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x86: xen: add missing prototypes 

These function are all called from assembler files, or from inline
assembler, so there is no immediate need for a prototype in a header,
but if -Wmissing-prototypes is enabled, the compiler warns about them:

arch/x86/xen/efi.c:130:13: error: no previous prototype for 'xen_efi_init' [-Werror=missing-prototypes]
arch/x86/platform/pvh/enlighten.c:120:13: error: no previous prototype for 'xen_prepare_pvh' [-Werror=missing-prototypes]
arch/x86/xen/enlighten_pv.c:1233:34: error: no previous prototype for 'xen_start_kernel' [-Werror=missing-prototypes]
arch/x86/xen/irq.c:22:14: error: no previous prototype for 'xen_force_evtchn_callback' [-Werror=missing-prototypes]
arch/x86/entry/common.c:302:24: error: no previous prototype for 'xen_pv_evtchn_do_upcall' [-Werror=missing-prototypes]

Declare all of them in an appropriate header file to avoid the warnings.
For consistency, also move the asm_cpu_bringup_and_idle() declaration
out of smp_pv.c.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Link: https://lore.kernel.org/r/20230614073501.10101-3-jgross@suse.com
Signed-off-by: Juergen Gross <jgross@suse.com>
This commit is contained in:
Arnd Bergmann 2023-06-14 09:35:01 +02:00 committed by Juergen Gross
parent 3d013424de
commit fb9b7b4b2b
5 changed files with 12 additions and 1 deletions
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2
arch/x86/xen/efi.c
View File

@ -16,6 +16,8 @@
#include <asm/setup.h>
#include <asm/xen/hypercall.h>
#include "xen-ops.h"
static efi_char16_t vendor[100] __initdata;
static efi_system_table_t efi_systab_xen __initdata = {

4
arch/x86/xen/smp.h
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@ -2,6 +2,10 @@
#ifndef _XEN_SMP_H
#ifdef CONFIG_SMP
void asm_cpu_bringup_and_idle(void);
asmlinkage void cpu_bringup_and_idle(void);
extern void xen_send_IPI_mask(const struct cpumask *mask,
int vector);
extern void xen_send_IPI_mask_allbutself(const struct cpumask *mask,

1
arch/x86/xen/smp_pv.c
View File

@ -55,7 +55,6 @@ static DEFINE_PER_CPU(struct xen_common_irq, xen_irq_work) = { .irq = -1 };
static DEFINE_PER_CPU(struct xen_common_irq, xen_pmu_irq) = { .irq = -1 };
static irqreturn_t xen_irq_work_interrupt(int irq, void *dev_id);
void asm_cpu_bringup_and_idle(void);
static void cpu_bringup(void)
{

3
arch/x86/xen/xen-ops.h
View File

@ -146,9 +146,12 @@ int xen_cpuhp_setup(int (*cpu_up_prepare_cb)(unsigned int),
void xen_pin_vcpu(int cpu);
void xen_emergency_restart(void);
void xen_force_evtchn_callback(void);
#ifdef CONFIG_XEN_PV
void xen_pv_pre_suspend(void);
void xen_pv_post_suspend(int suspend_cancelled);
void xen_start_kernel(struct start_info *si);
#else
static inline void xen_pv_pre_suspend(void) {}
static inline void xen_pv_post_suspend(int suspend_cancelled) {}

3
include/xen/xen.h
View File

@ -31,6 +31,9 @@ extern uint32_t xen_start_flags;
#include <xen/interface/hvm/start_info.h>
extern struct hvm_start_info pvh_start_info;
void xen_prepare_pvh(void);
struct pt_regs;
void xen_pv_evtchn_do_upcall(struct pt_regs *regs);
#ifdef CONFIG_XEN_DOM0
#include <xen/interface/xen.h>