[RFC PATCH 12/21] crypto: lz4 - drop obsolete 'comp' implementation

[Ard Biesheuvel]

The 'comp' API is obsolete and will be removed, so remove this comp
implementation.

Signed-off-by: Ard Biesheuvel <a...@kernel.org>
---
 crypto/lz4.c | 61 +-------------------
 1 file changed, 1 insertion(+), 60 deletions(-)

diff --git a/crypto/lz4.c b/crypto/lz4.c
index 0606f8862e7872ad..c46b6cbd91ce10c0 100644
--- a/crypto/lz4.c
+++ b/crypto/lz4.c
@@ -27,29 +27,11 @@ static void *lz4_alloc_ctx(struct crypto_scomp *tfm)
        return ctx;
 }
 
-static int lz4_init(struct crypto_tfm *tfm)
-{
-       struct lz4_ctx *ctx = crypto_tfm_ctx(tfm);
-
-       ctx->lz4_comp_mem = lz4_alloc_ctx(NULL);
-       if (IS_ERR(ctx->lz4_comp_mem))
-               return -ENOMEM;
-
-       return 0;
-}
-
 static void lz4_free_ctx(struct crypto_scomp *tfm, void *ctx)
 {
        vfree(ctx);
 }
 
-static void lz4_exit(struct crypto_tfm *tfm)
-{
-       struct lz4_ctx *ctx = crypto_tfm_ctx(tfm);
-
-       lz4_free_ctx(NULL, ctx->lz4_comp_mem);
-}
-
 static int __lz4_compress_crypto(const u8 *src, unsigned int slen,
                                 u8 *dst, unsigned int *dlen, void *ctx)
 {
@@ -70,14 +52,6 @@ static int lz4_scompress(struct crypto_scomp *tfm, const u8 
*src,
        return __lz4_compress_crypto(src, slen, dst, dlen, ctx);
 }
 
-static int lz4_compress_crypto(struct crypto_tfm *tfm, const u8 *src,
-                              unsigned int slen, u8 *dst, unsigned int *dlen)
-{
-       struct lz4_ctx *ctx = crypto_tfm_ctx(tfm);
-
-       return __lz4_compress_crypto(src, slen, dst, dlen, ctx->lz4_comp_mem);
-}
-
 static int __lz4_decompress_crypto(const u8 *src, unsigned int slen,
                                   u8 *dst, unsigned int *dlen, void *ctx)
 {
@@ -97,26 +71,6 @@ static int lz4_sdecompress(struct crypto_scomp *tfm, const 
u8 *src,
        return __lz4_decompress_crypto(src, slen, dst, dlen, NULL);
 }
 
-static int lz4_decompress_crypto(struct crypto_tfm *tfm, const u8 *src,
-                                unsigned int slen, u8 *dst,
-                                unsigned int *dlen)
-{
-       return __lz4_decompress_crypto(src, slen, dst, dlen, NULL);
-}
-
-static struct crypto_alg alg_lz4 = {
-       .cra_name               = "lz4",
-       .cra_driver_name        = "lz4-generic",
-       .cra_flags              = CRYPTO_ALG_TYPE_COMPRESS,
-       .cra_ctxsize            = sizeof(struct lz4_ctx),
-       .cra_module             = THIS_MODULE,
-       .cra_init               = lz4_init,
-       .cra_exit               = lz4_exit,
-       .cra_u                  = { .compress = {
-       .coa_compress           = lz4_compress_crypto,
-       .coa_decompress         = lz4_decompress_crypto } }
-};
-
 static struct scomp_alg scomp = {
        .alloc_ctx              = lz4_alloc_ctx,
        .free_ctx               = lz4_free_ctx,
@@ -131,24 +85,11 @@ static struct scomp_alg scomp = {
 
 static int __init lz4_mod_init(void)
 {
-       int ret;
-
-       ret = crypto_register_alg(&alg_lz4);
-       if (ret)
-               return ret;
-
-       ret = crypto_register_scomp(&scomp);
-       if (ret) {
-               crypto_unregister_alg(&alg_lz4);
-               return ret;
-       }
-
-       return ret;
+       return crypto_register_scomp(&scomp);
 }
 
 static void __exit lz4_mod_fini(void)
 {
-       crypto_unregister_alg(&alg_lz4);
        crypto_unregister_scomp(&scomp);
 }
 
-- 
2.39.2