[RFC PATCH 11/21] crypto: deflate - drop obsolete 'comp' implementation

[Ard Biesheuvel]

No users of the obsolete 'comp' crypto compression API remain, so let's
drop the software deflate version of it.

Signed-off-by: Ard Biesheuvel <a...@kernel.org>
---
 crypto/deflate.c | 58 +-------------------
 1 file changed, 1 insertion(+), 57 deletions(-)

diff --git a/crypto/deflate.c b/crypto/deflate.c
index f4f127078fe2a5aa..0955040ca9e64146 100644
--- a/crypto/deflate.c
+++ b/crypto/deflate.c
@@ -130,13 +130,6 @@ static void *deflate_alloc_ctx(struct crypto_scomp *tfm)
        return ctx;
 }
 
-static int deflate_init(struct crypto_tfm *tfm)
-{
-       struct deflate_ctx *ctx = crypto_tfm_ctx(tfm);
-
-       return __deflate_init(ctx);
-}
-
 static void __deflate_exit(void *ctx)
 {
        deflate_comp_exit(ctx);
@@ -149,13 +142,6 @@ static void deflate_free_ctx(struct crypto_scomp *tfm, 
void *ctx)
        kfree_sensitive(ctx);
 }
 
-static void deflate_exit(struct crypto_tfm *tfm)
-{
-       struct deflate_ctx *ctx = crypto_tfm_ctx(tfm);
-
-       __deflate_exit(ctx);
-}
-
 static int __deflate_compress(const u8 *src, unsigned int slen,
                              u8 *dst, unsigned int *dlen, void *ctx)
 {
@@ -185,14 +171,6 @@ static int __deflate_compress(const u8 *src, unsigned int 
slen,
        return ret;
 }
 
-static int deflate_compress(struct crypto_tfm *tfm, const u8 *src,
-                           unsigned int slen, u8 *dst, unsigned int *dlen)
-{
-       struct deflate_ctx *dctx = crypto_tfm_ctx(tfm);
-
-       return __deflate_compress(src, slen, dst, dlen, dctx);
-}
-
 static int deflate_scompress(struct crypto_scomp *tfm, const u8 *src,
                             unsigned int slen, u8 *dst, unsigned int *dlen,
                             void *ctx)
@@ -241,14 +219,6 @@ static int __deflate_decompress(const u8 *src, unsigned 
int slen,
        return ret;
 }
 
-static int deflate_decompress(struct crypto_tfm *tfm, const u8 *src,
-                             unsigned int slen, u8 *dst, unsigned int *dlen)
-{
-       struct deflate_ctx *dctx = crypto_tfm_ctx(tfm);
-
-       return __deflate_decompress(src, slen, dst, dlen, dctx);
-}
-
 static int deflate_sdecompress(struct crypto_scomp *tfm, const u8 *src,
                               unsigned int slen, u8 *dst, unsigned int *dlen,
                               void *ctx)
@@ -256,19 +226,6 @@ static int deflate_sdecompress(struct crypto_scomp *tfm, 
const u8 *src,
        return __deflate_decompress(src, slen, dst, dlen, ctx);
 }
 
-static struct crypto_alg alg = {
-       .cra_name               = "deflate",
-       .cra_driver_name        = "deflate-generic",
-       .cra_flags              = CRYPTO_ALG_TYPE_COMPRESS,
-       .cra_ctxsize            = sizeof(struct deflate_ctx),
-       .cra_module             = THIS_MODULE,
-       .cra_init               = deflate_init,
-       .cra_exit               = deflate_exit,
-       .cra_u                  = { .compress = {
-       .coa_compress           = deflate_compress,
-       .coa_decompress         = deflate_decompress } }
-};
-
 static struct scomp_alg scomp = {
        .alloc_ctx              = deflate_alloc_ctx,
        .free_ctx               = deflate_free_ctx,
@@ -283,24 +240,11 @@ static struct scomp_alg scomp = {
 
 static int __init deflate_mod_init(void)
 {
-       int ret;
-
-       ret = crypto_register_alg(&alg);
-       if (ret)
-               return ret;
-
-       ret = crypto_register_scomp(&scomp);
-       if (ret) {
-               crypto_unregister_alg(&alg);
-               return ret;
-       }
-
-       return ret;
+       return crypto_register_scomp(&scomp);
 }
 
 static void __exit deflate_mod_fini(void)
 {
-       crypto_unregister_alg(&alg);
        crypto_unregister_scomp(&scomp);
 }
 
-- 
2.39.2