diff options
| author | Vasily Gorbik <gor@linux.ibm.com> | 2018-07-19 13:11:28 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2018-10-09 11:21:02 +0200 |
| commit | 8f75582a2fb6e2c5afc5252b6d6932f61a79c939 (patch) | |
| tree | ce09a3124eabde2b2e88f03d030f2a54ecbe450a /arch/s390/boot/compressed/Makefile | |
| parent | 32ce55a6592fc3e117e70953001a9ea1931f7941 (diff) | |
s390: remove decompressor's head.S
Decompressor's head.S provided "data mover" sole purpose of which has
been to safely move uncompressed kernel at 0x100000 and jump to it.
With current bzImage layout entire decompressor's code guaranteed to be
in a safe location under 0x100000, and hence could not be overwritten
during kernel move. For that reason head.S could be replaced with simple
memmove function. To do so introduce early boot code phase which is
executed from arch/s390/boot/head.S after "verify_facilities" and takes
care of optional kernel image decompression and transition to it.
Reviewed-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/boot/compressed/Makefile')
| -rw-r--r-- | arch/s390/boot/compressed/Makefile | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/arch/s390/boot/compressed/Makefile b/arch/s390/boot/compressed/Makefile index 04609478d18b..c16ded8a35be 100644 --- a/arch/s390/boot/compressed/Makefile +++ b/arch/s390/boot/compressed/Makefile @@ -9,7 +9,7 @@ KCOV_INSTRUMENT := n GCOV_PROFILE := n UBSAN_SANITIZE := n -obj-y := $(if $(CONFIG_KERNEL_UNCOMPRESSED),,head.o misc.o) piggy.o +obj-y := $(if $(CONFIG_KERNEL_UNCOMPRESSED),,misc.o) piggy.o targets := vmlinux.lds vmlinux vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2 targets += vmlinux.bin.xz vmlinux.bin.lzma vmlinux.bin.lzo vmlinux.bin.lz4 targets += vmlinux.scr.lds $(obj-y) $(if $(CONFIG_KERNEL_UNCOMPRESSED),,sizes.h) @@ -32,9 +32,6 @@ quiet_cmd_sizes = GEN $@ $(obj)/sizes.h: vmlinux $(call if_changed,sizes) -AFLAGS_head.o += -I$(objtree)/$(obj) -$(obj)/head.o: $(obj)/sizes.h - CFLAGS_misc.o += -I$(objtree)/$(obj) $(obj)/misc.o: $(obj)/sizes.h |