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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /fs/ntfs/malloc.h
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'fs/ntfs/malloc.h')
-rw-r--r--fs/ntfs/malloc.h62
1 files changed, 62 insertions, 0 deletions
diff --git a/fs/ntfs/malloc.h b/fs/ntfs/malloc.h
new file mode 100644
index 000000000000..fac5944df6d8
--- /dev/null
+++ b/fs/ntfs/malloc.h
@@ -0,0 +1,62 @@
+/*
+ * malloc.h - NTFS kernel memory handling. Part of the Linux-NTFS project.
+ *
+ * Copyright (c) 2001-2004 Anton Altaparmakov
+ *
+ * This program/include file is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as published
+ * by the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program/include file 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 for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program (in the main directory of the Linux-NTFS
+ * distribution in the file COPYING); if not, write to the Free Software
+ * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#ifndef _LINUX_NTFS_MALLOC_H
+#define _LINUX_NTFS_MALLOC_H
+
+#include <linux/vmalloc.h>
+#include <linux/slab.h>
+#include <linux/highmem.h>
+
+/**
+ * ntfs_malloc_nofs - allocate memory in multiples of pages
+ * @size number of bytes to allocate
+ *
+ * Allocates @size bytes of memory, rounded up to multiples of PAGE_SIZE and
+ * returns a pointer to the allocated memory.
+ *
+ * If there was insufficient memory to complete the request, return NULL.
+ */
+static inline void *ntfs_malloc_nofs(unsigned long size)
+{
+ if (likely(size <= PAGE_SIZE)) {
+ BUG_ON(!size);
+ /* kmalloc() has per-CPU caches so is faster for now. */
+ return kmalloc(PAGE_SIZE, GFP_NOFS);
+ /* return (void *)__get_free_page(GFP_NOFS | __GFP_HIGHMEM); */
+ }
+ if (likely(size >> PAGE_SHIFT < num_physpages))
+ return __vmalloc(size, GFP_NOFS | __GFP_HIGHMEM, PAGE_KERNEL);
+ return NULL;
+}
+
+static inline void ntfs_free(void *addr)
+{
+ if (likely(((unsigned long)addr < VMALLOC_START) ||
+ ((unsigned long)addr >= VMALLOC_END ))) {
+ kfree(addr);
+ /* free_page((unsigned long)addr); */
+ return;
+ }
+ vfree(addr);
+}
+
+#endif /* _LINUX_NTFS_MALLOC_H */