[PATCH] crypto: allow to assign gfp_t for __crypto_alloc_tfm

On Mon, May 18, 2015 at 11:24:30PM -0700, Jaegeuk Kim wrote:

The call path in fs/ext4/crypto.c is:
 - writepage
  - ext4_encrypt
   - ext4_get_crypto_ctx
    - crypto_alloc_ablkcipher

AFAIK, this way can achieve to reduce memory footprint gracefully.
Just before submitting bios, fs allocates the required memory, and then end_io
will free them in pair.

So where does the key get generated? The crypto tfm should be
allocated when you generate the key.

Cheers,
-- 
Email: Herbert Xu [off-list ref]
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt