[xen stable-4.16] xen/x86: Remove the use of K&R functions

[patchbot@xxxxxxx]

commit 2b12f64f87b326e9434b09f249af5e8b1e287e24
Author:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
AuthorDate: Mon Jul 17 09:41:22 2023 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Mon Jul 17 09:41:22 2023 +0200

    xen/x86: Remove the use of K&R functions
    
    Clang-15 (as seen in the FreeBSD 14 tests) complains:
    
      arch/x86/time.c:1364:20: error: a function declaration without a
      prototype is deprecated in all versions of C [-Werror,-Wstrict-prototypes]
      s_time_t get_s_time()
                         ^
                          void
    
    The error message is a bit confusing but appears to new as part of
    -Wdeprecated-non-prototype which is part of supporting C2x which formally
    removes K&R syntax.
    
    Either way, fix the identified functions.
    
    Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
    Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>
    
    Backport: Also deal with powernow_register_driver() and flush_all_cache().
    
    master commit: 22b2fa4766728c3057757c00e79da5f7803fff33
    master date: 2023-02-17 11:01:54 +0000
---
 xen/arch/x86/acpi/cpufreq/powernow.c  | 2 +-
 xen/arch/x86/hvm/vmx/vmcs.c           | 2 +-
 xen/arch/x86/time.c                   | 2 +-
 xen/drivers/passthrough/iommu.c       | 4 ++--
 xen/drivers/passthrough/vtd/x86/vtd.c | 2 +-
 5 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/xen/arch/x86/acpi/cpufreq/powernow.c 
b/xen/arch/x86/acpi/cpufreq/powernow.c
index f620bebc7e..b17dc612ff 100644
--- a/xen/arch/x86/acpi/cpufreq/powernow.c
+++ b/xen/arch/x86/acpi/cpufreq/powernow.c
@@ -353,7 +353,7 @@ static const struct cpufreq_driver __initconstrel 
powernow_cpufreq_driver = {
     .update = powernow_cpufreq_update
 };
 
-unsigned int __init powernow_register_driver()
+unsigned int __init powernow_register_driver(void)
 {
     unsigned int i, ret = 0;
 
diff --git a/xen/arch/x86/hvm/vmx/vmcs.c b/xen/arch/x86/hvm/vmx/vmcs.c
index 237b13459d..c2a1d7280d 100644
--- a/xen/arch/x86/hvm/vmx/vmcs.c
+++ b/xen/arch/x86/hvm/vmx/vmcs.c
@@ -774,7 +774,7 @@ static int _vmx_cpu_up(bool bsp)
     return 0;
 }
 
-int vmx_cpu_up()
+int vmx_cpu_up(void)
 {
     return _vmx_cpu_up(false);
 }
diff --git a/xen/arch/x86/time.c b/xen/arch/x86/time.c
index db0b149ec6..3fceb9a468 100644
--- a/xen/arch/x86/time.c
+++ b/xen/arch/x86/time.c
@@ -1265,7 +1265,7 @@ s_time_t get_s_time_fixed(u64 at_tsc)
     return t->stamp.local_stime + scale_delta(delta, &t->tsc_scale);
 }
 
-s_time_t get_s_time()
+s_time_t get_s_time(void)
 {
     return get_s_time_fixed(0);
 }
diff --git a/xen/drivers/passthrough/iommu.c b/xen/drivers/passthrough/iommu.c
index 287f63fc73..7d69b1134b 100644
--- a/xen/drivers/passthrough/iommu.c
+++ b/xen/drivers/passthrough/iommu.c
@@ -515,7 +515,7 @@ int __init iommu_setup(void)
     return rc;
 }
 
-int iommu_suspend()
+int iommu_suspend(void)
 {
     if ( iommu_enabled )
         return iommu_get_ops()->suspend();
@@ -523,7 +523,7 @@ int iommu_suspend()
     return 0;
 }
 
-void iommu_resume()
+void iommu_resume(void)
 {
     if ( iommu_enabled )
         iommu_get_ops()->resume();
diff --git a/xen/drivers/passthrough/vtd/x86/vtd.c 
b/xen/drivers/passthrough/vtd/x86/vtd.c
index 55f0faa521..2665114f70 100644
--- a/xen/drivers/passthrough/vtd/x86/vtd.c
+++ b/xen/drivers/passthrough/vtd/x86/vtd.c
@@ -47,7 +47,7 @@ void unmap_vtd_domain_page(const void *va)
     unmap_domain_page(va);
 }
 
-void flush_all_cache()
+void flush_all_cache(void)
 {
     wbinvd();
 }
--
generated by git-patchbot for /home/xen/git/xen.git#stable-4.16