powerpc: Make VSID_BITS* dependency explicit

VSID_BITS and VSID_BITS_1T depends on the context bits  and user esid
bits. Make the dependency explicit

Acked-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: <stable@vger.kernel.org> [v3.8]

diff --git a/arch/powerpc/include/asm/mmu-hash64.h b/arch/powerpc/include/asm/mmu-hash64.h
index 2fdb47a..5f8c2bd 100644 (file)
--- a/arch/powerpc/include/asm/mmu-hash64.h
+++ b/arch/powerpc/include/asm/mmu-hash64.h
@@ -381,21 +381,22 @@ extern void slb_set_size(u16 size);
  * hash collisions.
  */
 
+#define CONTEXT_BITS           19
+#define USER_ESID_BITS         18
+#define USER_ESID_BITS_1T      6
+
 /*
  * This should be computed such that protovosid * vsid_mulitplier
  * doesn't overflow 64 bits. It should also be co-prime to vsid_modulus
  */
 #define VSID_MULTIPLIER_256M   ASM_CONST(12538073)     /* 24-bit prime */
-#define VSID_BITS_256M         38
+#define VSID_BITS_256M         (CONTEXT_BITS + USER_ESID_BITS + 1)
 #define VSID_MODULUS_256M      ((1UL<<VSID_BITS_256M)-1)
 
 #define VSID_MULTIPLIER_1T     ASM_CONST(12538073)     /* 24-bit prime */
-#define VSID_BITS_1T           26
+#define VSID_BITS_1T           (CONTEXT_BITS + USER_ESID_BITS_1T + 1)
 #define VSID_MODULUS_1T                ((1UL<<VSID_BITS_1T)-1)
 
-#define CONTEXT_BITS           19
-#define USER_ESID_BITS         18
-#define USER_ESID_BITS_1T      6
 
 #define USER_VSID_RANGE        (1UL << (USER_ESID_BITS + SID_SHIFT))