[Xen-changelog] [xen-unstable] libxc: add bitmap_clear function

[Xen patchbot-unstable <patchbot@xxxxxxx>]

# HG changeset patch
# User Olaf Hering <olaf@xxxxxxxxx>
# Date 1321804960 -3600
# Node ID a2b4ae2becdf71c8d75cc34fcd56558632f757b4
# Parent  b531f5ceddf0fb291ffb23ccbaaa433207f45f80
libxc: add bitmap_clear function

Signed-off-by: Olaf Hering <olaf@xxxxxxxxx>
Committed-by: Ian Jackson <ian.jackson.citrix.com>
---


diff -r b531f5ceddf0 -r a2b4ae2becdf tools/libxc/xc_bitops.h
--- a/tools/libxc/xc_bitops.h   Sun Nov 20 17:02:39 2011 +0100
+++ b/tools/libxc/xc_bitops.h   Sun Nov 20 17:02:40 2011 +0100
@@ -4,6 +4,7 @@
 /* bitmap operations for single threaded access */
 
 #include <stdlib.h>
+#include <string.h>
 
 #define BITS_PER_LONG (sizeof(unsigned long) * 8)
 #define ORDER_LONG (sizeof(unsigned long) == 4 ? 5 : 6)
@@ -25,6 +26,11 @@
     return calloc(1, bitmap_size(nr_bits));
 }
 
+static inline void bitmap_clear(unsigned long *addr, int nr_bits)
+{
+    memset(addr, 0, bitmap_size(nr_bits));
+}
+
 static inline int test_bit(int nr, volatile unsigned long *addr)
 {
     return (BITMAP_ENTRY(nr, addr) >> BITMAP_SHIFT(nr)) & 1;

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