Josh Poimboeuf 3f135e57a4 x86/build: Mostly disable '-maccumulate-outgoing-args' ... The GCC '-maccumulate-outgoing-args' flag is enabled for most configs, mostly because of issues which are no longer relevant. For most configs, and with most recent versions of GCC, it's no longer needed. Clarify which cases need it, and only enable it for those cases. Also produce a compile-time error for the ftrace graph + mcount + '-Os' case, which will otherwise cause runtime failures. The main benefit of '-maccumulate-outgoing-args' is that it prevents an ugly prologue for functions which have aligned stacks. But removing the option also has some benefits: more readable argument saves, smaller text size, and (presumably) slightly improved performance. Here are the object size savings for 32-bit and 64-bit defconfig kernels: text data bss dec hex filename 10006710 3543328 1773568 15323606 e9d1d6 vmlinux.x86-32.before 9706358 3547424 1773568 15027350 e54c96 vmlinux.x86-32.after text data bss dec hex filename 10652105 4537576 843776 16033457 f4a6b1 vmlinux.x86-64.before 10639629 4537576 843776 16020981 f475f5 vmlinux.x86-64.after That comes out to a 3% text size improvement on x86-32 and a 0.1% text size improvement on x86-64. Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Andrew Lutomirski <luto@kernel.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Pavel Machek <pavel@ucw.cz> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20170316193133.zrj6gug53766m6nn@treble Signed-off-by: Ingo Molnar <mingo@kernel.org>		2017-03-30 11:53:04 +02:00
..
basic	fixdep: faster CONFIG_ search	2016-08-24 22:34:19 +02:00
coccinelle	Coccinelle: misc: Add support for devm variant in all modes	2016-12-11 12:08:26 +01:00
dtc	scripts/dtc: Update to upstream version 0931cea3ba20	2017-01-04 10:47:53 -06:00
gcc-plugins	Fixes a typo in sancov plugin, exposed in earlier compiler versions	2017-03-09 18:05:41 -08:00
gdb	Revert "scripts/gdb: add a Radix Tree Parser"	2016-07-15 14:54:27 +09:00
genksyms	kbuild: modversions: add infrastructure for emitting relative CRCs	2017-02-03 08:28:25 -08:00
kconfig	Merge branch 'kconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild	2016-12-17 16:30:24 -08:00
ksymoops
mod	objtool, modules: Discard objtool annotation sections for modules	2017-03-01 20:32:25 +01:00
package	Merge branch 'kbuild/rc-fixes' into kbuild/misc	2016-12-11 21:20:34 +01:00
selinux	selinux: use the kernel headers when building scripts/selinux	2016-12-21 10:39:25 -05:00
tracing	ftrace/scripts: Add helper script to bisect function tracing problem functions	2016-09-21 13:56:55 -04:00
.gitignore	KEYS: Reserve an extra certificate symbol for inserting without recompiling	2016-02-26 15:30:20 +00:00
adjust_autoksyms.sh	kbuild: fix scripts/adjust_autoksyms.sh* for the no modules case	2016-12-11 22:30:10 +01:00
analyze_suspend.py	AnalyzeSuspend: fix drag and zoom bug in javascript	2017-02-16 00:52:35 +01:00
asn1_compiler.c	ASN.1: fix open failure check on headername	2016-04-06 14:06:48 +01:00
bloat-o-meter	scripts/bloat-o-meter: compile .NUMBER regex	2016-12-12 18:55:06 -08:00
bootgraph.pl
check-lc_ctype.c
check_00index.sh	scripts: add a script to check if Documentation/00-INDEX is sane	2016-12-05 14:21:24 -07:00
check_extable.sh
checkincludes.pl	scripts/checkincludes.pl: add exit message for no duplicates found	2017-02-22 16:41:26 -08:00
checkkconfigsymbols.py	checkkconfigsymbols.py: support Kconfig's 'imply' statement	2017-02-03 11:49:06 +01:00
checkpatch.pl	checkpatch: warn when formats use %Z and suggest %z	2017-02-27 18:43:48 -08:00
checkstack.pl	OpenRISC updates for 4.11	2017-02-24 18:37:03 -08:00
checksyscalls.sh
checkversion.pl
cleanfile
cleanpatch
coccicheck	scripts/coccicheck: Update reference for the corresponding documentation	2016-10-11 09:50:43 +02:00
config
conmakehash.c
const_structs.checkpatch	const_structs.checkpatch: add frequently used from Julia Lawall's list	2016-10-11 15:06:30 -07:00
decode_stacktrace.sh	scripts/decode_stacktrace.sh: Fix address line detection on x86	2016-11-29 14:19:50 +01:00
decodecode
depmod.sh
diffconfig
docproc.c	docproc: print a comment about autogeneration for rst output	2016-05-14 09:56:56 -06:00
export_report.pl
extract-cert.c
extract-ikconfig
extract-module-sig.pl	KEYS: Provide a script to extract a module signature	2015-10-21 15:18:36 +01:00
extract-sys-certs.pl	KEYS: Use the symbol value for list size, updated by scripts/insert-sys-cert	2016-02-26 15:32:05 +00:00
extract-vmlinux
extract_xc3028.pl	[media] extract_xc3028.pl: move it to scripts/dir	2016-07-17 14:08:12 -03:00
faddr2line	scripts/faddr2line: Fix "size mismatch" error	2016-10-25 18:40:37 +02:00
gcc-goto.sh
gcc-ld
gcc-plugin.sh	gcc-plugins: abort builds cleanly when not supported	2016-08-08 17:49:05 -07:00
gcc-version.sh
gcc-x86_32-has-stack-protector.sh
gcc-x86_64-has-stack-protector.sh	scripts/has-stack-protector: add -fno-PIE	2016-11-09 22:28:05 +01:00
gen_initramfs_list.sh	initramfs: Escape colons in depfile	2016-09-23 10:35:32 +02:00
get_dvb_firmware	[media] doc-rst: move DVB avulse docs to Documentation/media	2016-07-17 14:02:45 -03:00
get_maintainer.pl	get_maintainer: look for arbitrary letter prefixes in sections	2016-12-12 18:55:09 -08:00
gfp-translate
headerdep.pl
headers.sh
headers_check.pl	headers_check: don't warn about c++ guards	2016-05-24 14:12:48 +10:00
headers_install.sh
insert-sys-cert.c	KEYS: Reserve an extra certificate symbol for inserting without recompiling	2016-02-26 15:30:20 +00:00
kallsyms.c	kbuild: modversions: add infrastructure for emitting relative CRCs	2017-02-03 08:28:25 -08:00
Kbuild.include	x86/build: Mostly disable '-maccumulate-outgoing-args'	2017-03-30 11:53:04 +02:00
kernel-doc	kernel-doc: Handle returning pointers to pointers	2017-01-26 15:20:10 -07:00
kernel-doc-xml-ref
ld-version.sh	ld-version: Drop the 4th and 5th version components	2016-05-13 14:02:05 +02:00
Lindent	scripts/Lindent: clean up and optimize	2017-02-22 16:41:26 -08:00
link-vmlinux.sh	kbuild: minor improvement for thin archives build	2016-11-29 15:58:57 +01:00
Makefile	GCC plugin infrastructure	2016-06-07 22:57:10 +02:00
Makefile.asm-generic	kbuild: Remove stale asm-generic wrappers	2016-07-07 15:58:45 +02:00
Makefile.build	kbuild: modversions: add infrastructure for emitting relative CRCs	2017-02-03 08:28:25 -08:00
Makefile.clean	Shared library support	2016-06-07 22:57:10 +02:00
Makefile.dtbinst	dtbsinstall: don't move target directory out of the way	2016-01-28 11:40:32 +01:00
Makefile.extrawarn	Kbuild: enable -Wmaybe-uninitialized warnings by default	2016-11-11 08:45:08 -08:00
Makefile.fwinst
Makefile.gcc-plugins	powerpc updates for 4.11 part 1.	2017-02-22 10:30:38 -08:00
Makefile.headersinst
Makefile.help
Makefile.host	Shared library support	2016-06-07 22:57:10 +02:00
Makefile.kasan	kasan: turn on -fsanitize-address-use-after-scope	2016-12-12 18:55:09 -08:00
Makefile.lib	Merge branch 'akpm' (patches from Andrew)	2016-08-02 21:08:07 -04:00
Makefile.modbuiltin
Makefile.modinst
Makefile.modpost	kbuild: add arch specific post-link Makefile	2016-09-09 10:47:00 +02:00
Makefile.modsign
Makefile.ubsan	Kbuild: enable -Wmaybe-uninitialized warning for "make W=1"	2016-11-11 08:45:08 -08:00
makelst
markup_oops.pl
mkcompile_h
mkmakefile
mksysmap
mkuboot.sh
mkversion
module-common.lds	There was some breakage with the changes for jump labels in the 4.11 merge	2017-03-07 09:37:28 -08:00
namespace.pl	kallsyms: add support for relative offsets in kallsyms address table	2016-03-15 16:55:16 -07:00
objdiff
patch-kernel
pnmtologo.c
profile2linkerlist.pl
prune-kernel	scripts: add "prune-kernel" script to clean up old kernel images	2016-02-09 10:09:52 -08:00
recordmcount.c	recordmcount: arm: Implement make_nop	2016-11-14 16:43:00 -05:00
recordmcount.h	recordmcount: Fix endianness handling bug for nop_mcount	2015-11-03 10:45:26 -05:00
recordmcount.pl	scripts/spelling.txt: add "swith" pattern and fix typo instances	2017-02-27 18:43:46 -08:00
setlocalversion	kbuild: setlocalversion: print error to STDERR	2016-06-20 17:37:45 +02:00
show_delta
sign-file.c	sign-file: fix build error in sign-file.c with libressl	2017-02-10 12:43:47 +11:00
sortextable.c	powerpc: Build-time sort the exception table	2016-11-14 11:11:51 +11:00
sortextable.h
spelling.txt	scripts/spelling.txt: add "overide" pattern and fix typo instances	2017-03-09 17:01:09 -08:00
stackdelta
stackusage
tags.sh	scripts/tags.sh: include arch/Kconfig* for tags generation	2017-02-22 16:41:26 -08:00
unifdef.c
ver_linux	ver_linux: rename ver_linux.awk to ver_linux	2016-08-31 13:59:31 +02:00
xen-hypercalls.sh
xz_wrap.sh