From 98d605000b8fb23805ea13daaf53ddbb22ae480e Mon Sep 17 00:00:00 2001
From: green <green>
Date: Thu, 13 Nov 2008 02:16:05 +0000
Subject: [PATCH] b=16823 r=adilger,shadow

Remove 4G limit for stripe_size * num_stripes.
4G limit on stripe_size is still in place, though.
---
 lustre/lov/lov_internal.h | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/lustre/lov/lov_internal.h b/lustre/lov/lov_internal.h
index 46fa422..3e53cba 100644
--- a/lustre/lov/lov_internal.h
+++ b/lustre/lov/lov_internal.h
@@ -327,4 +327,34 @@ struct pool_desc *lov_find_pool(struct lov_obd *lov, char *poolname);
 int lov_check_index_in_pool(__u32 idx, struct pool_desc *pool);
 
 
+#if BITS_PER_LONG == 64
+# define ll_do_div64(n,base) ({                                 \
+        uint64_t __base = (base);                               \
+        uint64_t __rem;                                         \
+        __rem = ((uint64_t)(n)) % __base;                       \
+        (n) = ((uint64_t)(n)) / __base;                         \
+        __rem;                                                  \
+  })
+#elif BITS_PER_LONG == 32
+# define ll_do_div64(n,base) ({                                 \
+        uint64_t __rem;                                         \
+        if ((sizeof(base) > 4) && (((base)&0xffffffff00000000ULL) != 0)) { \
+                int __remainder;                                \
+                LASSERTF(!((base) & (LOV_MIN_STRIPE_SIZE - 1)), "64 bit lov "\
+                          "division %llu / %llu\n", (n), (base)); \
+                __remainder = (n) & (LOV_MIN_STRIPE_SIZE - 1);  \
+                (n) >>= LOV_MIN_STRIPE_BITS;                    \
+                (base) >>= LOV_MIN_STRIPE_BITS;                 \
+                __rem = do_div(n, base);                        \
+                __rem <<= LOV_MIN_STRIPE_BITS;                  \
+                __rem += __remainder;                           \
+        } else {                                                \
+                __rem = do_div(n, base);                        \
+        }                                                       \
+        __rem;                                                  \
+  })
+#else
+#error Unsupported architecture.
+#endif
+
 #endif
-- 
1.8.3.1