user/sven/linux.git/scripts/Makefile.build, branch v4.4.295

tracing: Avoid calling cc-option -mrecord-mcount for every Makefile

2021-02-23T12:58:13Z

commit 07d0408120216b60625c9a5b8012d1c3a907984d upstream. Currently if CONFIG_FTRACE_MCOUNT_RECORD is enabled -mrecord-mcount compiler flag support is tested for every Makefile. Top 4 cc-option usages: 511 -mrecord-mcount 11 -fno-stack-protector 9 -Wno-override-init 2 -fsched-pressure To address that move cc-option from scripts/Makefile.build to top Makefile and export CC_USING_RECORD_MCOUNT to be used in original place. While doing that also add -mrecord-mcount to CC_FLAGS_FTRACE (if gcc actually supports it). Link: http://lkml.kernel.org/r/patch-2.thread-aa7b8d.git-de935bace15a.your-ad-here.call-01533557518-ext-9465@work.hours Acked-by: Andi Kleen Signed-off-by: Vasily Gorbik Signed-off-by: Steven Rostedt (VMware) Signed-off-by: Greg Kroah-Hartman

tracing: Fix SKIP_STACK_VALIDATION=1 build due to bad merge with -mrecord-mcount

2021-02-23T12:58:13Z

commit ed7d40bc67b8353c677b38c6cdddcdc310c0f452 upstream. Non gcc-5 builds with CONFIG_STACK_VALIDATION=y and SKIP_STACK_VALIDATION=1 fail. Example output: /bin/sh: init/.tmp_main.o: Permission denied commit 96f60dfa5819 ("trace: Use -mcount-record for dynamic ftrace"), added a mismatched endif. This causes cmd_objtool to get mistakenly set. Relocate endif to balance the newly added -record-mcount check. Link: http://lkml.kernel.org/r/20180608214746.136554-1-gthelen@google.com Fixes: 96f60dfa5819 ("trace: Use -mcount-record for dynamic ftrace") Acked-by: Andi Kleen Tested-by: David Rientjes Signed-off-by: Greg Thelen Signed-off-by: Steven Rostedt (VMware) Signed-off-by: Greg Kroah-Hartman

trace: Use -mcount-record for dynamic ftrace

2021-02-23T12:58:13Z

commit 96f60dfa5819a065bfdd2f2ba0df7d9cbce7f4dd upstream. gcc 5 supports a new -mcount-record option to generate ftrace tables directly. This avoids the need to run record_mcount manually. Use this option when available. So far doesn't use -mcount-nop, which also exists now. This is needed to make ftrace work with LTO because the normal record-mcount script doesn't run over the link time output. It should also improve build times slightly in the general case. Link: http://lkml.kernel.org/r/20171127213423.27218-12-andi@firstfloor.org Signed-off-by: Andi Kleen Signed-off-by: Steven Rostedt (VMware) Signed-off-by: Greg Kroah-Hartman

kbuild: Add support to generate LLVM assembly files

2018-11-27T15:07:58Z

commit 433db3e260bc8134d4a46ddf20b3668937e12556 upstream. Add rules to kbuild in order to generate LLVM assembly files with the .ll extension when using clang. # from c code make CC=clang kernel/pid.ll Signed-off-by: Vinícius Tinti Signed-off-by: Behan Webster Signed-off-by: Matthias Kaehlcke Signed-off-by: Masahiro Yamada [nc: Fix conflicts due to lack of commit 6b90bd4ba40b3 in linux-4.4.y] Signed-off-by: Nathan Chancellor Signed-off-by: Greg Kroah-Hartman

kbuild: modversions for EXPORT_SYMBOL() for asm

2018-01-23T18:50:17Z

commit 4efca4ed05cbdfd13ec3e8cb623fb77d6e4ab187 upstream. Allow architectures to create asm/asm-prototypes.h file that provides C prototypes for exported asm functions, which enables proper CRC versions to be generated for them. Signed-off-by: Nicholas Piggin Signed-off-by: Michal Marek [jkosina@suse.cz: folded cc6acc11cad1 fixup in as well ] Signed-off-by: Jiri Kosina Signed-off-by: Greg Kroah-Hartman

ftrace: allow architectures to specify ftrace compile options

2015-01-29T08:19:19Z

If the kernel is compiled with function tracer support the -pg compile option is passed to gcc to generate extra code into the prologue of each function. This patch replaces the "open-coded" -pg compile flag with a CC_FLAGS_FTRACE makefile variable which architectures can override if a different option should be used for code generation. Acked-by: Steven Rostedt Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky

kbuild: remove obj-n and lib-n handling

2014-10-02T11:55:02Z

Kconfig never defines CONFIG_* as 'n'. Now obj-n is only used in firmware/Makefile and it can be replaced with obj-. No makefile uses lib-n. Let's rip off obj-n and lib-n. Signed-off-by: Masahiro Yamada Acked-by: Peter Foley Signed-off-by: Michal Marek

kbuild: handle multi-objs dependency appropriately

2014-08-19T08:26:19Z

The comment in scripts/Makefile.build says as follows: We would rather have a list of rules like foo.o: $(foo-objs) but that's not so easy, so we rather make all composite objects depend on the set of all their parts This commit makes it possible! For example, assume a Makefile like this obj-m = foo.o bar.o foo-objs := foo1.o foo2.o bar-objs := bar1.o bar2.o Without this patch, foo.o depends on all of foo1.o foo2.o bar1.o bar2.o. It looks funny that foo.o is regenerated when bar1.c is updated. Now we can handle the dependency of foo.o and bar.o separately. Signed-off-by: Masahiro Yamada Signed-off-by: Michal Marek

kbuild: trivial - remove trailing spaces

2014-04-30T15:34:32Z

Signed-off-by: Masahiro Yamada Signed-off-by: Michal Marek

kbuild: move extra gcc checks to scripts/Makefile.extrawarn

2014-04-16T21:28:41Z

W=... provides extra gcc checks. Having such code in scripts/Makefile.build results in the same flags being added to KBUILD_CFLAGS multiple times becuase scripts/Makefile.build is invoked every time Kbuild descends into the subdirectories. Since the top Makefile is already too cluttered, this commit moves all of extra gcc check stuff to a new file scripts/Makefile.extrawarn, which is included from the top Makefile. Signed-off-by: Masahiro Yamada CC: Sam Ravnborg Signed-off-by: Michal Marek