"Tree RCU": scalable classic RCU implementation

[safe/jmp/linux-2.6] / lib / bitmap.c

diff --git a/lib/bitmap.c b/lib/bitmap.c
index 06fb57c..1338469 100644 (file)
--- a/lib/bitmap.c
+++ b/lib/bitmap.c
@@ -316,17 +316,6 @@ int bitmap_scnprintf(char *buf, unsigned int buflen,
 EXPORT_SYMBOL(bitmap_scnprintf);
 
 /**
- * bitmap_scnprintf_len - return buffer length needed to convert
- * bitmap to an ASCII hex string
- * @nr_bits: number of bits to be converted
- */
-int bitmap_scnprintf_len(unsigned int nr_bits)
-{
-       unsigned int nr_nibbles = ALIGN(nr_bits, 4) / 4;
-       return nr_nibbles + ALIGN(nr_nibbles, CHUNKSZ / 4) / (CHUNKSZ / 4) - 1;
-}
-
-/**
  * __bitmap_parse - convert an ASCII hex string into a bitmap.
  * @buf: pointer to buffer containing string.
  * @buflen: buffer size in bytes.  If string is smaller than this
@@ -1007,3 +996,25 @@ int bitmap_allocate_region(unsigned long *bitmap, int pos, int order)
        return 0;
 }
 EXPORT_SYMBOL(bitmap_allocate_region);
+
+/**
+ * bitmap_copy_le - copy a bitmap, putting the bits into little-endian order.
+ * @dst:   destination buffer
+ * @src:   bitmap to copy
+ * @nbits: number of bits in the bitmap
+ *
+ * Require nbits % BITS_PER_LONG == 0.
+ */
+void bitmap_copy_le(void *dst, const unsigned long *src, int nbits)
+{
+       unsigned long *d = dst;
+       int i;
+
+       for (i = 0; i < nbits/BITS_PER_LONG; i++) {
+               if (BITS_PER_LONG == 64)
+                       d[i] = cpu_to_le64(src[i]);
+               else
+                       d[i] = cpu_to_le32(src[i]);
+       }
+}
+EXPORT_SYMBOL(bitmap_copy_le);