diff --git a/sys/powerpc/aim/interrupt.c b/sys/powerpc/aim/interrupt.c
index b06fb92e233..d1e36551458 100644
--- a/sys/powerpc/aim/interrupt.c
+++ b/sys/powerpc/aim/interrupt.c
@@ -100,10 +100,8 @@ powerpc_interrupt(struct trapframe *framep)
 	default:
 		/* Re-enable interrupts if applicable. */
 		ee = framep->srr1 & PSL_EE;
-		if (ee != 0) {
+		if (ee != 0)
 			mtmsr(mfmsr() | ee);
-			isync();
-		}
 		trap(framep);
 	}	        
 }
diff --git a/sys/powerpc/aim/mmu_oea.c b/sys/powerpc/aim/mmu_oea.c
index 30435f527fd..51c6f8a0dc9 100644
--- a/sys/powerpc/aim/mmu_oea.c
+++ b/sys/powerpc/aim/mmu_oea.c
@@ -584,25 +584,8 @@ moea_pte_change(struct pte *pt, struct pte *pvo_pt, vm_offset_t va)
 /*
  * Quick sort callout for comparing memory regions.
  */
-static int	mr_cmp(const void *a, const void *b);
 static int	om_cmp(const void *a, const void *b);
 
-static int
-mr_cmp(const void *a, const void *b)
-{
-	const struct	mem_region *regiona;
-	const struct	mem_region *regionb;
-
-	regiona = a;
-	regionb = b;
-	if (regiona->mr_start < regionb->mr_start)
-		return (-1);
-	else if (regiona->mr_start > regionb->mr_start)
-		return (1);
-	else
-		return (0);
-}
-
 static int
 om_cmp(const void *a, const void *b)
 {
@@ -720,7 +703,6 @@ moea_bootstrap(mmu_t mmup, vm_offset_t kernelstart, vm_offset_t kernelend)
 	mem_regions(&pregions, &pregions_sz, &regions, &regions_sz);
 	CTR0(KTR_PMAP, "moea_bootstrap: physical memory");
 
-	qsort(pregions, pregions_sz, sizeof(*pregions), mr_cmp);
 	for (i = 0; i < pregions_sz; i++) {
 		vm_offset_t pa;
 		vm_offset_t end;
@@ -749,7 +731,7 @@ moea_bootstrap(mmu_t mmup, vm_offset_t kernelstart, vm_offset_t kernelend)
 
 	if (sizeof(phys_avail)/sizeof(phys_avail[0]) < regions_sz)
 		panic("moea_bootstrap: phys_avail too small");
-	qsort(regions, regions_sz, sizeof(*regions), mr_cmp);
+
 	phys_avail_count = 0;
 	physsz = 0;
 	hwphyssz = 0;
diff --git a/sys/powerpc/aim/mmu_oea64.c b/sys/powerpc/aim/mmu_oea64.c
index c33a0941c39..bd7b7091bf2 100644
--- a/sys/powerpc/aim/mmu_oea64.c
+++ b/sys/powerpc/aim/mmu_oea64.c
@@ -162,8 +162,8 @@ __FBSDID("$FreeBSD$");
 void moea64_release_vsid(uint64_t vsid);
 uintptr_t moea64_get_unique_vsid(void); 
 
-#define DISABLE_TRANS(msr)	msr = mfmsr(); mtmsr(msr & ~PSL_DR); isync()
-#define ENABLE_TRANS(msr)	mtmsr(msr); isync()
+#define DISABLE_TRANS(msr)	msr = mfmsr(); mtmsr(msr & ~PSL_DR)
+#define ENABLE_TRANS(msr)	mtmsr(msr)
 
 #define	VSID_MAKE(sr, hash)	((sr) | (((hash) & 0xfffff) << 4))
 #define	VSID_TO_HASH(vsid)	(((vsid) >> 4) & 0xfffff)
@@ -473,25 +473,8 @@ moea64_calc_wimg(vm_offset_t pa, vm_memattr_t ma)
 /*
  * Quick sort callout for comparing memory regions.
  */
-static int	mr_cmp(const void *a, const void *b);
 static int	om_cmp(const void *a, const void *b);
 
-static int
-mr_cmp(const void *a, const void *b)
-{
-	const struct	mem_region *regiona;
-	const struct	mem_region *regionb;
-
-	regiona = a;
-	regionb = b;
-	if (regiona->mr_start < regionb->mr_start)
-		return (-1);
-	else if (regiona->mr_start > regionb->mr_start)
-		return (1);
-	else
-		return (0);
-}
-
 static int
 om_cmp(const void *a, const void *b)
 {
@@ -707,10 +690,9 @@ moea64_early_bootstrap(mmu_t mmup, vm_offset_t kernelstart, vm_offset_t kernelen
 	mem_regions(&pregions, &pregions_sz, &regions, &regions_sz);
 	CTR0(KTR_PMAP, "moea64_bootstrap: physical memory");
 
-	qsort(pregions, pregions_sz, sizeof(*pregions), mr_cmp);
 	if (sizeof(phys_avail)/sizeof(phys_avail[0]) < regions_sz)
 		panic("moea64_bootstrap: phys_avail too small");
-	qsort(regions, regions_sz, sizeof(*regions), mr_cmp);
+
 	phys_avail_count = 0;
 	physsz = 0;
 	hwphyssz = 0;
@@ -895,7 +877,7 @@ moea64_late_bootstrap(mmu_t mmup, vm_offset_t kernelstart, vm_offset_t kernelend
 	 * Initialize MMU and remap early physical mappings
 	 */
 	MMU_CPU_BOOTSTRAP(mmup,0);
-	mtmsr(mfmsr() | PSL_DR | PSL_IR); isync();
+	mtmsr(mfmsr() | PSL_DR | PSL_IR);
 	pmap_bootstrapped++;
 	bs_remap_earlyboot();
 
diff --git a/sys/powerpc/aim/moea64_native.c b/sys/powerpc/aim/moea64_native.c
index bca51ab4d2e..9e5174fcbba 100644
--- a/sys/powerpc/aim/moea64_native.c
+++ b/sys/powerpc/aim/moea64_native.c
@@ -185,8 +185,8 @@ TLBIE(uint64_t vpn) {
 	mtx_unlock_spin(&tlbie_mutex);
 }
 
-#define DISABLE_TRANS(msr)	msr = mfmsr(); mtmsr(msr & ~PSL_DR); isync()
-#define ENABLE_TRANS(msr)	mtmsr(msr); isync()
+#define DISABLE_TRANS(msr)	msr = mfmsr(); mtmsr(msr & ~PSL_DR)
+#define ENABLE_TRANS(msr)	mtmsr(msr)
 
 /*
  * PTEG data.
@@ -344,7 +344,7 @@ moea64_cpu_bootstrap_native(mmu_t mmup, int ap)
 	 * Initialize segment registers and MMU
 	 */
 
-	mtmsr(mfmsr() & ~PSL_DR & ~PSL_IR); isync();
+	mtmsr(mfmsr() & ~PSL_DR & ~PSL_IR);
 
 	/*
 	 * Install kernel SLB entries