Re: kfree(NULL)

From: Pekka Enberg
Date: Sat Apr 22 2006 - 14:37:25 EST


On Sat, 2006-04-22 at 18:48 +1000, Paul Mackerras wrote:
> There is a judgement to be made at each call site of kfree (and
> similar functions) about whether the argument is rarely NULL, or could
> often be NULL. If the janitors have been making this judgement, I
> apologise, but I haven't seen them doing that.

I don't think anyone should be calling kfree with NULL pointer often in
the first place. Keeping the extra check in place is masking the real
problem. So yeah, we should be looking at the NULL checks more carefully
to see if they require more fundamental fixes, but no, I don't see why
janitors can't continue to remove the extra checks.

Pekka

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