arm: don't unnecessarily call pmap_extract()

[Patrick Wildt]

Hi,

there are two code points in the v7 pmap where we need the physical
address (to flush secondary cache) and use pmap_extract() instead
of just reading it from the vm page.  This diff removes those.

Patrick

diff --git sys/arch/arm/arm/pmap7.c sys/arch/arm/arm/pmap7.c
index 5bcc67b..78969bd 100644
--- sys/arch/arm/arm/pmap7.c
+++ sys/arch/arm/arm/pmap7.c
@@ -1105,11 +1105,9 @@ pmap_clean_page(struct vm_page *pg, int isync)
                         * now while we still have a valid mapping for it.
                         */
                        if (!wb) {
-                               paddr_t pa;
                                cpu_dcache_wb_range(pv->pv_va, PAGE_SIZE);
-                               if (pmap_extract(pm, (vaddr_t)pv->pv_va, &pa))
-                                       cpu_sdcache_wb_range(pv->pv_va, pa,
-                                           PAGE_SIZE);
+                               cpu_sdcache_wb_range(pv->pv_va,
+                                   VM_PAGE_TO_PHYS(pg), PAGE_SIZE);
                                wb = TRUE;
                        }
                }
@@ -1126,10 +1124,8 @@ pmap_clean_page(struct vm_page *pg, int isync)
                PTE_SYNC(cwb_pte);
                cpu_tlb_flushD_SE(cwbp);
                cpu_cpwait();
-               paddr_t pa;
                cpu_dcache_wb_range(cwbp, PAGE_SIZE);
-               if (pmap_extract(pmap_kernel(), (vaddr_t)cwbp, &pa))
-                       cpu_sdcache_wb_range(cwbp, pa, PAGE_SIZE);
+               cpu_sdcache_wb_range(cwbp, VM_PAGE_TO_PHYS(pg), PAGE_SIZE);
        }
 }