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linux-stable/arch/um/os-Linux
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Kees Cook c7500c1b53 um: Allow builds with Clang 
Add SUBARCH target for Clang+um (which must go last, not alphabetically,
so the other SUBARCHes are assigned). Remove open-coded "DEFINE"
macro, instead using linux/kbuild.h's version which was updated to use
Clang-friendly assembly in commit cf0c3e68aa ("kbuild: fix asm-offset
generation to work with clang"). Redefine "DEFINE_LONGS" in terms of
"COMMENT" and "DEFINE" so that the intended coment actually has useful
content. Add a missed "break" to avoid implicit fall-through warnings.

This lets me run KUnit tests with Clang:

$ ./tools/testing/kunit/kunit.py run --make_options LLVM=1
...

Cc: Jeff Dike <jdike@addtoit.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Anton Ivanov <anton.ivanov@cambridgegreys.com>
Cc: Masahiro Yamada <masahiroy@kernel.org>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: David Gow <davidgow@google.com>
Cc: linux-um@lists.infradead.org
Cc: linux-kbuild@vger.kernel.org
Cc: linux-kselftest@vger.kernel.org
Cc: kunit-dev@googlegroups.com
Cc: llvm@lists.linux.dev
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Link: https://lore.kernel.org/lkml/Yg2YubZxvYvx7%2Fnm@dev-arch.archlinux-ax161/
Tested-by: David Gow <davidgow@google.com>
Link: https://lore.kernel.org/lkml/CABVgOSk=oFxsbSbQE-v65VwR2+mXeGXDDjzq8t7FShwjJ3+kUg@mail.gmail.com/
Signed-off-by: Kees Cook <keescook@chromium.org>
---
v1: https://lore.kernel.org/lkml/20220217002843.2312603-1-keescook@chromium.org
v2: https://lore.kernel.org/lkml/20220224055831.1854786-1-keescook@chromium.org
v3:
 - use kbuild.h to avoid duplication (Masahiro)
 - fix intended comments (Masahiro)
 - use SUBARCH (Nathan)
2022-03-21 08:13:03 -07:00
..
drivers um: Add SPDX headers for files in arch/um/os-Linux 2019-09-15 21:37:17 +02:00
skas um: Fix stack pointer alignment 2021-06-17 22:08:31 +02:00
elf_aux.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
execvp.c um: Allow builds with Clang 2022-03-21 08:13:03 -07:00
file.c um: Use fdatasync() when mapping the UBD FSYNC command 2020-06-02 22:37:55 +02:00
helper.c um: Fix stack pointer alignment 2021-06-17 22:08:31 +02:00
irq.c um: Monitor error events in IRQ controller 2020-12-13 22:38:28 +01:00
main.c um: Don't trace irqflags during shutdown 2019-11-25 22:42:57 +01:00
Makefile um: Increase stack frame size threshold for signal.c 2020-12-13 22:22:00 +01:00
mem.c um: Add SPDX headers for files in arch/um/os-Linux 2019-09-15 21:37:17 +02:00
process.c um: Add SPDX headers for files in arch/um/os-Linux 2019-09-15 21:37:17 +02:00
registers.c um: registers: Rename function names to avoid conflicts and build problems 2021-12-21 21:22:19 +01:00
sigio.c um: Use swap() to make code cleaner 2021-12-21 21:41:04 +01:00
signal.c um: rename set_signals() to um_set_signals() 2021-12-21 21:13:44 +01:00
start_up.c um: registers: Rename function names to avoid conflicts and build problems 2021-12-21 21:22:19 +01:00
time.c um: fix os_idle_sleep() to not hang 2021-01-26 22:11:38 +01:00
tty.c um: Add SPDX headers for files in arch/um/os-Linux 2019-09-15 21:37:17 +02:00
umid.c um: Remove use of asprinf in umid.c 2020-12-13 22:21:07 +01:00
user_syms.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
util.c isystem: trim/fixup stdarg.h and other headers 2021-08-19 09:02:55 +09:00