1 files changed, 124 insertions, 0 deletions

diff --git a/fs/xfs/kmem.h b/fs/xfs/kmem.h
new file mode 100644
index 000000000000..f7c8f7a9ea6d
--- /dev/null
+++ b/fs/xfs/kmem.h
@@ -0,0 +1,124 @@
+/*
+ * Copyright (c) 2000-2005 Silicon Graphics, Inc.
+ * All Rights Reserved.
+ *
+ * This program 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.
+ *
+ * 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.  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; if not, write the Free Software Foundation,
+ * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+#ifndef __XFS_SUPPORT_KMEM_H__
+#define __XFS_SUPPORT_KMEM_H__
+
+#include <linux/slab.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/vmalloc.h>
+
+/*
+ * General memory allocation interfaces
+ */
+
+#define KM_SLEEP        0x0001u
+#define KM_NOSLEEP      0x0002u
+#define KM_NOFS         0x0004u
+#define KM_MAYFAIL      0x0008u
+
+/*
+ * We use a special process flag to avoid recursive callbacks into
+ * the filesystem during transactions.  We will also issue our own
+ * warnings, so we explicitly skip any generic ones (silly of us).
+ */
+static inline gfp_t
+kmem_flags_convert(unsigned int __nocast flags)
+{
+        gfp_t   lflags;
+
+        BUG_ON(flags & ~(KM_SLEEP|KM_NOSLEEP|KM_NOFS|KM_MAYFAIL));
+
+        if (flags & KM_NOSLEEP) {
+                lflags = GFP_ATOMIC | __GFP_NOWARN;
+        } else {
+                lflags = GFP_KERNEL | __GFP_NOWARN;
+                if ((current->flags & PF_FSTRANS) || (flags & KM_NOFS))
+                        lflags &= ~__GFP_FS;
+        }
+        return lflags;
+}
+
+extern void *kmem_alloc(size_t, unsigned int __nocast);
+extern void *kmem_zalloc(size_t, unsigned int __nocast);
+extern void *kmem_realloc(const void *, size_t, size_t, unsigned int __nocast);
+extern void  kmem_free(const void *);
+
+static inline void *kmem_zalloc_large(size_t size)
+{
+        void *ptr;
+
+        ptr = vmalloc(size);
+        if (ptr)
+                memset(ptr, 0, size);
+        return ptr;
+}
+static inline void kmem_free_large(void *ptr)
+{
+        vfree(ptr);
+}
+
+extern void *kmem_zalloc_greedy(size_t *, size_t, size_t);
+
+/*
+ * Zone interfaces
+ */
+
+#define KM_ZONE_HWALIGN SLAB_HWCACHE_ALIGN
+#define KM_ZONE_RECLAIM SLAB_RECLAIM_ACCOUNT
+#define KM_ZONE_SPREAD  SLAB_MEM_SPREAD
+
+#define kmem_zone       kmem_cache
+#define kmem_zone_t     struct kmem_cache
+
+static inline kmem_zone_t *
+kmem_zone_init(int size, char *zone_name)
+{
+        return kmem_cache_create(zone_name, size, 0, 0, NULL);
+}
+
+static inline kmem_zone_t *
+kmem_zone_init_flags(int size, char *zone_name, unsigned long flags,
+                     void (*construct)(void *))
+{
+        return kmem_cache_create(zone_name, size, 0, flags, construct);
+}
+
+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);
+}
+
+extern void *kmem_zone_alloc(kmem_zone_t *, unsigned int __nocast);
+extern void *kmem_zone_zalloc(kmem_zone_t *, unsigned int __nocast);
+
+static inline int
+kmem_shake_allow(gfp_t gfp_mask)
+{
+        return ((gfp_mask & __GFP_WAIT) && (gfp_mask & __GFP_FS));
+}
+
+#endif /* __XFS_SUPPORT_KMEM_H__ */