linux-kernel - [PATCH 2/3] xen: remove unused function xen_set_domain

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Date:   Fri,  4 Aug 2017 13:36:12 +0200
From:   Juergen Gross <jgross@...e.com>
To:     linux-kernel@...r.kernel.org, xen-devel@...ts.xenproject.org
Cc:     boris.ostrovsky@...cle.com, Juergen Gross <jgross@...e.com>
Subject: [PATCH 2/3] xen: remove unused function xen_set_domain_pte()

The function xen_set_domain_pte() is used nowhere in the kernel.
Remove it.

Signed-off-by: Juergen Gross <jgross@...e.com>
---
 arch/x86/include/asm/xen/page.h |  2 --
 arch/x86/xen/mmu_pv.c           | 20 --------------------
 include/trace/events/xen.h      | 18 ------------------
 3 files changed, 40 deletions(-)

diff --git a/arch/x86/include/asm/xen/page.h b/arch/x86/include/asm/xen/page.h
index 497f7d28c1d6..07b6531813c4 100644
--- a/arch/x86/include/asm/xen/page.h
+++ b/arch/x86/include/asm/xen/page.h
@@ -314,8 +314,6 @@ static inline pte_t __pte_ma(pteval_t x)
 #define p4d_val_ma(x)	((x).p4d)
 #endif
 
-void xen_set_domain_pte(pte_t *ptep, pte_t pteval, unsigned domid);
-
 xmaddr_t arbitrary_virt_to_machine(void *address);
 unsigned long arbitrary_virt_to_mfn(void *vaddr);
 void make_lowmem_page_readonly(void *vaddr);
diff --git a/arch/x86/xen/mmu_pv.c b/arch/x86/xen/mmu_pv.c
index cab28cf2cffb..0422ee7e70b3 100644
--- a/arch/x86/xen/mmu_pv.c
+++ b/arch/x86/xen/mmu_pv.c
@@ -162,26 +162,6 @@ static bool xen_page_pinned(void *ptr)
 	return PagePinned(page);
 }
 
-void xen_set_domain_pte(pte_t *ptep, pte_t pteval, unsigned domid)
-{
-	struct multicall_space mcs;
-	struct mmu_update *u;
-
-	trace_xen_mmu_set_domain_pte(ptep, pteval, domid);
-
-	mcs = xen_mc_entry(sizeof(*u));
-	u = mcs.args;
-
-	/* ptep might be kmapped when using 32-bit HIGHPTE */
-	u->ptr = virt_to_machine(ptep).maddr;
-	u->val = pte_val_ma(pteval);
-
-	MULTI_mmu_update(mcs.mc, mcs.args, 1, NULL, domid);
-
-	xen_mc_issue(PARAVIRT_LAZY_MMU);
-}
-EXPORT_SYMBOL_GPL(xen_set_domain_pte);
-
 static void xen_extend_mmu_update(const struct mmu_update *update)
 {
 	struct multicall_space mcs;
diff --git a/include/trace/events/xen.h b/include/trace/events/xen.h
index b70a38b7fa84..677e8ac2bb81 100644
--- a/include/trace/events/xen.h
+++ b/include/trace/events/xen.h
@@ -149,24 +149,6 @@ DECLARE_EVENT_CLASS(xen_mmu__set_pte,
 DEFINE_XEN_MMU_SET_PTE(xen_mmu_set_pte);
 DEFINE_XEN_MMU_SET_PTE(xen_mmu_set_pte_atomic);
 
-TRACE_EVENT(xen_mmu_set_domain_pte,
-	    TP_PROTO(pte_t *ptep, pte_t pteval, unsigned domid),
-	    TP_ARGS(ptep, pteval, domid),
-	    TP_STRUCT__entry(
-		    __field(pte_t *, ptep)
-		    __field(pteval_t, pteval)
-		    __field(unsigned, domid)
-		    ),
-	    TP_fast_assign(__entry->ptep = ptep;
-			   __entry->pteval = pteval.pte;
-			   __entry->domid = domid),
-	    TP_printk("ptep %p pteval %0*llx (raw %0*llx) domid %u",
-		      __entry->ptep,
-		      (int)sizeof(pteval_t) * 2, (unsigned long long)pte_val(native_make_pte(__entry->pteval)),
-		      (int)sizeof(pteval_t) * 2, (unsigned long long)__entry->pteval,
-		      __entry->domid)
-	);
-
 TRACE_EVENT(xen_mmu_set_pte_at,
 	    TP_PROTO(struct mm_struct *mm, unsigned long addr,
 		     pte_t *ptep, pte_t pteval),
-- 
2.12.3