1 files changed, 157 insertions, 0 deletions

diff --git a/fs/xfs/linux-2.6/kmem.h b/fs/xfs/linux-2.6/kmem.h
new file mode 100644
index 000000000000..1397b669b059
--- /dev/null
+++ b/fs/xfs/linux-2.6/kmem.h
@@ -0,0 +1,157 @@
+/*
+ * Copyright (c) 2000-2004 Silicon Graphics, Inc.  All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Further, this software is distributed without any warranty that it is
+ * free of the rightful claim of any third person regarding infringement
+ * or the like.  Any license provided herein, whether implied or
+ * otherwise, applies only to this software file.  Patent licenses, if
+ * any, provided herein do not apply to combinations of this program with
+ * other software, or any other product whatsoever.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write the Free Software Foundation, Inc., 59
+ * Temple Place - Suite 330, Boston MA 02111-1307, USA.
+ *
+ * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
+ * Mountain View, CA  94043, or:
+ *
+ * http://www.sgi.com
+ *
+ * For further information regarding this notice, see:
+ *
+ * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
+ */
+#ifndef __XFS_SUPPORT_KMEM_H__
+#define __XFS_SUPPORT_KMEM_H__
+
+#include <linux/slab.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+
+/*
+ * memory management routines
+ */
+#define KM_SLEEP        0x0001
+#define KM_NOSLEEP      0x0002
+#define KM_NOFS         0x0004
+#define KM_MAYFAIL      0x0008
+
+#define kmem_zone       kmem_cache_s
+#define kmem_zone_t     kmem_cache_t
+
+typedef unsigned long xfs_pflags_t;
+
+#define PFLAGS_TEST_NOIO()              (current->flags & PF_NOIO)
+#define PFLAGS_TEST_FSTRANS()           (current->flags & PF_FSTRANS)
+
+#define PFLAGS_SET_NOIO() do {          \
+        current->flags |= PF_NOIO;      \
+} while (0)
+
+#define PFLAGS_CLEAR_NOIO() do {        \
+        current->flags &= ~PF_NOIO;     \
+} while (0)
+
+/* these could be nested, so we save state */
+#define PFLAGS_SET_FSTRANS(STATEP) do { \
+        *(STATEP) = current->flags;     \
+        current->flags |= PF_FSTRANS;   \
+} while (0)
+
+#define PFLAGS_CLEAR_FSTRANS(STATEP) do { \
+        *(STATEP) = current->flags;     \
+        current->flags &= ~PF_FSTRANS;  \
+} while (0)
+
+/* Restore the PF_FSTRANS state to what was saved in STATEP */
+#define PFLAGS_RESTORE_FSTRANS(STATEP) do {                     \
+        current->flags = ((current->flags & ~PF_FSTRANS) |      \
+                          (*(STATEP) & PF_FSTRANS));            \
+} while (0)
+
+#define PFLAGS_DUP(OSTATEP, NSTATEP) do { \
+        *(NSTATEP) = *(OSTATEP);        \
+} while (0)
+
+static __inline unsigned int kmem_flags_convert(int flags)
+{
+        int     lflags = __GFP_NOWARN;  /* we'll report problems, if need be */
+
+#ifdef DEBUG
+        if (unlikely(flags & ~(KM_SLEEP|KM_NOSLEEP|KM_NOFS|KM_MAYFAIL))) {
+                printk(KERN_WARNING
+                    "XFS: memory allocation with wrong flags (%x)\n", flags);
+                BUG();
+        }
+#endif
+
+        if (flags & KM_NOSLEEP) {
+                lflags |= GFP_ATOMIC;
+        } else {
+                lflags |= GFP_KERNEL;
+
+                /* avoid recusive callbacks to filesystem during transactions */
+                if (PFLAGS_TEST_FSTRANS() || (flags & KM_NOFS))
+                        lflags &= ~__GFP_FS;
+        }
+        
+        return lflags;
+}
+
+static __inline kmem_zone_t *
+kmem_zone_init(int size, char *zone_name)
+{
+        return kmem_cache_create(zone_name, size, 0, 0, NULL, NULL);
+}
+
+static __inline void
+kmem_zone_free(kmem_zone_t *zone, void *ptr)
+{
+        kmem_cache_free(zone, ptr);
+}
+
+static __inline void
+kmem_zone_destroy(kmem_zone_t *zone)
+{
+        if (zone && kmem_cache_destroy(zone))
+                BUG();
+}
+
+extern void         *kmem_zone_zalloc(kmem_zone_t *, int);
+extern void         *kmem_zone_alloc(kmem_zone_t *, int);
+
+extern void         *kmem_alloc(size_t, int);
+extern void         *kmem_realloc(void *, size_t, size_t, int);
+extern void         *kmem_zalloc(size_t, int);
+extern void         kmem_free(void *, size_t);
+
+typedef struct shrinker *kmem_shaker_t;
+typedef int (*kmem_shake_func_t)(int, unsigned int);
+
+static __inline kmem_shaker_t
+kmem_shake_register(kmem_shake_func_t sfunc)
+{
+        return set_shrinker(DEFAULT_SEEKS, sfunc);
+}
+
+static __inline void
+kmem_shake_deregister(kmem_shaker_t shrinker)
+{
+        remove_shrinker(shrinker);
+}
+
+static __inline int
+kmem_shake_allow(unsigned int gfp_mask)
+{
+        return (gfp_mask & __GFP_WAIT);
+}
+
+#endif /* __XFS_SUPPORT_KMEM_H__ */