patch-2.4.27 linux-2.4.27/fs/xfs/linux-2.4/kmem.h

• Lines: 153
• Date: 2004-08-07 16:26:06.062404632 -0700
• Orig file: linux-2.4.26/fs/xfs/linux-2.4/kmem.h
• Orig date: 1969-12-31 16:00:00.000000000 -0800

diff -urN linux-2.4.26/fs/xfs/linux-2.4/kmem.h linux-2.4.27/fs/xfs/linux-2.4/kmem.h
@@ -0,0 +1,152 @@
+/*
+ * 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>
+
+/*
+ * 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;
+        
+#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();
+}
+
+static __inline int
+kmem_zone_shrink(kmem_zone_t *zone)
+{
+	return kmem_cache_shrink(zone);
+}
+
+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 void	    *kmem_shaker_t;
+typedef int	    (*kmem_shake_func_t)(int, unsigned int);
+
+extern kmem_shaker_t	kmem_shake_register(kmem_shake_func_t);
+extern void	    kmem_shake_deregister(kmem_shaker_t);
+
+static __inline int
+kmem_shake_allow(unsigned int gfp_mask)
+{
+	return (gfp_mask & __GFP_WAIT);
+}
+
+#endif /* __XFS_SUPPORT_KMEM_H__ */