The following commit has been merged into the objtool/core branch of tip:
Commit-ID: 9ea7e6b62c2bd2f7bbfc3f10099df803002dd33b
Gitweb: https://git.kernel.org/tip/9ea7e6b62c2bd2f7bbfc3f10099df803002dd33b
Author: Josh Poimboeuf <jpoimboe@xxxxxxxxxx>
AuthorDate: Wed, 12 Apr 2023 16:49:31 -07:00
Committer: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
CommitterDate: Fri, 14 Apr 2023 17:31:23 +02:00
init: Mark [arch_call_]rest_init() __noreturn
In preparation for improving objtool's handling of weak noreturn
functions, mark start_kernel(), arch_call_rest_init(), and rest_init()
__noreturn.
Signed-off-by: Josh Poimboeuf <jpoimboe@xxxxxxxxxx>
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Reviewed-by: Nick Desaulniers <ndesaulniers@xxxxxxxxxx>
Link: https://lore.kernel.org/r/7194ed8a989a85b98d92e62df660f4a90435a723.1681342859.git.jpoimboe@xxxxxxxxxx
---
arch/s390/kernel/setup.c | 2 +-
include/linux/start_kernel.h | 4 ++--
init/main.c | 4 ++--
tools/objtool/check.c | 2 ++
4 files changed, 7 insertions(+), 5 deletions(-)
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index 8ec5cdf..4259b6c 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -396,7 +396,7 @@ int __init arch_early_irq_init(void)
return 0;
}
-void __init arch_call_rest_init(void)
+void __init __noreturn arch_call_rest_init(void)
{
unsigned long stack;
diff --git a/include/linux/start_kernel.h b/include/linux/start_kernel.h
index 8b369a4..864921e 100644
--- a/include/linux/start_kernel.h
+++ b/include/linux/start_kernel.h
@@ -9,7 +9,7 @@
up something else. */
extern asmlinkage void __init start_kernel(void);
-extern void __init arch_call_rest_init(void);
-extern void __ref rest_init(void);
+extern void __init __noreturn arch_call_rest_init(void);
+extern void __ref __noreturn rest_init(void);
#endif /* _LINUX_START_KERNEL_H */
diff --git a/init/main.c b/init/main.c
index 4425d17..161ed95 100644
--- a/init/main.c
+++ b/init/main.c
@@ -683,7 +683,7 @@ static void __init setup_command_line(char *command_line)
static __initdata DECLARE_COMPLETION(kthreadd_done);
-noinline void __ref rest_init(void)
+noinline void __ref __noreturn rest_init(void)
{
struct task_struct *tsk;
int pid;
@@ -889,7 +889,7 @@ static int __init early_randomize_kstack_offset(char *buf)
early_param("randomize_kstack_offset", early_randomize_kstack_offset);
#endif
-void __init __weak arch_call_rest_init(void)
+void __init __weak __noreturn arch_call_rest_init(void)
{
rest_init();
}
diff --git a/tools/objtool/check.c b/tools/objtool/check.c
index df634da..3d7227f 100644
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -202,6 +202,7 @@ static bool __dead_end_function(struct objtool_file *file, struct symbol *func,
"__reiserfs_panic",
"__stack_chk_fail",
"__ubsan_handle_builtin_unreachable",
+ "arch_call_rest_init",
"arch_cpu_idle_dead",
"cpu_bringup_and_idle",
"cpu_startup_entry",
@@ -217,6 +218,7 @@ static bool __dead_end_function(struct objtool_file *file, struct symbol *func,
"machine_real_restart",
"make_task_dead",
"panic",
+ "rest_init",
"rewind_stack_and_make_dead",
"sev_es_terminate",
"snp_abort",
|