[PATCH v4 16/20] xen/sysctl: wrap around XEN_SYSCTL_physinfo

[Penny Zheng <Penny.Zheng@amd.com>]

The following functions are only used to deal with XEN_SYSCTL_physinfo,
then they shall be wrapped:
- arch_do_physinfo()
- get_outstanding_claims()

Signed-off-by: Penny Zheng <Penny.Zheng@amd.com>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
Acked-by: Jan Beulich <jbeulich@suse.com>
---
v1 -> v2:
- no need to wrap declaration
- add transient #ifdef in sysctl.c for correct compilation
---
v2 -> v3:
- move #endif up ahead of the blank line
---
v3 -> v4:
- remove transient "#ifdef CONFIG_SYSCTL"
---
 xen/arch/arm/sysctl.c   | 2 ++
 xen/arch/riscv/stubs.c  | 2 ++
 xen/arch/x86/sysctl.c   | 2 ++
 xen/common/page_alloc.c | 2 ++
 4 files changed, 8 insertions(+)

diff --git a/xen/arch/arm/sysctl.c b/xen/arch/arm/sysctl.c
index 32cab4feff..2d350b700a 100644
--- a/xen/arch/arm/sysctl.c
+++ b/xen/arch/arm/sysctl.c
@@ -15,6 +15,7 @@
 #include <asm/arm64/sve.h>
 #include <public/sysctl.h>
 
+#ifdef CONFIG_SYSCTL
 void arch_do_physinfo(struct xen_sysctl_physinfo *pi)
 {
     pi->capabilities |= XEN_SYSCTL_PHYSCAP_hvm | XEN_SYSCTL_PHYSCAP_hap;
@@ -22,6 +23,7 @@ void arch_do_physinfo(struct xen_sysctl_physinfo *pi)
     pi->arch_capabilities |= MASK_INSR(sve_encode_vl(get_sys_vl_len()),
                                        XEN_SYSCTL_PHYSCAP_ARM_SVE_MASK);
 }
+#endif
 
 long arch_do_sysctl(struct xen_sysctl *sysctl,
                     XEN_GUEST_HANDLE_PARAM(xen_sysctl_t) u_sysctl)
diff --git a/xen/arch/riscv/stubs.c b/xen/arch/riscv/stubs.c
index 83416d3350..295456d0c8 100644
--- a/xen/arch/riscv/stubs.c
+++ b/xen/arch/riscv/stubs.c
@@ -321,10 +321,12 @@ long arch_do_sysctl(struct xen_sysctl *sysctl,
     BUG_ON("unimplemented");
 }
 
+#ifdef CONFIG_SYSCTL
 void arch_do_physinfo(struct xen_sysctl_physinfo *pi)
 {
     BUG_ON("unimplemented");
 }
+#endif /* CONFIG_SYSCTL */
 
 /* p2m.c */
 
diff --git a/xen/arch/x86/sysctl.c b/xen/arch/x86/sysctl.c
index 1b04947516..f64addbe2b 100644
--- a/xen/arch/x86/sysctl.c
+++ b/xen/arch/x86/sysctl.c
@@ -91,6 +91,7 @@ static long cf_check smt_up_down_helper(void *data)
     return ret;
 }
 
+#ifdef CONFIG_SYSCTL
 void arch_do_physinfo(struct xen_sysctl_physinfo *pi)
 {
     memcpy(pi->hw_cap, boot_cpu_data.x86_capability,
@@ -104,6 +105,7 @@ void arch_do_physinfo(struct xen_sysctl_physinfo *pi)
     if ( IS_ENABLED(CONFIG_SHADOW_PAGING) )
         pi->capabilities |= XEN_SYSCTL_PHYSCAP_shadow;
 }
+#endif /* CONFIG_SYSCTL */
 
 long arch_do_sysctl(
     struct xen_sysctl *sysctl, XEN_GUEST_HANDLE_PARAM(xen_sysctl_t) u_sysctl)
diff --git a/xen/common/page_alloc.c b/xen/common/page_alloc.c
index dec4cb2ab1..8177d12f50 100644
--- a/xen/common/page_alloc.c
+++ b/xen/common/page_alloc.c
@@ -601,6 +601,7 @@ out:
     return ret;
 }
 
+#ifdef CONFIG_SYSCTL
 void get_outstanding_claims(uint64_t *free_pages, uint64_t *outstanding_pages)
 {
     spin_lock(&heap_lock);
@@ -608,6 +609,7 @@ void get_outstanding_claims(uint64_t *free_pages, uint64_t *outstanding_pages)
     *free_pages = avail_heap_pages(MEMZONE_XEN + 1, NR_ZONES - 1, -1);
     spin_unlock(&heap_lock);
 }
+#endif /* CONFIG_SYSCTL */
 
 static bool __read_mostly first_node_initialised;
 #ifndef CONFIG_SEPARATE_XENHEAP
-- 
2.34.1