[PATCH 1/3] arch: Export machine_restart() instances so they can be called from modules

From: Lee Jones
Date: Tue Aug 03 2021 - 11:55:03 EST


A recent attempt to convert the Power Reset Restart driver to tristate
failed because of the following compile error (reported once merged by
Stephen Rothwell via Linux Next):

ERROR: "machine_restart" [drivers/power/reset/restart-poweroff.ko] undefined!

This error occurs since some of the machine_restart() instances are
not currently exported for use in modules. This patch aims to rectify
that.

Signed-off-by: Lee Jones <lee.jones@xxxxxxxxxx>
---

NB: If it's safe to omit some of these, let me know and I'll revise the patch.

arch/arc/kernel/reset.c | 1 +
arch/arm/kernel/reboot.c | 1 +
arch/arm64/kernel/process.c | 1 +
arch/csky/kernel/power.c | 1 +
arch/h8300/kernel/process.c | 1 +
arch/hexagon/kernel/reset.c | 1 +
arch/m68k/kernel/process.c | 1 +
arch/microblaze/kernel/reset.c | 1 +
arch/mips/kernel/reset.c | 1 +
arch/mips/lantiq/falcon/reset.c | 1 +
arch/mips/sgi-ip27/ip27-reset.c | 1 +
arch/nios2/kernel/process.c | 1 +
arch/openrisc/kernel/process.c | 1 +
arch/parisc/kernel/process.c | 1 +
arch/powerpc/kernel/setup-common.c | 1 +
arch/riscv/kernel/reset.c | 1 +
arch/s390/kernel/setup.c | 1 +
arch/sh/kernel/reboot.c | 1 +
arch/sparc/kernel/process_32.c | 1 +
arch/sparc/kernel/reboot.c | 1 +
arch/um/kernel/reboot.c | 1 +
arch/x86/kernel/reboot.c | 1 +
arch/xtensa/kernel/setup.c | 1 +
23 files changed, 23 insertions(+)

diff --git a/arch/arc/kernel/reset.c b/arch/arc/kernel/reset.c
index fd6c3eb930bad..ae4f8a43b0af4 100644
--- a/arch/arc/kernel/reset.c
+++ b/arch/arc/kernel/reset.c
@@ -20,6 +20,7 @@ void machine_restart(char *__unused)
pr_info("Put your restart handler here\n");
machine_halt();
}
+EXPORT_SYMBOL(machine_restart);

void machine_power_off(void)
{
diff --git a/arch/arm/kernel/reboot.c b/arch/arm/kernel/reboot.c
index 0ce388f154226..2878260efd130 100644
--- a/arch/arm/kernel/reboot.c
+++ b/arch/arm/kernel/reboot.c
@@ -150,3 +150,4 @@ void machine_restart(char *cmd)
printk("Reboot failed -- System halted\n");
while (1);
}
+EXPORT_SYMBOL(machine_restart);
diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c
index b4bb67f17a2ca..cf89ce91d7145 100644
--- a/arch/arm64/kernel/process.c
+++ b/arch/arm64/kernel/process.c
@@ -212,6 +212,7 @@ void machine_restart(char *cmd)
printk("Reboot failed -- System halted\n");
while (1);
}
+EXPORT_SYMBOL(machine_restart);

#define bstr(suffix, str) [PSR_BTYPE_ ## suffix >> PSR_BTYPE_SHIFT] = str
static const char *const btypes[] = {
diff --git a/arch/csky/kernel/power.c b/arch/csky/kernel/power.c
index 923ee4e381b81..b466c825cbb3c 100644
--- a/arch/csky/kernel/power.c
+++ b/arch/csky/kernel/power.c
@@ -28,3 +28,4 @@ void machine_restart(char *cmd)
do_kernel_restart(cmd);
asm volatile ("bkpt");
}
+EXPORT_SYMBOL(machine_restart);
diff --git a/arch/h8300/kernel/process.c b/arch/h8300/kernel/process.c
index 46b1342ce515b..8203ac5cd33ec 100644
--- a/arch/h8300/kernel/process.c
+++ b/arch/h8300/kernel/process.c
@@ -66,6 +66,7 @@ void machine_restart(char *__unused)
local_irq_disable();
__asm__("jmp @@0");
}
+EXPORT_SYMBOL(machine_restart);

void machine_halt(void)
{
diff --git a/arch/hexagon/kernel/reset.c b/arch/hexagon/kernel/reset.c
index da36114d928f0..433378d52063c 100644
--- a/arch/hexagon/kernel/reset.c
+++ b/arch/hexagon/kernel/reset.c
@@ -19,6 +19,7 @@ void machine_halt(void)
void machine_restart(char *cmd)
{
}
+EXPORT_SYMBOL(machine_restart);

void (*pm_power_off)(void) = NULL;
EXPORT_SYMBOL(pm_power_off);
diff --git a/arch/m68k/kernel/process.c b/arch/m68k/kernel/process.c
index da83cc83e7912..e0264704686e9 100644
--- a/arch/m68k/kernel/process.c
+++ b/arch/m68k/kernel/process.c
@@ -57,6 +57,7 @@ void machine_restart(char * __unused)
mach_reset();
for (;;);
}
+EXPORT_SYMBOL(machine_restart);

void machine_halt(void)
{
diff --git a/arch/microblaze/kernel/reset.c b/arch/microblaze/kernel/reset.c
index 5f4722908164d..902fbe3777846 100644
--- a/arch/microblaze/kernel/reset.c
+++ b/arch/microblaze/kernel/reset.c
@@ -41,3 +41,4 @@ void machine_restart(char *cmd)
pr_emerg("Reboot failed -- System halted\n");
while (1);
}
+EXPORT_SYMBOL(machine_restart);
diff --git a/arch/mips/kernel/reset.c b/arch/mips/kernel/reset.c
index 6288780b779e7..2d3193a3cf68b 100644
--- a/arch/mips/kernel/reset.c
+++ b/arch/mips/kernel/reset.c
@@ -99,6 +99,7 @@ void machine_restart(char *command)
pr_emerg("Reboot failed -- System halted\n");
machine_hang();
}
+EXPORT_SYMBOL(machine_restart);

void machine_halt(void)
{
diff --git a/arch/mips/lantiq/falcon/reset.c b/arch/mips/lantiq/falcon/reset.c
index 261996c230cf6..80dd9759ffa55 100644
--- a/arch/mips/lantiq/falcon/reset.c
+++ b/arch/mips/lantiq/falcon/reset.c
@@ -51,6 +51,7 @@ static void machine_restart(char *command)
(void *)WDT_REG_BASE);
unreachable();
}
+EXPORT_SYMBOL(machine_restart);

static void machine_halt(void)
{
diff --git a/arch/mips/sgi-ip27/ip27-reset.c b/arch/mips/sgi-ip27/ip27-reset.c
index 5ac5ad6387343..a3f8f4498b7c5 100644
--- a/arch/mips/sgi-ip27/ip27-reset.c
+++ b/arch/mips/sgi-ip27/ip27-reset.c
@@ -29,6 +29,7 @@
#include "ip27-common.h"

void machine_restart(char *command) __noreturn;
+EXPORT_SYMBOL(machine_restart);
void machine_halt(void) __noreturn;
void machine_power_off(void) __noreturn;

diff --git a/arch/nios2/kernel/process.c b/arch/nios2/kernel/process.c
index c5f916ca6845f..6f9459e8ae4ed 100644
--- a/arch/nios2/kernel/process.c
+++ b/arch/nios2/kernel/process.c
@@ -51,6 +51,7 @@ void machine_restart(char *__unused)
: "r" (cpuinfo.reset_addr)
: "r4");
}
+EXPORT_SYMBOL(machine_restart);

void machine_halt(void)
{
diff --git a/arch/openrisc/kernel/process.c b/arch/openrisc/kernel/process.c
index eb62429681fc8..12c3022c46387 100644
--- a/arch/openrisc/kernel/process.c
+++ b/arch/openrisc/kernel/process.c
@@ -61,6 +61,7 @@ void machine_restart(char *cmd)
pr_emerg("Reboot failed -- System halted\n");
while (1);
}
+EXPORT_SYMBOL(machine_restart);

/*
* Similar to machine_power_off, but don't shut off power. Add code
diff --git a/arch/parisc/kernel/process.c b/arch/parisc/kernel/process.c
index b144fbe29bc16..05e9f03124b64 100644
--- a/arch/parisc/kernel/process.c
+++ b/arch/parisc/kernel/process.c
@@ -96,6 +96,7 @@ void machine_restart(char *cmd)
while (1) ;

}
+EXPORT_SYMBOL(machine_restart);

void (*chassis_power_off)(void);

diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c
index 74a98fff2c2f9..54ebae540dd7d 100644
--- a/arch/powerpc/kernel/setup-common.c
+++ b/arch/powerpc/kernel/setup-common.c
@@ -159,6 +159,7 @@ void machine_restart(char *cmd)

machine_hang();
}
+EXPORT_SYMBOL(machine_restart);

void machine_power_off(void)
{
diff --git a/arch/riscv/kernel/reset.c b/arch/riscv/kernel/reset.c
index ee5878d968cc1..596a36b91eaa2 100644
--- a/arch/riscv/kernel/reset.c
+++ b/arch/riscv/kernel/reset.c
@@ -20,6 +20,7 @@ void machine_restart(char *cmd)
do_kernel_restart(cmd);
while (1);
}
+EXPORT_SYMBOL(machine_restart);

void machine_halt(void)
{
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index 5aab59ad56881..fd2394af0d43a 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -276,6 +276,7 @@ void machine_restart(char *command)
console_unblank();
_machine_restart(command);
}
+EXPORT_SYMBOL(machine_restart);

void machine_halt(void)
{
diff --git a/arch/sh/kernel/reboot.c b/arch/sh/kernel/reboot.c
index 5c33f036418be..36b6c61f3b129 100644
--- a/arch/sh/kernel/reboot.c
+++ b/arch/sh/kernel/reboot.c
@@ -83,6 +83,7 @@ void machine_restart(char *cmd)
{
machine_ops.restart(cmd);
}
+EXPORT_SYMBOL(machine_restart);

void machine_halt(void)
{
diff --git a/arch/sparc/kernel/process_32.c b/arch/sparc/kernel/process_32.c
index 3b9794978e5bc..30a1674683946 100644
--- a/arch/sparc/kernel/process_32.c
+++ b/arch/sparc/kernel/process_32.c
@@ -104,6 +104,7 @@ void machine_restart(char * cmd)
prom_feval ("reset");
panic("Reboot failed!");
}
+EXPORT_SYMBOL(machine_restart);

void machine_power_off(void)
{
diff --git a/arch/sparc/kernel/reboot.c b/arch/sparc/kernel/reboot.c
index 69c1b6c047d53..53adef425d7de 100644
--- a/arch/sparc/kernel/reboot.c
+++ b/arch/sparc/kernel/reboot.c
@@ -52,4 +52,5 @@ void machine_restart(char *cmd)
prom_reboot("");
panic("Reboot failed!");
}
+EXPORT_SYMBOL(machine_restart);

diff --git a/arch/um/kernel/reboot.c b/arch/um/kernel/reboot.c
index 48c0610d506e0..4b764311efb89 100644
--- a/arch/um/kernel/reboot.c
+++ b/arch/um/kernel/reboot.c
@@ -47,6 +47,7 @@ void machine_restart(char * __unused)
uml_cleanup();
reboot_skas();
}
+EXPORT_SYMBOL(machine_restart);

void machine_power_off(void)
{
diff --git a/arch/x86/kernel/reboot.c b/arch/x86/kernel/reboot.c
index b29657b76e3fa..b48c30ead7167 100644
--- a/arch/x86/kernel/reboot.c
+++ b/arch/x86/kernel/reboot.c
@@ -733,6 +733,7 @@ static void native_machine_restart(char *__unused)
machine_shutdown();
__machine_emergency_restart(0);
}
+EXPORT_SYMBOL(machine_restart);

static void native_machine_halt(void)
{
diff --git a/arch/xtensa/kernel/setup.c b/arch/xtensa/kernel/setup.c
index ed184106e4cf9..a84cc934300d5 100644
--- a/arch/xtensa/kernel/setup.c
+++ b/arch/xtensa/kernel/setup.c
@@ -564,6 +564,7 @@ void machine_restart(char * cmd)
{
platform_restart();
}
+EXPORT_SYMBOL(machine_restart);

void machine_halt(void)
{
--
2.32.0.554.ge1b32706d8-goog