Josh Poimboeuf f38d2e9214 x86/syscall: Mark exit[_group] syscall handlers __noreturn ... [ Upstream commit 9142be9e64 ] The direct-call syscall dispatch function doesn't know that the exit() and exit_group() syscall handlers don't return, so the call sites aren't optimized accordingly. Fix that by marking the exit syscall declarations __noreturn. Fixes the following warnings: vmlinux.o: warning: objtool: x64_sys_call+0x2804: __x64_sys_exit() is missing a __noreturn annotation vmlinux.o: warning: objtool: ia32_sys_call+0x29b6: __ia32_sys_exit_group() is missing a __noreturn annotation Fixes: 1e3ad78334 ("x86/syscall: Don't force use of indirect calls for system calls") Closes: https://lkml.kernel.org/lkml/6dba9b32-db2c-4e6d-9500-7a08852f17a3@paulmck-laptop Reported-by: Paul E. McKenney <paulmck@kernel.org> Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org> Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Tested-by: Paul E. McKenney <paulmck@kernel.org> Link: https://lore.kernel.org/r/5d8882bc077d8eadcc7fd1740b56dfb781f12288.1719381528.git.jpoimboe@kernel.org Signed-off-by: Sasha Levin <sashal@kernel.org>		2024-08-03 08:59:12 +02:00
..
arch	LoongArch changes for v6.9	2024-03-22 10:22:45 -07:00
Documentation	objtool: Move noreturn function list to separate file	2023-05-16 06:31:55 -07:00
include/objtool	objtool: Check local label in add_dead_ends()	2024-03-11 22:23:47 +08:00
.gitignore	objtool: Install libsubcmd in build	2023-01-30 16:27:46 -08:00
Build	objtool: Install libsubcmd in build	2023-01-30 16:27:46 -08:00
builtin-check.c	objtool: Add verbose option for disassembling affected functions	2023-05-16 06:31:51 -07:00
check.c	objtool: Fix compile failure when using the x32 compiler	2024-03-30 22:12:37 +01:00
elf.c	objtool: Remove max symbol name length limitation	2023-10-05 17:01:28 -07:00
Makefile	objtool/LoongArch: Enable orc to be built	2024-03-11 22:23:47 +08:00
noreturns.h	x86/syscall: Mark exit[_group] syscall handlers __noreturn	2024-08-03 08:59:12 +02:00
objtool.c	objtool: Propagate early errors	2023-10-05 17:01:11 -07:00
orc_dump.c	objtool/x86: Separate arch-specific and generic parts	2024-03-11 22:23:47 +08:00
orc_gen.c	objtool/x86: Separate arch-specific and generic parts	2024-03-11 22:23:47 +08:00
special.c	objtool: Get rid of reloc->addend	2023-06-07 10:03:23 -07:00
sync-check.sh	objtool: Add objtool_types.h	2023-03-23 23:18:56 +01:00
weak.c	objtool: Ditch subcommands	2022-04-22 12:32:01 +02:00