Andrea Righi a9943942a5 x86/entry: Build thunk_$(BITS) only if CONFIG_PREEMPTION=y ... [ Upstream commit de979c8357 ] With CONFIG_PREEMPTION disabled, arch/x86/entry/thunk_$(BITS).o becomes an empty object file. With some old versions of binutils (i.e., 2.35.90.20210113-1ubuntu1) the GNU assembler doesn't generate a symbol table for empty object files and objtool fails with the following error when a valid symbol table cannot be found: arch/x86/entry/thunk_64.o: warning: objtool: missing symbol table To prevent this from happening, build thunk_$(BITS).o only if CONFIG_PREEMPTION is enabled. BugLink: https://bugs.launchpad.net/bugs/1911359 Fixes: 320100a5ff ("x86/entry: Remove the TRACE_IRQS cruft") Signed-off-by: Andrea Righi <andrea.righi@canonical.com> Signed-off-by: Ingo Molnar <mingo@kernel.org> Link: https://lore.kernel.org/r/Ys/Ke7EWjcX+ZlXO@arighi-desktop Signed-off-by: Sasha Levin <sashal@kernel.org>		2022-08-21 15:16:13 +02:00
..
syscalls
vdso	x86: link vdso and boot with -z noexecstack --no-warn-rwx-segments	2022-08-21 15:15:18 +02:00
vsyscall	x86/vsyscall_emu/64: Don't use RET in vsyscall emulation	2022-07-25 11:26:38 +02:00
calling.h	x86/retbleed: Add fine grained Kconfig knobs	2022-07-25 11:26:50 +02:00
common.c	x86/entry: Fix noinstr fail in __do_fast_syscall_32()	2021-06-30 08:47:17 -04:00
entry_32.S	x86/speculation: Fix RSB filling with CONFIG_RETPOLINE=n	2022-07-25 11:26:46 +02:00
entry_64_compat.S	objtool: Add entry UNRET validation	2022-07-25 11:26:45 +02:00
entry_64.S	x86/speculation: Fix RSB filling with CONFIG_RETPOLINE=n	2022-07-25 11:26:46 +02:00
entry.S	x86/bugs: Add retbleed=ibpb	2022-07-25 11:26:44 +02:00
Makefile	x86/entry: Build thunk_$(BITS) only if CONFIG_PREEMPTION=y	2022-08-21 15:16:13 +02:00
syscall_32.c
syscall_64.c
syscall_x32.c
thunk_32.S	x86/entry: Build thunk_$(BITS) only if CONFIG_PREEMPTION=y	2022-08-21 15:16:13 +02:00
thunk_64.S	x86/entry: Build thunk_$(BITS) only if CONFIG_PREEMPTION=y	2022-08-21 15:16:13 +02:00