[Buildroot] [PATCH] linux: add support for ZSTD compression

[Paul Cercueil]

Add support for creating self-extractible kernels compressed with ZSTD.

Signed-off-by: Paul Cercueil <paul at crapouillou.net>
---
 linux/Config.in | 3 +++
 linux/linux.mk  | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/linux/Config.in b/linux/Config.in
index 03840f7b27..2d00b33b8c 100644
--- a/linux/Config.in
+++ b/linux/Config.in
@@ -321,6 +321,9 @@ config BR2_LINUX_KERNEL_LZO
 config BR2_LINUX_KERNEL_XZ
 	bool "xz compression"
 
+config BR2_LINUX_KERNEL_ZSTD
+	bool "zstd compression"
+
 endchoice
 
 config BR2_LINUX_KERNEL_IMAGE_TARGET_NAME
diff --git a/linux/linux.mk b/linux/linux.mk
index b90b032bb9..08964ad01a 100644
--- a/linux/linux.mk
+++ b/linux/linux.mk
@@ -98,12 +98,15 @@ else ifeq ($(BR2_LINUX_KERNEL_LZO),y)
 LINUX_DEPENDENCIES += host-lzop
 else ifeq ($(BR2_LINUX_KERNEL_XZ),y)
 LINUX_DEPENDENCIES += host-xz
+else ifeq ($(BR2_LINUX_KERNEL_ZSTD),y)
+LINUX_DEPENDENCIES += host-zstd
 endif
 LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_GZIP) += CONFIG_KERNEL_GZIP
 LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_LZ4) += CONFIG_KERNEL_LZ4
 LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_LZMA) += CONFIG_KERNEL_LZMA
 LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_LZO) += CONFIG_KERNEL_LZO
 LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_XZ) += CONFIG_KERNEL_XZ
+LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_ZSTD) += CONFIG_KERNEL_ZSTD
 
 ifeq ($(BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL),y)
 LINUX_DEPENDENCIES += host-openssl
-- 
2.28.0