Revert "crypto: rsa-pkcs1pad - Replace GFP_ATOMIC with GFP_KERNEL in...

Revert "crypto: rsa-pkcs1pad - Replace GFP_ATOMIC with GFP_KERNEL in pkcs1pad_encrypt_sign_complete"

This reverts commit 1ca28098.

While the akcipher API as a whole is designed to be called only
from thread context, its completion path is still called from
softirq context as usual.  Therefore we must not use GFP_KERNEL
on that path.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto/rsa-pkcs1pad.c

@@ -190,7 +190,7 @@ static int pkcs1pad_encrypt_sign_complete(struct akcipher_request *req, int err)
 	if (likely(!pad_len))
 		goto out;
 
-	out_buf = kzalloc(ctx->key_size, GFP_KERNEL);
+	out_buf = kzalloc(ctx->key_size, GFP_ATOMIC);
 	err = -ENOMEM;
 	if (!out_buf)
 		goto out;