static char *buf; (was Re: +v4l-fix-concurrent-read-from-proc-videocodecs.patch added to -mmtree)

[Alexey Dobriyan]

> -static char *videocodec_buf = NULL;
> -static int videocodec_bufsize;

> -	kfree(videocodec_buf);
> -	videocodec_buf = kmalloc(size, GFP_KERNEL);

Speaking of this failure mode... cfi_staa_writev() does the same trick
allocating and freeing global pointer to data.
Is this a bug too?

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