Re: [PATCH] [v3] x86: xen: add missing prototypes
On 23.05.23 22:56, Arnd Bergmann wrote:
From: Arnd Bergmann
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/mmu_pv.c:358:20: error: no previous prototype for 'xen_pte_val'
[-Werror=missing-prototypes]
arch/x86/xen/mmu_pv.c:366:20: error: no previous prototype for 'xen_pgd_val'
[-Werror=missing-prototypes]
arch/x86/xen/mmu_pv.c:372:17: error: no previous prototype for 'xen_make_pte'
[-Werror=missing-prototypes]
arch/x86/xen/mmu_pv.c:380:17: error: no previous prototype for 'xen_make_pgd'
[-Werror=missing-prototypes]
arch/x86/xen/mmu_pv.c:387:20: error: no previous prototype for 'xen_pmd_val'
[-Werror=missing-prototypes]
arch/x86/xen/mmu_pv.c:425:17: error: no previous prototype for 'xen_make_pmd'
[-Werror=missing-prototypes]
arch/x86/xen/mmu_pv.c:432:20: error: no previous prototype for 'xen_pud_val'
[-Werror=missing-prototypes]
arch/x86/xen/mmu_pv.c:438:17: error: no previous prototype for 'xen_make_pud'
[-Werror=missing-prototypes]
arch/x86/xen/mmu_pv.c:522:20: error: no previous prototype for 'xen_p4d_val'
[-Werror=missing-prototypes]
arch/x86/xen/mmu_pv.c:528:17: error: no previous prototype for 'xen_make_p4d'
[-Werror=missing-prototypes]
arch/x86/xen/mmu_pv.c:1442:17: error: no previous prototype for
'xen_make_pte_init' [-Werror=missing-prototypes]
I'd suggest to add the prototypes of the functions defined in
arch/x86/xen/mmu_pv.c to the same source, as they are referenced
nowhere else. This avoids the need of #ifdefs for those functions.
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
---
v3: move declations of conditional function in an #ifdef with a stub
v2: fix up changelog
---
arch/x86/xen/efi.c | 2 ++
arch/x86/xen/smp.h | 11 +++
arch/x86/xen/smp_pv.c | 1 -
arch/x86/xen/xen-ops.h | 26 ++
include/xen/xen.h | 3 +++
5 files changed, 42 insertions(+), 1 deletion(-)
diff --git a/arch/x86/xen/efi.c b/arch/x86/xen/efi.c
index 7d7ffb9c826a..863d0d6b3edc 100644
--- a/arch/x86/xen/efi.c
+++ b/arch/x86/xen/efi.c
@@ -16,6 +16,8 @@
#include
#include
+#include "xen-ops.h"
+
static efi_char16_t vendor[100] __initdata;
static efi_system_table_t efi_systab_xen __initdata = {
diff --git a/arch/x86/xen/smp.h b/arch/x86/xen/smp.h
index 22fb982ff971..9367502281dc 100644
--- a/arch/x86/xen/smp.h
+++ b/arch/x86/xen/smp.h
@@ -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,
@@ -29,6 +33,13 @@ struct xen_common_irq {
};
#else /* CONFIG_SMP */
+static inline void asm_cpu_bringup_and_idle(void)
+{
+}
+static inline void cpu_bringup_and_idle(void)
+{
+}
+
No need for above stubs, as there is no way they can get called
without CONFIG_SMP.
static inline int xen_smp_intr_init(unsigned int cpu)
{
return 0;
diff --git a/arch/x86/xen/smp_pv.c b/arch/x86/xen/smp_pv.c
index a92e8002b5cf..d5ae5de2daa2 100644
--- a/arch/x86/xen/smp_pv.c
+++ b/arch/x86/xen/smp_pv.c
@@ -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)
{
diff --git a/arch/x86/xen/xen-ops.h b/arch/x86/xen/xen-ops.h
index 6d7f6318fc07..eb4cb30570c7 100644
--- a/arch/x86/xen/xen-ops.h
+++ b/arch/x86/xen/xen-ops.h
@@ -146,12 +146,38 @@ 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);
+pteval_t xen_pte_val(pte_t pte);
+pgdval_t xen_pgd_val(pgd_t pgd);
+pmdval_t xen_pmd_val(pmd_t pmd);
+pudval_t xen_pud_val(pud_t
[PATCH] [v3] x86: xen: add missing prototypes
From: Arnd Bergmann
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/mmu_pv.c:358:20: error: no previous prototype for 'xen_pte_val'
[-Werror=missing-prototypes]
arch/x86/xen/mmu_pv.c:366:20: error: no previous prototype for 'xen_pgd_val'
[-Werror=missing-prototypes]
arch/x86/xen/mmu_pv.c:372:17: error: no previous prototype for 'xen_make_pte'
[-Werror=missing-prototypes]
arch/x86/xen/mmu_pv.c:380:17: error: no previous prototype for 'xen_make_pgd'
[-Werror=missing-prototypes]
arch/x86/xen/mmu_pv.c:387:20: error: no previous prototype for 'xen_pmd_val'
[-Werror=missing-prototypes]
arch/x86/xen/mmu_pv.c:425:17: error: no previous prototype for 'xen_make_pmd'
[-Werror=missing-prototypes]
arch/x86/xen/mmu_pv.c:432:20: error: no previous prototype for 'xen_pud_val'
[-Werror=missing-prototypes]
arch/x86/xen/mmu_pv.c:438:17: error: no previous prototype for 'xen_make_pud'
[-Werror=missing-prototypes]
arch/x86/xen/mmu_pv.c:522:20: error: no previous prototype for 'xen_p4d_val'
[-Werror=missing-prototypes]
arch/x86/xen/mmu_pv.c:528:17: error: no previous prototype for 'xen_make_p4d'
[-Werror=missing-prototypes]
arch/x86/xen/mmu_pv.c:1442:17: error: no previous prototype for
'xen_make_pte_init' [-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
---
v3: move declations of conditional function in an #ifdef with a stub
v2: fix up changelog
---
arch/x86/xen/efi.c | 2 ++
arch/x86/xen/smp.h | 11 +++
arch/x86/xen/smp_pv.c | 1 -
arch/x86/xen/xen-ops.h | 26 ++
include/xen/xen.h | 3 +++
5 files changed, 42 insertions(+), 1 deletion(-)
diff --git a/arch/x86/xen/efi.c b/arch/x86/xen/efi.c
index 7d7ffb9c826a..863d0d6b3edc 100644
--- a/arch/x86/xen/efi.c
+++ b/arch/x86/xen/efi.c
@@ -16,6 +16,8 @@
#include
#include
+#include "xen-ops.h"
+
static efi_char16_t vendor[100] __initdata;
static efi_system_table_t efi_systab_xen __initdata = {
diff --git a/arch/x86/xen/smp.h b/arch/x86/xen/smp.h
index 22fb982ff971..9367502281dc 100644
--- a/arch/x86/xen/smp.h
+++ b/arch/x86/xen/smp.h
@@ -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,
@@ -29,6 +33,13 @@ struct xen_common_irq {
};
#else /* CONFIG_SMP */
+static inline void asm_cpu_bringup_and_idle(void)
+{
+}
+static inline void cpu_bringup_and_idle(void)
+{
+}
+
static inline int xen_smp_intr_init(unsigned int cpu)
{
return 0;
diff --git a/arch/x86/xen/smp_pv.c b/arch/x86/xen/smp_pv.c
index a92e8002b5cf..d5ae5de2daa2 100644
--- a/arch/x86/xen/smp_pv.c
+++ b/arch/x86/xen/smp_pv.c
@@ -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)
{
diff --git a/arch/x86/xen/xen-ops.h b/arch/x86/xen/xen-ops.h
index 6d7f6318fc07..eb4cb30570c7 100644
--- a/arch/x86/xen/xen-ops.h
+++ b/arch/x86/xen/xen-ops.h
@@ -146,12 +146,38 @@ 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);
+pteval_t xen_pte_val(pte_t pte);
+pgdval_t xen_pgd_val(pgd_t pgd);
+pmdval_t xen_pmd_val(pmd_t pmd);
+pudval_t xen_pud_val(pud_t pud);
+p4dval_t xen_p4d_val(p4d_t p4d);
+pte_t xen_make_pte(pteval_t pte);
+pgd_t xen_make_pgd(pgdval_t pgd);
+pmd_t xen_make_pmd(pmdval_t pmd);
+pud_t xen_make_pud(pudval_t pud);
+p4d_t xen_make_p4d(p4dval_t p4d);
+pte_t xen_make_pte_init(pteval_t pte);
+void xen_start_kernel(struct start_info *si);
#else
static inline void xen_pv_pre_suspend(void) {}
static inline
