lynx, (Fri Jan 18, 3:31 pm)
Re: Why is the kfree() argument const?, Vadim Lobanov, (Fri Jan 18, 3:55 pm)
Re: Why is the kfree() argument const?, Andy Lutomirski, (Fri Jan 18, 9:53 am)
Re: Why is the kfree() argument const?, Olivier Galibert, (Fri Jan 18, 1:24 pm)
Re: Why is the kfree() argument const?, J.A. , (Fri Jan 18, 6:29 pm)
Re: Why is the kfree() argument const?, Krzysztof Halasa, (Fri Jan 18, 7:44 pm)
RE: Why is the kfree() argument const?, David Schwartz, (Fri Jan 18, 1:02 am)
Re: Why is the kfree() argument const?, DM, (Fri Jan 18, 2:06 pm)
Re: Why is the kfree() argument const?, Olivier Galibert, (Fri Jan 18, 1:37 pm)
RE: Why is the kfree() argument const?, Linus Torvalds, (Fri Jan 18, 12:10 pm)
RE: Why is the kfree() argument const?, David Schwartz, (Fri Jan 18, 4:55 pm)
Re: Why is the kfree() argument const?, Chris Friesen, (Fri Jan 18, 11:38 am)