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

Ard Biesheuvel
2023-07-18T13:00:25Z

The 'comp' API is obsolete and will be removed, so remove this comp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

Signed-off-by: Ard Biesheuvel <ardb@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