trap: cleanup trap_init()

JIRA: https://issues.redhat.com/browse/RHEL-65658

commit 8b09788
Author: Kefeng Wang <wangkefeng.wang@huawei.com>
Date:   Tue Sep 7 20:16:06 2021 -0700

    trap: cleanup trap_init()

    There are some empty trap_init() definitions in different ARCHs, Introduce
    a new weak trap_init() function to clean them up.

    Link: https://lkml.kernel.org/r/20210812123602.76356-1-wangkefeng.wang@huawei.com
    Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
    Acked-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>    [arm32]
    Acked-by: Vineet Gupta                                          [arc]
    Acked-by: Michael Ellerman <mpe@ellerman.id.au>                 [powerpc]
    Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
    Cc: Ley Foon Tan <ley.foon.tan@intel.com>
    Cc: Jonas Bonn <jonas@southpole.se>
    Cc: Stefan Kristiansson <stefan.kristiansson@saunalahti.fi>
    Cc: Stafford Horne <shorne@gmail.com>
    Cc: James E.J. Bottomley <James.Bottomley@HansenPartnership.com>
    Cc: Helge Deller <deller@gmx.de>
    Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
    Cc: Paul Mackerras <paulus@samba.org>
    Cc: Paul Walmsley <palmerdabbelt@google.com>
    Cc: Jeff Dike <jdike@addtoit.com>
    Cc: Richard Weinberger <richard@nod.at>
    Cc: Anton Ivanov <anton.ivanov@cambridgegreys.com>
    Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
    Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Signed-off-by: Luis Claudio R. Goncalves <lgoncalv@redhat.com>

Author: lclaudio

arch/arc/kernel/traps.c

@@ -20,11 +20,6 @@
 #include <asm/unaligned.h>
 #include <asm/kprobes.h>
 
-void __init trap_init(void)
-{
-	return;
-}
-
 void die(const char *str, struct pt_regs *regs, unsigned long address)
 {
 	show_kernel_fault_diag(str, regs, address);

arch/arm/kernel/traps.c

@@ -781,11 +781,6 @@ void abort(void)
 	panic("Oops failed to kill thread");
 }
 
-void __init trap_init(void)
-{
-	return;
-}
-
 #ifdef CONFIG_KUSER_HELPERS
 static void __init kuser_init(void *vectors)
 {

arch/h8300/kernel/traps.c

@@ -40,10 +40,6 @@ void __init base_trap_init(void)
 {
 }
 
-void __init trap_init(void)
-{
-}
-
 asmlinkage void set_esp0(unsigned long ssp)
 {
 	current->thread.esp0 = ssp;

arch/hexagon/kernel/traps.c

@@ -28,10 +28,6 @@
 #define TRAP_SYSCALL	1
 #define TRAP_DEBUG	0xdb
 
-void __init trap_init(void)
-{
-}
-
 #ifdef CONFIG_GENERIC_BUG
 /* Maybe should resemble arch/sh/kernel/traps.c ?? */
 int is_valid_bugaddr(unsigned long addr)

arch/nds32/kernel/traps.c

@@ -183,11 +183,6 @@ void __pgd_error(const char *file, int line, unsigned long val)
 }
 
 extern char *exception_vector, *exception_vector_end;
-void __init trap_init(void)
-{
-	return;
-}
-
 void __init early_trap_init(void)
 {
 	unsigned long ivb = 0;

arch/nios2/kernel/traps.c

@@ -105,11 +105,6 @@ void show_stack(struct task_struct *task, unsigned long *stack,
 	printk("%s\n", loglvl);
 }
 
-void __init trap_init(void)
-{
-	/* Nothing to do here */
-}
-
 /* Breakpoint handler */
 asmlinkage void breakpoint_c(struct pt_regs *fp)
 {

arch/openrisc/kernel/traps.c

@@ -231,11 +231,6 @@ void unhandled_exception(struct pt_regs *regs, int ea, int vector)
 	die("Oops", regs, 9);
 }
 
-void __init trap_init(void)
-{
-	/* Nothing needs to be done */
-}
-
 asmlinkage void do_trap(struct pt_regs *regs, unsigned long address)
 {
 	force_sig_fault(SIGTRAP, TRAP_BRKPT, (void __user *)regs->pc);

arch/parisc/kernel/traps.c

@@ -859,7 +859,3 @@ void  __init early_trap_init(void)
 
 	initialize_ivt(&fault_vector_20);
 }
-
-void __init trap_init(void)
-{
-}

arch/powerpc/kernel/traps.c

@@ -2260,11 +2260,6 @@ DEFINE_INTERRUPT_HANDLER(kernel_bad_stack)
 	die("Bad kernel stack pointer", regs, SIGABRT);
 }
 
-void __init trap_init(void)
-{
-}
-
-
 #ifdef CONFIG_PPC_EMULATED_STATS
 
 #define WARN_EMULATED_SETUP(type)	.type = { .name = #type }

arch/riscv/kernel/traps.c

@@ -199,11 +199,6 @@ int is_valid_bugaddr(unsigned long pc)
 }
 #endif /* CONFIG_GENERIC_BUG */
 
-/* stvec & scratch is already set from head.S */
-void __init trap_init(void)
-{
-}
-
 #ifdef CONFIG_VMAP_STACK
 static DEFINE_PER_CPU(unsigned long [OVERFLOW_STACK_SIZE/sizeof(long)],
 		overflow_stack)__aligned(16);