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| author |   Paul Cercueil <paul@crapouillou.net> | 2020-09-01 16:26:51 +0200 |
|---|---|---|
| committer |   Thomas Bogendoerfer <tsbogend@alpha.franken.de> | 2020-09-03 10:13:24 +0200 |
| commit | a510b616131f85215ba156ed67e5ed1c0701f80f (patch) | |
| tree | 48a1c75c75ee4d4fb7633feba8b52ab8ef0752ae /arch/mips/boot/compressed/Makefile | |
| parent | lib: decompress_unzstd: Limit output size (diff) | |
| download | linux-dev-a510b616131f85215ba156ed67e5ed1c0701f80f.tar.xz linux-dev-a510b616131f85215ba156ed67e5ed1c0701f80f.zip | |
MIPS: Add support for ZSTD-compressed kernels
Add support for self-extracting kernels with a ZSTD compression.
Tested on a kernel for the GCW-Zero, it allows to reduce the size of the
kernel file from 4.1 MiB with gzip to 3.5 MiB with ZSTD, and boots just
as fast.
Compressed kernels are now also compiled with -D__DISABLE_EXPORTS in
order to disable the EXPORT_SYMBOL() macros inside of
lib/zstd/decompress.c.
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Diffstat (limited to 'arch/mips/boot/compressed/Makefile')
| -rw-r--r-- | arch/mips/boot/compressed/Makefile | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/mips/boot/compressed/Makefile b/arch/mips/boot/compressed/Makefile index 6e56caef69f0..9a9ba77b745e 100644 --- a/arch/mips/boot/compressed/Makefile +++ b/arch/mips/boot/compressed/Makefile @@ -22,7 +22,7 @@ KBUILD_CFLAGS := $(filter-out -pg, $(KBUILD_CFLAGS)) KBUILD_CFLAGS := $(filter-out -fstack-protector, $(KBUILD_CFLAGS)) -KBUILD_CFLAGS := $(KBUILD_CFLAGS) -D__KERNEL__ \ +KBUILD_CFLAGS := $(KBUILD_CFLAGS) -D__KERNEL__ -D__DISABLE_EXPORTS \ -DBOOT_HEAP_SIZE=$(BOOT_HEAP_SIZE) -D"VMLINUX_LOAD_ADDRESS_ULL=$(VMLINUX_LOAD_ADDRESS)ull" KBUILD_AFLAGS := $(KBUILD_AFLAGS) -D__ASSEMBLY__ \ @@ -70,6 +70,7 @@ tool_$(CONFIG_KERNEL_LZ4) = lz4 tool_$(CONFIG_KERNEL_LZMA) = lzma tool_$(CONFIG_KERNEL_LZO) = lzo tool_$(CONFIG_KERNEL_XZ) = xzkern +tool_$(CONFIG_KERNEL_ZSTD) = zstd22 targets += vmlinux.bin.z $(obj)/vmlinux.bin.z: $(obj)/vmlinux.bin FORCE |