From ac4db926e17a669c788efc89b81a4a0f40648445 Mon Sep 17 00:00:00 2001
From: Geert Uytterhoeven <geert+renesas@glider.be>
Date: Wed, 24 Jan 2024 15:27:35 +0100
Subject: [PATCH] init: remove obsolete arch_call_rest_init() wrapper
Since commit 3570ee046c46b5dc ("s390/smp: keep the original lowcore for
CPU 0"), there is no longer any architecture that needs to override
arch_call_rest_init().
Remove the weak wrapper around rest_init(), call rest_init() directly, and
make rest_init() static.
Link: https://lkml.kernel.org/r/aa10868bfb176eef4abb8bb4a710b85330792694.1706106183.git.geert@linux-m68k.org
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Ilya Leoshkevich <iii@linux.ibm.com>
Cc: Josh Poimboeuf <jpoimboe@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
include/linux/start_kernel.h | 2 --
init/main.c | 9 ++-------
tools/objtool/noreturns.h | 1 -
3 files changed, 2 insertions(+), 10 deletions(-)
diff --git a/include/linux/start_kernel.h b/include/linux/start_kernel.h
index a9806a44a605c..09f994ac87df4 100644
--- a/include/linux/start_kernel.h
+++ b/include/linux/start_kernel.h
@@ -9,7 +9,5 @@
up something else. */
extern asmlinkage void __init __noreturn start_kernel(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 e24b0780fdff7..521f40770e67d 100644
--- a/init/main.c
+++ b/init/main.c
@@ -681,7 +681,7 @@ static void __init setup_command_line(char *command_line)
static __initdata DECLARE_COMPLETION(kthreadd_done);
-noinline void __ref __noreturn rest_init(void)
+static noinline void __ref __noreturn rest_init(void)
{
struct task_struct *tsk;
int pid;
@@ -822,11 +822,6 @@ static int __init early_randomize_kstack_offset(char *buf)
early_param("randomize_kstack_offset", early_randomize_kstack_offset);
#endif
-void __init __weak __noreturn arch_call_rest_init(void)
-{
- rest_init();
-}
-
static void __init print_unknown_bootoptions(void)
{
char *unknown_options;
@@ -1069,7 +1064,7 @@ void start_kernel(void)
kcsan_init();
/* Do the rest non-__init'ed, we're now alive */
- arch_call_rest_init();
+ rest_init();
/*
* Avoid stack canaries in callers of boot_init_stack_canary for gcc-10
diff --git a/tools/objtool/noreturns.h b/tools/objtool/noreturns.h
index 1685d7ea6a9f7..7cda577da897c 100644
--- a/tools/objtool/noreturns.h
+++ b/tools/objtool/noreturns.h
@@ -12,7 +12,6 @@ NORETURN(__reiserfs_panic)
NORETURN(__stack_chk_fail)
NORETURN(__tdx_hypercall_failed)
NORETURN(__ubsan_handle_builtin_unreachable)
-NORETURN(arch_call_rest_init)
NORETURN(arch_cpu_idle_dead)
NORETURN(bch2_trans_in_restart_error)
NORETURN(bch2_trans_restart_error)
--
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