xen: add xen_ prefixes to make tracing with ftrace easier

It's easier to pattern match on Xen function if they all start with xen_.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 34 insertions, 32 deletions

diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index d3752b6ce6e6..d9a35a363095 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -229,14 +229,14 @@ void make_lowmem_page_readwrite(void *vaddr)
 }
 
 
-static bool page_pinned(void *ptr)
+static bool xen_page_pinned(void *ptr)
 {
         struct page *page = virt_to_page(ptr);
 
         return PagePinned(page);
 }
 
-static void extend_mmu_update(const struct mmu_update *update)
+static void xen_extend_mmu_update(const struct mmu_update *update)
 {
         struct multicall_space mcs;
         struct mmu_update *u;
@@ -265,7 +265,7 @@ void xen_set_pmd_hyper(pmd_t *ptr, pmd_t val)
         /* ptr may be ioremapped for 64-bit pagetable setup */
         u.ptr = arbitrary_virt_to_machine(ptr).maddr;
         u.val = pmd_val_ma(val);
-        extend_mmu_update(&u);
+        xen_extend_mmu_update(&u);
 
         xen_mc_issue(PARAVIRT_LAZY_MMU);
 
@@ -276,7 +276,7 @@ void xen_set_pmd(pmd_t *ptr, pmd_t val)
 {
         /* If page is not pinned, we can just update the entry
            directly */
-        if (!page_pinned(ptr)) {
+        if (!xen_page_pinned(ptr)) {
                 *ptr = val;
                 return;
         }
@@ -334,7 +334,7 @@ void xen_ptep_modify_prot_commit(struct mm_struct *mm, unsigned long addr,
 
         u.ptr = virt_to_machine(ptep).maddr | MMU_PT_UPDATE_PRESERVE_AD;
         u.val = pte_val_ma(pte);
-        extend_mmu_update(&u);
+        xen_extend_mmu_update(&u);
 
         xen_mc_issue(PARAVIRT_LAZY_MMU);
 }
@@ -400,7 +400,7 @@ void xen_set_pud_hyper(pud_t *ptr, pud_t val)
         /* ptr may be ioremapped for 64-bit pagetable setup */
         u.ptr = arbitrary_virt_to_machine(ptr).maddr;
         u.val = pud_val_ma(val);
-        extend_mmu_update(&u);
+        xen_extend_mmu_update(&u);
 
         xen_mc_issue(PARAVIRT_LAZY_MMU);
 
@@ -411,7 +411,7 @@ void xen_set_pud(pud_t *ptr, pud_t val)
 {
         /* If page is not pinned, we can just update the entry
            directly */
-        if (!page_pinned(ptr)) {
+        if (!xen_page_pinned(ptr)) {
                 *ptr = val;
                 return;
         }
@@ -490,7 +490,7 @@ static void __xen_set_pgd_hyper(pgd_t *ptr, pgd_t val)
 
         u.ptr = virt_to_machine(ptr).maddr;
         u.val = pgd_val_ma(val);
-        extend_mmu_update(&u);
+        xen_extend_mmu_update(&u);
 }
 
 /*
@@ -519,10 +519,10 @@ void xen_set_pgd(pgd_t *ptr, pgd_t val)
 
         /* If page is not pinned, we can just update the entry
            directly */
-        if (!page_pinned(ptr)) {
+        if (!xen_page_pinned(ptr)) {
                 *ptr = val;
                 if (user_ptr) {
-                        WARN_ON(page_pinned(user_ptr));
+                        WARN_ON(xen_page_pinned(user_ptr));
                         *user_ptr = val;
                 }
                 return;
@@ -555,8 +555,8 @@ void xen_set_pgd(pgd_t *ptr, pgd_t val)
  * For 64-bit, we must skip the Xen hole in the middle of the address
  * space, just after the big x86-64 virtual hole.
  */
-static int pgd_walk(pgd_t *pgd, int (*func)(struct page *, enum pt_level),
-                    unsigned long limit)
+static int xen_pgd_walk(pgd_t *pgd, int (*func)(struct page *, enum pt_level),
+                        unsigned long limit)
 {
         int flush = 0;
         unsigned hole_low, hole_high;
@@ -644,7 +644,9 @@ out:
         return flush;
 }
 
-static spinlock_t *lock_pte(struct page *page)
+/* If we're using split pte locks, then take the page's lock and
+   return a pointer to it.  Otherwise return NULL. */
+static spinlock_t *xen_pte_lock(struct page *page)
 {
         spinlock_t *ptl = NULL;
 
@@ -656,7 +658,7 @@ static spinlock_t *lock_pte(struct page *page)
         return ptl;
 }
 
-static void do_unlock(void *v)
+static void xen_pte_unlock(void *v)
 {
         spinlock_t *ptl = v;
         spin_unlock(ptl);
@@ -674,7 +676,7 @@ static void xen_do_pin(unsigned level, unsigned long pfn)
         MULTI_mmuext_op(mcs.mc, op, 1, NULL, DOMID_SELF);
 }
 
-static int pin_page(struct page *page, enum pt_level level)
+static int xen_pin_page(struct page *page, enum pt_level level)
 {
         unsigned pgfl = TestSetPagePinned(page);
         int flush;
@@ -715,7 +717,7 @@ static int pin_page(struct page *page, enum pt_level level)
                  */
                 ptl = NULL;
                 if (level == PT_PTE)
-                        ptl = lock_pte(page);
+                        ptl = xen_pte_lock(page);
 
                 MULTI_update_va_mapping(mcs.mc, (unsigned long)pt,
                                         pfn_pte(pfn, PAGE_KERNEL_RO),
@@ -726,7 +728,7 @@ static int pin_page(struct page *page, enum pt_level level)
 
                         /* Queue a deferred unlock for when this batch
                            is completed. */
-                        xen_mc_callback(do_unlock, ptl);
+                        xen_mc_callback(xen_pte_unlock, ptl);
                 }
         }
 
@@ -740,7 +742,7 @@ void xen_pgd_pin(pgd_t *pgd)
 {
         xen_mc_batch();
 
-        if (pgd_walk(pgd, pin_page, USER_LIMIT)) {
+        if (xen_pgd_walk(pgd, xen_pin_page, USER_LIMIT)) {
                 /* re-enable interrupts for kmap_flush_unused */
                 xen_mc_issue(0);
                 kmap_flush_unused();
@@ -754,14 +756,14 @@ void xen_pgd_pin(pgd_t *pgd)
                 xen_do_pin(MMUEXT_PIN_L4_TABLE, PFN_DOWN(__pa(pgd)));
 
                 if (user_pgd) {
-                        pin_page(virt_to_page(user_pgd), PT_PGD);
+                        xen_pin_page(virt_to_page(user_pgd), PT_PGD);
                         xen_do_pin(MMUEXT_PIN_L4_TABLE, PFN_DOWN(__pa(user_pgd)));
                 }
         }
 #else /* CONFIG_X86_32 */
 #ifdef CONFIG_X86_PAE
         /* Need to make sure unshared kernel PMD is pinnable */
-        pin_page(virt_to_page(pgd_page(pgd[pgd_index(TASK_SIZE)])), PT_PMD);
+        xen_pin_page(virt_to_page(pgd_page(pgd[pgd_index(TASK_SIZE)])), PT_PMD);
 #endif
         xen_do_pin(MMUEXT_PIN_L3_TABLE, PFN_DOWN(__pa(pgd)));
 #endif /* CONFIG_X86_64 */
@@ -796,7 +798,7 @@ void xen_mm_pin_all(void)
  * that's before we have page structures to store the bits.  So do all
  * the book-keeping now.
  */
-static __init int mark_pinned(struct page *page, enum pt_level level)
+static __init int xen_mark_pinned(struct page *page, enum pt_level level)
 {
         SetPagePinned(page);
         return 0;
@@ -804,10 +806,10 @@ static __init int mark_pinned(struct page *page, enum pt_level level)
 
 void __init xen_mark_init_mm_pinned(void)
 {
-        pgd_walk(init_mm.pgd, mark_pinned, FIXADDR_TOP);
+        xen_pgd_walk(init_mm.pgd, xen_mark_pinned, FIXADDR_TOP);
 }
 
-static int unpin_page(struct page *page, enum pt_level level)
+static int xen_unpin_page(struct page *page, enum pt_level level)
 {
         unsigned pgfl = TestClearPagePinned(page);
 
@@ -825,7 +827,7 @@ static int unpin_page(struct page *page, enum pt_level level)
                  * partially-pinned state.
                  */
                 if (level == PT_PTE) {
-                        ptl = lock_pte(page);
+                        ptl = xen_pte_lock(page);
 
                         if (ptl)
                                 xen_do_pin(MMUEXT_UNPIN_TABLE, pfn);
@@ -839,7 +841,7 @@ static int unpin_page(struct page *page, enum pt_level level)
 
                 if (ptl) {
                         /* unlock when batch completed */
-                        xen_mc_callback(do_unlock, ptl);
+                        xen_mc_callback(xen_pte_unlock, ptl);
                 }
         }
 
@@ -859,17 +861,17 @@ static void xen_pgd_unpin(pgd_t *pgd)
 
                 if (user_pgd) {
                         xen_do_pin(MMUEXT_UNPIN_TABLE, PFN_DOWN(__pa(user_pgd)));
-                        unpin_page(virt_to_page(user_pgd), PT_PGD);
+                        xen_unpin_page(virt_to_page(user_pgd), PT_PGD);
                 }
         }
 #endif
 
 #ifdef CONFIG_X86_PAE
         /* Need to make sure unshared kernel PMD is unpinned */
-        unpin_page(virt_to_page(pgd_page(pgd[pgd_index(TASK_SIZE)])), PT_PMD);
+        xen_unpin_page(virt_to_page(pgd_page(pgd[pgd_index(TASK_SIZE)])), PT_PMD);
 #endif
 
-        pgd_walk(pgd, unpin_page, USER_LIMIT);
+        xen_pgd_walk(pgd, xen_unpin_page, USER_LIMIT);
 
         xen_mc_issue(0);
 }
@@ -936,7 +938,7 @@ static void drop_other_mm_ref(void *info)
         }
 }
 
-static void drop_mm_ref(struct mm_struct *mm)
+static void xen_drop_mm_ref(struct mm_struct *mm)
 {
         cpumask_t mask;
         unsigned cpu;
@@ -966,7 +968,7 @@ static void drop_mm_ref(struct mm_struct *mm)
                 smp_call_function_mask(mask, drop_other_mm_ref, mm, 1);
 }
 #else
-static void drop_mm_ref(struct mm_struct *mm)
+static void xen_drop_mm_ref(struct mm_struct *mm)
 {
         if (current->active_mm == mm)
                 load_cr3(swapper_pg_dir);
@@ -990,13 +992,13 @@ static void drop_mm_ref(struct mm_struct *mm)
 void xen_exit_mmap(struct mm_struct *mm)
 {
         get_cpu();              /* make sure we don't move around */
-        drop_mm_ref(mm);
+        xen_drop_mm_ref(mm);
         put_cpu();
 
         spin_lock(&mm->page_table_lock);
 
         /* pgd may not be pinned in the error exit path of execve */
-        if (page_pinned(mm->pgd))
+        if (xen_page_pinned(mm->pgd))
                 xen_pgd_unpin(mm->pgd);
 
         spin_unlock(&mm->page_table_lock);