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SubjectRe: [PATCH] make crypto modular
Zbigniew Szmek wrote:
> Cryptoapi can be modular, so why not?
> This patch does the following:
> 1. Change Kconfig option CRYPTO to tristate
> 2. Add __exit functions to crypto/api.c and crypto/proc.c
> 3. Change crypto/api.c:init_crypto() from void to int
> 4. Change crypto/Makefile to link hmac.o as part
> of the new crypto.ko module.
>
> hmac.c could be compiled as a seperate module, if not for the fact,
> that sizeof(struct digest_tfm) depends on CONFIG_CRYPTO_HMAC.
> Linking them together ensures that there is no mismatch. If the user
> compiles crypto.ko without HMAC, and then compiles another module
> with HMAC, (for example ah4.ko), it will correctly fail with
> "ah4: Unknown symbol crypto_hmac_init".
>
> When CONFIG_CRYPTO=y the code generated should be identical,
> apart from point 3. above. When CONFIG_CRYPTO=m
> size of crypto/crypto.ko is 15k.
>
> The patch is against 2.6.10-rc1-mm1, applies cleanly to 2.6.10-rc1 and
> to 2.6.7 with two offsets.
>
Good job! Reduces the memory cost of having the capability "just in
case" needed in small memory machines.

--
-bill davidsen (davidsen@tmr.com)
"The secret to procrastination is to put things off until the
last possible moment - but no longer" -me

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