Helge Deller 9774b96bce modules: Ensure natural alignment for .altinstructions and __bug_table sections ... [ Upstream commit 87c482bdfa ] In the kernel image vmlinux.lds.S linker scripts the .altinstructions and __bug_table sections are 4- or 8-byte aligned because they hold 32- and/or 64-bit values. Most architectures use altinstructions and BUG() or WARN() in modules as well, but in the module linker script (module.lds.S) those sections are currently missing. As consequence the linker will store their content byte-aligned by default, which then can lead to unnecessary unaligned memory accesses by the CPU when those tables are processed at runtime. Usually unaligned memory accesses are unnoticed, because either the hardware (as on x86 CPUs) or in-kernel exception handlers (e.g. on parisc or sparc) emulate and fix them up at runtime. Nevertheless, such unaligned accesses introduce a performance penalty and can even crash the kernel if there is a bug in the unalignment exception handlers (which happened once to me on the parisc architecture and which is why I noticed that issue at all). This patch fixes a non-critical issue and might be backported at any time. It's trivial and shouldn't introduce any regression because it simply tells the linker to use a different (8-byte alignment) for those sections by default. Signed-off-by: Helge Deller <deller@gmx.de> Link: https://lore.kernel.org/all/Yr8%2Fgr8e8I7tVX4d@p100/ Signed-off-by: Luis Chamberlain <mcgrof@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		2022-08-25 11:40:41 +02:00
..
atomic	atomics: Fix atomic64_{read_acquire,set_release} fallbacks	2022-04-08 14:23:57 +02:00
basic	.gitignore: prefix local generated files with a slash	2021-05-02 00:43:35 +09:00
clang-tools	gen_compile_commands: fix missing 'sys' package	2021-09-19 10:13:03 +09:00
coccinelle	scripts: coccinelle: allow list_entry_is_head() to use pos	2021-08-08 22:00:49 +02:00
dtc	scripts/dtc: Call pkg-config POSIXly correct	2022-04-08 14:23:29 +02:00
dummy-tools	kbuild: dummy-tools: avoid tmpdir leak in dummy gcc	2022-08-25 11:40:14 +02:00
gcc-plugins	gcc-plugins: latent_entropy: use /dev/urandom	2022-04-20 09:34:18 +02:00
gdb	scripts/gdb: fix 'lx-dmesg' on 32 bits arch	2022-08-17 14:23:56 +02:00
genksyms	.gitignore: prefix local generated files with a slash	2021-05-02 00:43:35 +09:00
kconfig	kconfig: fix failing to generate auto.conf	2022-02-23 12:03:20 +01:00
ksymoops
mod	modpost: fix section mismatch check for exported init/exit sections	2022-06-29 09:03:31 +02:00
package	kbuild: buildtar: add riscv support	2021-03-29 23:13:30 -07:00
selinux	scripts/selinux,selinux: update mdp to enable policy capabilities	2020-08-17 20:42:00 -04:00
tracing	scripts/tracing: fix the bug that can't parse raw_trace_func	2021-08-04 17:49:26 -04:00
.gitignore	.gitignore: prefix local generated files with a slash	2021-05-02 00:43:35 +09:00
adjust_autoksyms.sh	kbuild: redo fake deps at include/ksym/*.h	2021-09-03 08:17:21 +09:00
as-version.sh	kbuild: Switch to 'f' variants of integrated assembler flag	2021-09-03 08:17:20 +09:00
asn1_compiler.c
bin2c.c
bloat-o-meter	scripts: switch explicitly to Python 3	2021-01-22 06:34:44 +09:00
bootgraph.pl
bpf_doc.py	bpf: Introduce bpf timers.	2021-07-15 22:31:10 +02:00
cc-can-link.sh
cc-version.sh	kbuild: collect minimum tool versions into scripts/min-tool-version.sh	2021-04-25 05:14:26 +09:00
check-sysctl-docs
check_extable.sh	scripts: check_extable: fix typo in user error message	2021-09-08 11:50:28 -07:00
checkdeclares.pl	scripts: make some scripts executable	2021-08-10 09:13:25 +09:00
checkincludes.pl
checkkconfigsymbols.py	checkkconfigsymbols.py: Remove skipping of help lines in parse_kconfig_file	2021-09-19 10:13:03 +09:00
checkpatch.pl	Compiler Attributes: add __alloc_size() for better bounds checking	2022-07-12 16:35:01 +02:00
checkstack.pl
checksyscalls.sh	checksyscalls: Unconditionally ignore fstat{,at}64	2021-10-07 17:16:28 -07:00
checkversion.pl	scripts: checkversion: modernize linux/version.h search strings	2021-08-05 20:55:39 +09:00
cleanfile
cleanpatch
coccicheck	scripts: coccicheck: fix troubles on non-English builds	2021-05-18 11:09:59 +02:00
config	kconfig: config script: add a little user help	2021-01-04 10:38:11 +09:00
const_structs.checkpatch	const_structs.checkpatch: add pinctrl_ops and pinmux_ops	2020-10-16 11:11:21 -07:00
decode_stacktrace.sh	scripts/decode_stacktrace.sh: indicate 'auto' can be used for base path	2021-07-08 11:48:22 -07:00
decodecode	scripts/decodecode: add the capability to supply the program counter	2020-10-13 18:38:26 -07:00
depmod.sh	depmod: handle the case of /sbin/depmod without /sbin in PATH	2021-01-01 12:26:39 -08:00
dev-needs.sh	scripts/dev-needs: Add script to list device dependencies	2020-09-04 18:19:37 +02:00
diffconfig	scripts: switch explicitly to Python 3	2021-01-22 06:34:44 +09:00
documentation-file-ref-check	documentation-file-ref-check: Make git check work for multiple working directories	2021-06-04 11:20:52 -06:00
export_report.pl
extract-cert.c	extract-cert: add static to local data	2020-08-18 20:16:46 +09:00
extract-ikconfig
extract-module-sig.pl
extract-sys-certs.pl
extract-vmlinux
extract_xc3028.pl
faddr2line	scripts/faddr2line: Fix vmlinux detection on arm64	2022-08-17 14:24:14 +02:00
file-size.sh
find-unused-docs.sh
gcc-goto.sh
gcc-ld
gcc-x86_32-has-stack-protector.sh	x86/stackprotector/32: Make the canary into a regular percpu variable	2021-03-08 13:19:05 +01:00
gcc-x86_64-has-stack-protector.sh
gen_autoksyms.sh	kbuild: Fix TRIM_UNUSED_KSYMS with LTO_CLANG	2021-09-03 08:12:39 +09:00
gen_ksymdeps.sh	kbuild: redo fake deps at include/ksym/*.h	2021-09-03 08:17:21 +09:00
generate_initcall_order.pl	init: lto: ensure initcall ordering	2021-01-14 08:21:09 -08:00
get_abi.pl	scripts: get_abi: ignore code blocks for cross-references	2021-03-31 13:53:16 -06:00
get_dvb_firmware
get_feat.pl	scripts: get_feat.pl: reduce table width for all features output	2020-12-04 14:34:27 -07:00
get_maintainer.pl	get_maintainer: exclude MAINTAINERS file(s) from --git-fallback	2020-10-16 11:11:19 -07:00
gfp-translate
headerdep.pl
headers_check.pl
headers_install.sh	Merge branch 'work.fdpic' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2020-08-07 13:29:39 -07:00
insert-sys-cert.c
jobserver-exec	scripts/jobserver-exec: Fix a typo ("envirnoment")	2021-05-17 12:10:03 +09:00
kallsyms.c	kallsyms: fix nonconverging kallsyms table with lld	2021-02-05 17:53:28 +09:00
Kbuild.include	kbuild: warn if FORCE is missing for if_changed(_dep,_rule) and filechk	2021-09-03 08:17:19 +09:00
Kconfig.include	kbuild: check the minimum assembler version in Kconfig	2021-04-25 05:14:41 +09:00
kernel-doc	stddef: Introduce DECLARE_FLEX_ARRAY() helper	2022-07-12 16:35:03 +02:00
ld-version.sh	kbuild: collect minimum tool versions into scripts/min-tool-version.sh	2021-04-25 05:14:26 +09:00
leaking_addresses.pl	leaking_addresses: Always print a trailing newline	2021-11-18 19:16:16 +01:00
Lindent
link-vmlinux.sh	x86/retbleed: Add fine grained Kconfig knobs	2022-07-23 12:54:10 +02:00
Makefile	Fix CVE-2020-26541	2021-04-26 08:38:10 -07:00
Makefile.asm-generic	kbuild: prefix $(srctree)/ to some included Makefiles	2021-03-15 19:20:48 +09:00
Makefile.build	x86/retbleed: Add fine grained Kconfig knobs	2022-07-23 12:54:10 +02:00
Makefile.clang	kbuild: Add -Werror=ignored-optimization-argument to CLANG_FLAGS	2021-09-19 10:55:18 +09:00
Makefile.clean	kbuild: prefix $(srctree)/ to some included Makefiles	2021-03-15 19:20:48 +09:00
Makefile.compiler	kbuild: remove TMPO from try-run	2021-04-25 05:25:56 +09:00
Makefile.dtbinst	kbuild: prefix $(srctree)/ to some included Makefiles	2021-03-15 19:20:48 +09:00
Makefile.extrawarn	Makefile.extrawarn: Move -Wunaligned-access to W=1	2022-02-16 12:56:39 +01:00
Makefile.gcc-plugins	gcc-plugins: Undefine LATENT_ENTROPY_PLUGIN when plugin disabled for a file	2022-08-25 11:40:27 +02:00
Makefile.headersinst	kbuild: prefix $(srctree)/ to some included Makefiles	2021-03-15 19:20:48 +09:00
Makefile.host	kbuild: sort hostprogs before passing it to ifneq	2020-08-10 01:32:59 +09:00
Makefile.kasan	kasan: always respect CONFIG_KASAN_STACK	2021-09-24 16:13:35 -07:00
Makefile.kcov	kbuild: include scripts/Makefile.* only when relevant CONFIG is enabled	2020-08-10 01:32:59 +09:00
Makefile.kcsan	Kbuild updates for v5.10	2020-10-22 13:13:57 -07:00
Makefile.lib	kbuild: move objtool_args back to scripts/Makefile.build	2022-05-15 20:18:50 +02:00
Makefile.modfinal	kbuild: Fix TRIM_UNUSED_KSYMS with LTO_CLANG	2021-09-03 08:12:39 +09:00
Makefile.modinst	kbuild: add support for zstd compressed modules	2021-04-25 05:25:06 +09:00
Makefile.modpost	kbuild: Fix comment typo in scripts/Makefile.modpost	2021-09-19 10:14:19 +09:00
Makefile.package	kbuild: deb-pkg: change the source package name to linux-upstream	2021-04-25 05:30:45 +09:00
Makefile.ubsan	ubsan: remove CONFIG_UBSAN_OBJECT_SIZE	2022-04-13 20:59:27 +02:00
Makefile.userprogs
makelst
markup_oops.pl
min-tool-version.sh	Documentation: raise minimum supported version of GCC to 5.1	2021-09-13 10:18:28 -07:00
mkcompile_h	kbuild: mkcompile_h: consider timestamp if KBUILD_BUILD_TIMESTAMP is set	2021-06-17 10:01:12 +09:00
mksysmap
mkuboot.sh
module.lds.S	modules: Ensure natural alignment for .altinstructions and __bug_table sections	2022-08-25 11:40:41 +02:00
modules-check.sh	kbuild: check module name conflict for external modules as well	2021-04-25 05:22:42 +09:00
nsdeps	kbuild: replace LANG=C with LC_ALL=C	2021-05-02 00:43:35 +09:00
objdiff
parse-maintainers.pl
patch-kernel
profile2linkerlist.pl
prune-kernel
recordmcount.c	ftrace: Have recordmcount use w8 to read relp->r_info in arm64_is_fake_mcount	2021-03-02 17:27:18 -05:00
recordmcount.h	recordmcount: Correct st_shndx handling	2021-06-18 09:09:17 -04:00
recordmcount.pl	recordmcount.pl: fix typo in s390 mcount regex	2022-01-05 12:42:33 +01:00
remove-stale-files	kbuild: add a script to remove stale generated files	2021-05-02 00:43:35 +09:00
setlocalversion	scripts/setlocalversion: fix a bug when LOCALVERSION is empty	2021-07-18 23:48:14 +09:00
show_delta	tweewide: Fix most Shebang lines	2020-12-08 23:30:04 +09:00
sign-file.c
sorttable.c	x86/extable: Rework the exception table mechanics	2022-07-29 17:25:25 +02:00
sorttable.h
spdxcheck-test.sh	scripts/spdxcheck-test.sh: Drop python2	2021-07-21 15:59:32 +02:00
spdxcheck.py	scripts/spdxcheck.py: Strictly read license files in utf-8	2021-07-12 09:56:50 -06:00
spelling.txt	scripts/spelling.txt: add more spellings to spelling.txt	2021-06-29 10:53:45 -07:00
sphinx-pre-install	scripts: sphinx-pre-install: Fix ctex support on Debian	2022-01-27 11:05:44 +01:00
split-man.pl	tweewide: Fix most Shebang lines	2020-12-08 23:30:04 +09:00
stackdelta
stackusage
subarch.include	parisc: Fix compile failure when building 64-bit kernel natively	2021-09-01 21:52:02 +02:00
syscallhdr.sh	scripts: check duplicated syscall number in syscall table	2021-07-09 04:00:39 +09:00
syscallnr.sh	scripts: make some scripts executable	2021-08-10 09:13:25 +09:00
syscalltbl.sh	scripts: check duplicated syscall number in syscall table	2021-07-09 04:00:39 +09:00
tags.sh	kbuild: replace LANG=C with LC_ALL=C	2021-05-02 00:43:35 +09:00
tools-support-relr.sh	Makefile: fix GDB warning with CONFIG_RELR	2021-06-08 13:09:34 +01:00
unifdef.c
ver_linux	Removed the oprofiled version option	2021-05-03 17:23:06 -06:00
xen-hypercalls.sh	scripts: make some scripts executable	2021-08-10 09:13:25 +09:00
xz_wrap.sh