powerpc/mm: Standardise on MMU_NO_CONTEXT

Use MMU_NO_CONTEXT as the initialiser for mm_context.id on
nohash and hash64.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

diff --git a/arch/powerpc/include/asm/tlbflush.h b/arch/powerpc/include/asm/tlbflush.h
index d50a380..81143fc 100644 (file)
--- a/arch/powerpc/include/asm/tlbflush.h
+++ b/arch/powerpc/include/asm/tlbflush.h
@@ -79,6 +79,8 @@ static inline void local_flush_tlb_mm(struct mm_struct *mm)
 
 #elif defined(CONFIG_PPC_STD_MMU_64)
 
+#define MMU_NO_CONTEXT         0
+
 /*
  * TLB flushing for 64-bit hash-MMU CPUs
  */

diff --git a/arch/powerpc/mm/mmu_context_hash64.c b/arch/powerpc/mm/mmu_context_hash64.c
index 2535828..c585944 100644 (file)
--- a/arch/powerpc/mm/mmu_context_hash64.c
+++ b/arch/powerpc/mm/mmu_context_hash64.c
@@ -31,7 +31,6 @@ static DEFINE_IDA(mmu_context_ida);
  * Each segment contains 2^28 bytes.  Each context maps 2^44 bytes,
  * so we can support 2^19-1 contexts (19 == 35 + 28 - 44).
  */
-#define NO_CONTEXT     0
 #define MAX_CONTEXT    ((1UL << 19) - 1)
 
 int __init_new_context(void)
@@ -95,5 +94,5 @@ void destroy_context(struct mm_struct *mm)
 {
        __destroy_context(mm->context.id);
        subpage_prot_free(mm);
-       mm->context.id = NO_CONTEXT;
+       mm->context.id = MMU_NO_CONTEXT;
 }