Implement functions for allocating a bitmap.
Signed-off-by: Sascha Hauer <[email protected]>
---
include/linux/bitmap.h | 7 +++++++
lib/bitmap.c | 10 ++++++++++
2 files changed, 17 insertions(+)
diff --git a/include/linux/bitmap.h b/include/linux/bitmap.h
index adaf5428fe..7d06fac68d 100644
--- a/include/linux/bitmap.h
+++ b/include/linux/bitmap.h
@@ -80,6 +80,13 @@
* contain all bit positions from 0 to 'bits' - 1.
*/
+/*
+ * Allocation and deallocation of bitmap.
+ * Provided in lib/bitmap.c to avoid circular dependency.
+ */
+unsigned long *bitmap_zalloc(unsigned int nbits);
+unsigned long *bitmap_xzalloc(unsigned int nbits);
+
/*
* lib/bitmap.c provides these functions:
*/
diff --git a/lib/bitmap.c b/lib/bitmap.c
index 5be6651941..dfc0f06b13 100644
--- a/lib/bitmap.c
+++ b/lib/bitmap.c
@@ -837,3 +837,13 @@ void bitmap_copy_le(void *dst, const unsigned long *src,
int nbits)
}
}
EXPORT_SYMBOL(bitmap_copy_le);
+
+unsigned long *bitmap_zalloc(unsigned int nbits)
+{
+ return calloc(BITS_TO_LONGS(nbits), sizeof(unsigned long));
+}
+
+unsigned long *bitmap_xzalloc(unsigned int nbits)
+{
+ return xzalloc(BITS_TO_LONGS(nbits) * sizeof(unsigned long));
+}
--
2.30.2
