on stack dynamic allocations

[Kasatkin, Dmitry]

Hello,

Some places in the code uses variable-size allocation on stack..
For example from hmac_setkey():

	struct {
		struct shash_desc shash;
		char ctx[crypto_shash_descsize(hash)];
	} desc;


sparse complains

CHECK   crypto/hmac.c
crypto/hmac.c:57:47: error: bad constant expression

I like it instead of kmalloc..

But what is position of kernel community about it?

- Dmitry
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/