kernel.git/arch/s390/boot/Makefile, branch linux-4.19.y

s390: make 'install' not depend on vmlinux

2020-03-11T13:14:53Z

[ Upstream commit 94e90f727f7424d827256023cace829cad6896f4 ] For the same reason as commit 19514fc665ff ("arm, kbuild: make "make install" not depend on vmlinux"), the install targets should never trigger the rebuild of the kernel. The variable, CONFIGURE, is not set by anyone. Remove it as well. Link: https://lkml.kernel.org/r/20200216144829.27023-1-masahiroy@kernel.org Signed-off-by: Masahiro Yamada Signed-off-by: Vasily Gorbik Signed-off-by: Sasha Levin

s390/kasan: avoid instrumentation of early C code

2019-11-24T07:20:44Z

[ Upstream commit 0a9b40911baffac6fc9cc2d88e893585870a97f7 ] Instrumented C code cannot run without the kasan shadow area. Exempt source code files from kasan which are running before / used during kasan initialization. Reviewed-by: Martin Schwidefsky Signed-off-by: Vasily Gorbik Signed-off-by: Martin Schwidefsky Signed-off-by: Sasha Levin

s390/decompressor: avoid packing *.o.chkbss files into startup.a

2018-07-02T10:32:22Z

startup.a build rule packs a list of prerequisites into archive. That didn't take into account extra prerequisites added by chkbss, so that zero length *.o.chkbss files were also packed into the archive. To avoid that filter only real object from prerequisites list. Acked-by: Heiko Carstens Signed-off-by: Vasily Gorbik Signed-off-by: Martin Schwidefsky

s390/decompressor: avoid constant startup.a rebuilds

2018-07-02T10:32:21Z

Correct merging error which replaced startup.a in targets list with non-existing setup.a. Due to missing startup.a in targets list if_changed triggered startup.a rebuild unconditionally. Fixes: 3e200c54438d ("s390/decompressor: avoid reusing uncompressed image objects") Acked-by: Heiko Carstens Signed-off-by: Vasily Gorbik Signed-off-by: Martin Schwidefsky

s390/decompressor: extend .bss check for early code

2018-06-25T08:14:40Z

Cover the decompressor code with no .bss usage compile time check. Reviewed-by: Heiko Carstens Signed-off-by: Vasily Gorbik Signed-off-by: Martin Schwidefsky

s390/decompressor: reuse lib/mem.S for mem functions

2018-06-25T08:14:39Z

Reusing arch/s390/lib/mem.S file solves a problem that sclp_early_core.c and its dependencies have to be compiled with -march=z900 (no need to compile compressed/misc.c with -march=z900). This also allows to avoid mem functions duplicates, makes code a bit smaller and optimized mem functions are utilized. Reviewed-by: Heiko Carstens Signed-off-by: Vasily Gorbik Signed-off-by: Martin Schwidefsky

s390/decompressor: avoid reusing uncompressed image objects

2018-06-25T08:14:39Z

Re-compile ebcdic.c and sclp_early_core.c for the decompressor, using proper decompressor CFLAGS. This also allows to potentially use instrumentation for those files when built for the main kernel image. With kbuild there is no easy way to re-compile a source file from another directory. Bypass ugly rules and Makefile meta-programming with relative path includes of original files. Reviewed-by: Heiko Carstens Signed-off-by: Vasily Gorbik Signed-off-by: Martin Schwidefsky

s390/boot: make head.S and als.c be part of the decompressor only

2018-06-25T08:14:38Z

Since uncompressed kernel image does not have to be bootable anymore, move head.S, head_kdump.S and als.c to boot/ folder and compile them in just in the decompressor. Reviewed-by: Heiko Carstens Signed-off-by: Vasily Gorbik Signed-off-by: Martin Schwidefsky

s390: remove uncompressed kernel image build

2018-06-25T08:14:38Z

Dropping support for uncompressed kernel "image" build. Having both image and bzImage makes it complicated to add new code to an early boot phase (which is part of vmlinux for uncompressed kernel and a separate arch/s390/boot/compressed/vmlinux for bzImage). e.g. sclp_early_core.o is used for both, the decompressor phase and the main kernel. The fact of having uncompressed kernel "image" forces us to have a single object file and sacrifice instrumentation flags on such files (so that we could use them early). The story gets much more complicated with the need to utilize some of the string functions. With bzImage only support, we have 2 separate boot stages each built and linked separately, which allows to reuse some shared code, but recompile with appropriate flags. Reviewed-by: Heiko Carstens Signed-off-by: Vasily Gorbik Signed-off-by: Martin Schwidefsky

s390/boot: remove unused COMPILE_VERSION and ccflags-y

2018-04-16T07:10:24Z

ccflags-y has no effect (no code is built in that directory, arch/s390/boot/compressed/Makefile defines its own KBUILD_CFLAGS). Removing ccflags-y together with COMPILE_VERSION. Reviewed-by: Heiko Carstens Signed-off-by: Vasily Gorbik Signed-off-by: Martin Schwidefsky