[RFC PATCH 10/21] crypto: 842 - drop obsolete 'comp' implementation

Ard Biesheuvel
2023-07-18T13:00:15Z

The 'comp' API is obsolete and will be removed, so remove this comp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

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
---
crypto/842.c | 63 +-------------------
1 file changed, 1 insertion(+), 62 deletions(-)

diff --git a/crypto/842.c b/crypto/842.c
index e59e54d769609ba6..5001d88cf727f74e 100644
--- a/crypto/842.c
+++ b/crypto/842.c
@@ -39,38 +39,11 @@ static void *crypto842_alloc_ctx(struct crypto_scomp *tfm)
return ctx;
}

-static int crypto842_init(struct crypto_tfm *tfm)
-{
- struct crypto842_ctx *ctx = crypto_tfm_ctx(tfm);
-
- ctx->wmem = crypto842_alloc_ctx(NULL);
- if (IS_ERR(ctx->wmem))
- return -ENOMEM;
-
- return 0;
-}
-
static void crypto842_free_ctx(struct crypto_scomp *tfm, void *ctx)
{
kfree(ctx);
}

-static void crypto842_exit(struct crypto_tfm *tfm)
-{
- struct crypto842_ctx *ctx = crypto_tfm_ctx(tfm);
-
- crypto842_free_ctx(NULL, ctx->wmem);
-}
-
-static int crypto842_compress(struct crypto_tfm *tfm,
- const u8 *src, unsigned int slen,
- u8 *dst, unsigned int *dlen)
-{
- struct crypto842_ctx *ctx = crypto_tfm_ctx(tfm);
-
- return sw842_compress(src, slen, dst, dlen, ctx->wmem);
-}
-
static int crypto842_scompress(struct crypto_scomp *tfm,
const u8 *src, unsigned int slen,
u8 *dst, unsigned int *dlen, void *ctx)
@@ -78,13 +51,6 @@ static int crypto842_scompress(struct crypto_scomp *tfm,
return sw842_compress(src, slen, dst, dlen, ctx);
}

-static int crypto842_decompress(struct crypto_tfm *tfm,
- const u8 *src, unsigned int slen,
- u8 *dst, unsigned int *dlen)
-{
- return sw842_decompress(src, slen, dst, dlen);
-}
-
static int crypto842_sdecompress(struct crypto_scomp *tfm,
const u8 *src, unsigned int slen,
u8 *dst, unsigned int *dlen, void *ctx)
@@ -92,20 +58,6 @@ static int crypto842_sdecompress(struct crypto_scomp *tfm,
return sw842_decompress(src, slen, dst, dlen);
}

-static struct crypto_alg alg = {
- .cra_name = "842",
- .cra_driver_name = "842-generic",
- .cra_priority = 100,
- .cra_flags = CRYPTO_ALG_TYPE_COMPRESS,
- .cra_ctxsize = sizeof(struct crypto842_ctx),
- .cra_module = THIS_MODULE,
- .cra_init = crypto842_init,
- .cra_exit = crypto842_exit,
- .cra_u = { .compress = {
- .coa_compress = crypto842_compress,
- .coa_decompress = crypto842_decompress } }
-};
-
static struct scomp_alg scomp = {
.alloc_ctx = crypto842_alloc_ctx,
.free_ctx = crypto842_free_ctx,
@@ -121,25 +73,12 @@ static struct scomp_alg scomp = {

static int __init crypto842_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);
}
subsys_initcall(crypto842_mod_init);

static void __exit crypto842_mod_exit(void)
{
- crypto_unregister_alg(&alg);
crypto_unregister_scomp(&scomp);
}
module_exit(crypto842_mod_exit);
--
2.39.2