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authorDavid S. Miller <davem@sunset.davemloft.net>2006-08-24 04:50:50 -0700
committerDavid S. Miller <davem@sunset.davemloft.net>2006-09-22 15:08:49 -0700
commit44e36b42a8378be1dcf7e6f8a1cb2710a8903387 (patch)
tree2c057957a4e4dc7f679ac671a9f091f3fe366b92 /net/xfrm/xfrm_hash.c
parent2518c7c2b3d7f0a6b302b4efe17c911f8dd4049f (diff)
downloadkernel-44e36b42a8378be1dcf7e6f8a1cb2710a8903387.tar.gz
[XFRM]: Extract common hashing code into xfrm_hash.[ch]
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/xfrm/xfrm_hash.c')
-rw-r--r--net/xfrm/xfrm_hash.c41
1 files changed, 41 insertions, 0 deletions
diff --git a/net/xfrm/xfrm_hash.c b/net/xfrm/xfrm_hash.c
new file mode 100644
index 000000000000..37643bb8768a
--- /dev/null
+++ b/net/xfrm/xfrm_hash.c
@@ -0,0 +1,41 @@
+/* xfrm_hash.c: Common hash table code.
+ *
+ * Copyright (C) 2006 David S. Miller (davem@davemloft.net)
+ */
+
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/bootmem.h>
+#include <linux/vmalloc.h>
+#include <linux/slab.h>
+#include <linux/xfrm.h>
+
+#include "xfrm_hash.h"
+
+struct hlist_head *xfrm_hash_alloc(unsigned int sz)
+{
+ struct hlist_head *n;
+
+ if (sz <= PAGE_SIZE)
+ n = kmalloc(sz, GFP_KERNEL);
+ else if (hashdist)
+ n = __vmalloc(sz, GFP_KERNEL, PAGE_KERNEL);
+ else
+ n = (struct hlist_head *)
+ __get_free_pages(GFP_KERNEL, get_order(sz));
+
+ if (n)
+ memset(n, 0, sz);
+
+ return n;
+}
+
+void xfrm_hash_free(struct hlist_head *n, unsigned int sz)
+{
+ if (sz <= PAGE_SIZE)
+ kfree(n);
+ else if (hashdist)
+ vfree(n);
+ else
+ free_pages((unsigned long)n, get_order(sz));
+}