Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc

* 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc:
  [POWERPC] Fix zImage.coff generation for 32-bit pmac
  [POWERPC] Fix compile breakage for IBM/AMCC 4xx arch/ppc platforms
  [POWERPC] Don't allow PMAC_APM_EMU for 64-bit
  [POWERPC] Compare irq numbers with NO_IRQ not IRQ_NONE
  [POWERPC] Fix return from pte_alloc_one() in out-of-memory case
  [POWERPC] Fix compile warning in pseries xics code
  [POWERPC] Don't use HOSTCFLAGS in BOOTCFLAGS
  [POWERPC] Create a zImage for legacy iSeries
  [POWERPC] pasemi idle uses hard_smp_processor_id
  [POWERPC] ps3/interrupt.c uses get_hard_smp_processor_id
  [POWERPC] Fix possible access to free pages
  [POWERPC] Fix compiler/assembler flags for Ebony platform boot files
  [POWERPC] Fix ppc32 single-stepping out of syscalls
  [POWERPC] Update documentation for of_find_node_by_type()

2 files changed, 11 insertions, 1 deletions

diff --git a/include/asm-powerpc/pgalloc-64.h b/include/asm-powerpc/pgalloc-64.h
index d9a3a8c..94d0294 100644
--- a/include/asm-powerpc/pgalloc-64.h
+++ b/include/asm-powerpc/pgalloc-64.h
@@ -90,7 +90,8 @@ static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
 static inline struct page *pte_alloc_one(struct mm_struct *mm,
 					 unsigned long address)
 {
-	return virt_to_page(pte_alloc_one_kernel(mm, address));
+	pte_t *pte = pte_alloc_one_kernel(mm, address);
+	return pte ? virt_to_page(pte) : NULL;
 }
 
 static inline void pte_free_kernel(pte_t *pte)
diff --git a/include/asm-powerpc/tlb.h b/include/asm-powerpc/tlb.h
index 0a17682..6671404 100644
--- a/include/asm-powerpc/tlb.h
+++ b/include/asm-powerpc/tlb.h
@@ -38,6 +38,15 @@ extern void pte_free_finish(void);
 
 static inline void tlb_flush(struct mmu_gather *tlb)
 {
+	struct ppc64_tlb_batch *tlbbatch = &__get_cpu_var(ppc64_tlb_batch);
+
+	/* If there's a TLB batch pending, then we must flush it because the
+	 * pages are going to be freed and we really don't want to have a CPU
+	 * access a freed page because it has a stale TLB
+	 */
+	if (tlbbatch->index)
+		__flush_tlb_pending(tlbbatch);
+
 	pte_free_finish();
 }