These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / drivers / staging / lustre / lustre / libcfs / linux / linux-mem.c

diff --git a/kernel/drivers/staging/lustre/lustre/libcfs/linux/linux-mem.c b/kernel/drivers/staging/lustre/lustre/libcfs/linux/linux-mem.c
new file mode 100644 (file)
index 0000000..025e2f0
--- /dev/null
+++ b/kernel/drivers/staging/lustre/lustre/libcfs/linux/linux-mem.c
@@ -0,0 +1,59 @@
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; If not, see
+ * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
+ *
+ */
+/*
+ * This file creates a memory allocation primitive for Lustre, that
+ * allows to fallback to vmalloc allocations should regular kernel allocations
+ * fail due to size or system memory fragmentation.
+ *
+ * Author: Oleg Drokin <green@linuxhacker.ru>
+ *
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Seagate Technology.
+ */
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+
+#include "../../../include/linux/libcfs/libcfs.h"
+
+void *libcfs_kvzalloc(size_t size, gfp_t flags)
+{
+       void *ret;
+
+       ret = kzalloc(size, flags | __GFP_NOWARN);
+       if (!ret)
+               ret = __vmalloc(size, flags | __GFP_ZERO, PAGE_KERNEL);
+       return ret;
+}
+EXPORT_SYMBOL(libcfs_kvzalloc);
+
+void *libcfs_kvzalloc_cpt(struct cfs_cpt_table *cptab, int cpt, size_t size,
+                         gfp_t flags)
+{
+       void *ret;
+
+       ret = kzalloc_node(size, flags | __GFP_NOWARN,
+                          cfs_cpt_spread_node(cptab, cpt));
+       if (!ret) {
+               WARN_ON(!(flags & (__GFP_FS|__GFP_HIGH)));
+               ret = vmalloc_node(size, cfs_cpt_spread_node(cptab, cpt));
+       }
+
+       return ret;
+}
+EXPORT_SYMBOL(libcfs_kvzalloc_cpt);