kernel: remove ubifs xz decompression support

It has been unused, and less useful than squashfs for cases where flash
space usage matters.

Signed-off-by: Felix Fietkau <nbd@nbd.name>

1 files changed, 0 insertions, 146 deletions

diff --git a/target/linux/generic/patches-4.4/540-crypto-xz-decompression-support.patch b/target/linux/generic/patches-4.4/540-crypto-xz-decompression-support.patch
deleted file mode 100644
index 8a3377d41c..0000000000
--- a/target/linux/generic/patches-4.4/540-crypto-xz-decompression-support.patch
+++ /dev/null
@@ -1,146 +0,0 @@
---- a/crypto/Kconfig
-+++ b/crypto/Kconfig
-@@ -1544,6 +1544,13 @@ config CRYPTO_LZ4HC
- 	help
- 	  This is the LZ4 high compression mode algorithm.
- 
-+config CRYPTO_XZ
-+	tristate "XZ compression algorithm"
-+	select CRYPTO_ALGAPI
-+	select XZ_DEC
-+	help
-+	  This is the XZ algorithm. Only decompression is supported for now.
-+
- comment "Random Number Generation"
- 
- config CRYPTO_ANSI_CPRNG
---- a/crypto/Makefile
-+++ b/crypto/Makefile
-@@ -108,6 +108,7 @@ obj-$(CONFIG_CRYPTO_AUTHENC) += authenc.
- obj-$(CONFIG_CRYPTO_LZO) += lzo.o
- obj-$(CONFIG_CRYPTO_LZ4) += lz4.o
- obj-$(CONFIG_CRYPTO_LZ4HC) += lz4hc.o
-+obj-$(CONFIG_CRYPTO_XZ) += xz.o
- obj-$(CONFIG_CRYPTO_842) += 842.o
- obj-$(CONFIG_CRYPTO_RNG2) += rng.o
- obj-$(CONFIG_CRYPTO_ANSI_CPRNG) += ansi_cprng.o
---- /dev/null
-+++ b/crypto/xz.c
-@@ -0,0 +1,117 @@
-+/*
-+ * Cryptographic API.
-+ *
-+ * XZ decompression support.
-+ *
-+ * Copyright (c) 2012 Gabor Juhos <juhosg@openwrt.org>
-+ *
-+ * This program is free software; you can redistribute it and/or modify it
-+ * under the terms of the GNU General Public License version 2 as published by
-+ * the Free Software Foundation.
-+ *
-+ */
-+#include <linux/init.h>
-+#include <linux/module.h>
-+#include <linux/crypto.h>
-+#include <linux/xz.h>
-+#include <linux/interrupt.h>
-+#include <linux/mm.h>
-+#include <linux/net.h>
-+
-+struct xz_comp_ctx {
-+	struct xz_dec	*decomp_state;
-+	struct xz_buf	decomp_buf;
-+};
-+
-+static int crypto_xz_decomp_init(struct xz_comp_ctx *ctx)
-+{
-+	ctx->decomp_state = xz_dec_init(XZ_SINGLE, 0);
-+	if (!ctx->decomp_state)
-+		return -ENOMEM;
-+
-+	return 0;
-+}
-+
-+static void crypto_xz_decomp_exit(struct xz_comp_ctx *ctx)
-+{
-+	xz_dec_end(ctx->decomp_state);
-+}
-+
-+static int crypto_xz_init(struct crypto_tfm *tfm)
-+{
-+	struct xz_comp_ctx *ctx = crypto_tfm_ctx(tfm);
-+
-+	return crypto_xz_decomp_init(ctx);
-+}
-+
-+static void crypto_xz_exit(struct crypto_tfm *tfm)
-+{
-+	struct xz_comp_ctx *ctx = crypto_tfm_ctx(tfm);
-+
-+	crypto_xz_decomp_exit(ctx);
-+}
-+
-+static int crypto_xz_compress(struct crypto_tfm *tfm, const u8 *src,
-+			      unsigned int slen, u8 *dst, unsigned int *dlen)
-+{
-+	return -EOPNOTSUPP;
-+}
-+
-+static int crypto_xz_decompress(struct crypto_tfm *tfm, const u8 *src,
-+				unsigned int slen, u8 *dst, unsigned int *dlen)
-+{
-+	struct xz_comp_ctx *dctx = crypto_tfm_ctx(tfm);
-+	struct xz_buf *xz_buf = &dctx->decomp_buf;
-+	int ret;
-+
-+	memset(xz_buf, '\0', sizeof(struct xz_buf));
-+
-+	xz_buf->in = (u8 *) src;
-+	xz_buf->in_pos = 0;
-+	xz_buf->in_size = slen;
-+	xz_buf->out = (u8 *) dst;
-+	xz_buf->out_pos = 0;
-+	xz_buf->out_size = *dlen;
-+
-+	ret = xz_dec_run(dctx->decomp_state, xz_buf);
-+	if (ret != XZ_STREAM_END) {
-+		ret = -EINVAL;
-+		goto out;
-+	}
-+
-+	*dlen = xz_buf->out_pos;
-+	ret = 0;
-+
-+out:
-+	return ret;
-+}
-+
-+static struct crypto_alg crypto_xz_alg = {
-+	.cra_name		= "xz",
-+	.cra_flags		= CRYPTO_ALG_TYPE_COMPRESS,
-+	.cra_ctxsize		= sizeof(struct xz_comp_ctx),
-+	.cra_module		= THIS_MODULE,
-+	.cra_list		= LIST_HEAD_INIT(crypto_xz_alg.cra_list),
-+	.cra_init		= crypto_xz_init,
-+	.cra_exit		= crypto_xz_exit,
-+	.cra_u			= { .compress = {
-+	.coa_compress 		= crypto_xz_compress,
-+	.coa_decompress  	= crypto_xz_decompress } }
-+};
-+
-+static int __init crypto_xz_mod_init(void)
-+{
-+	return crypto_register_alg(&crypto_xz_alg);
-+}
-+
-+static void __exit crypto_xz_mod_exit(void)
-+{
-+	crypto_unregister_alg(&crypto_xz_alg);
-+}
-+
-+module_init(crypto_xz_mod_init);
-+module_exit(crypto_xz_mod_exit);
-+
-+MODULE_LICENSE("GPL v2");
-+MODULE_DESCRIPTION("Crypto XZ decompression support");
-+MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>");