sparc64: redefine first version

CTX_FIRST_VERSION defines the first context version, but also it defines
first context. This patch redefines it to only include the first context
version.

Signed-off-by: Pavel Tatashin <pasha.tatashin@oracle.com>
Reviewed-by: Bob Picco <bob.picco@oracle.com>
Reviewed-by: Steven Sistare <steven.sistare@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/arch/sparc/include/asm/mmu_64.h b/arch/sparc/include/asm/mmu_64.h
index f7de0db..83b36a5 100644 (file)
--- a/arch/sparc/include/asm/mmu_64.h
+++ b/arch/sparc/include/asm/mmu_64.h
@@ -52,7 +52,7 @@
 #define CTX_NR_MASK            TAG_CONTEXT_BITS
 #define CTX_HW_MASK            (CTX_NR_MASK | CTX_PGSZ_MASK)
 
-#define CTX_FIRST_VERSION      ((_AC(1,UL) << CTX_VERSION_SHIFT) + _AC(1,UL))
+#define CTX_FIRST_VERSION      BIT(CTX_VERSION_SHIFT)
 #define CTX_VALID(__ctx)       \
         (!(((__ctx.sparc64_ctx_val) ^ tlb_context_cache) & CTX_VERSION_MASK))
 #define CTX_HWBITS(__ctx)      ((__ctx.sparc64_ctx_val) & CTX_HW_MASK)

diff --git a/arch/sparc/mm/init_64.c b/arch/sparc/mm/init_64.c
index f8e30a3..63b5044 100644 (file)
--- a/arch/sparc/mm/init_64.c
+++ b/arch/sparc/mm/init_64.c
@@ -707,7 +707,7 @@ EXPORT_SYMBOL(__flush_dcache_range);
 
 /* get_new_mmu_context() uses "cache + 1".  */
 DEFINE_SPINLOCK(ctx_alloc_lock);
-unsigned long tlb_context_cache = CTX_FIRST_VERSION - 1;
+unsigned long tlb_context_cache = CTX_FIRST_VERSION;
 #define MAX_CTX_NR     (1UL << CTX_NR_BITS)
 #define CTX_BMAP_SLOTS BITS_TO_LONGS(MAX_CTX_NR)
 DECLARE_BITMAP(mmu_context_bmap, MAX_CTX_NR);
@@ -738,9 +738,9 @@ void get_new_mmu_context(struct mm_struct *mm)
                if (new_ctx >= ctx) {
                        int i;
                        new_ctx = (tlb_context_cache & CTX_VERSION_MASK) +
-                               CTX_FIRST_VERSION;
+                               CTX_FIRST_VERSION + 1;
                        if (new_ctx == 1)
-                               new_ctx = CTX_FIRST_VERSION;
+                               new_ctx = CTX_FIRST_VERSION + 1;
 
                        /* Don't call memset, for 16 entries that's just
                         * plain silly...