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authorYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 12:17:53 -0700
committerYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 15:44:42 -0700
commit9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch)
tree1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/fs/xfs/kmem.h
parent98260f3884f4a202f9ca5eabed40b1354c489b29 (diff)
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/fs/xfs/kmem.h')
-rw-r--r--kernel/fs/xfs/kmem.h125
1 files changed, 125 insertions, 0 deletions
diff --git a/kernel/fs/xfs/kmem.h b/kernel/fs/xfs/kmem.h
new file mode 100644
index 000000000..cc6b768fc
--- /dev/null
+++ b/kernel/fs/xfs/kmem.h
@@ -0,0 +1,125 @@
+/*
+ * 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
+ */
+
+typedef unsigned __bitwise xfs_km_flags_t;
+#define KM_SLEEP ((__force xfs_km_flags_t)0x0001u)
+#define KM_NOSLEEP ((__force xfs_km_flags_t)0x0002u)
+#define KM_NOFS ((__force xfs_km_flags_t)0x0004u)
+#define KM_MAYFAIL ((__force xfs_km_flags_t)0x0008u)
+#define KM_ZERO ((__force xfs_km_flags_t)0x0010u)
+
+/*
+ * 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(xfs_km_flags_t flags)
+{
+ gfp_t lflags;
+
+ BUG_ON(flags & ~(KM_SLEEP|KM_NOSLEEP|KM_NOFS|KM_MAYFAIL|KM_ZERO));
+
+ 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;
+ }
+
+ if (flags & KM_ZERO)
+ lflags |= __GFP_ZERO;
+
+ return lflags;
+}
+
+extern void *kmem_alloc(size_t, xfs_km_flags_t);
+extern void *kmem_zalloc_large(size_t size, xfs_km_flags_t);
+extern void *kmem_realloc(const void *, size_t, size_t, xfs_km_flags_t);
+static inline void kmem_free(const void *ptr)
+{
+ kvfree(ptr);
+}
+
+
+extern void *kmem_zalloc_greedy(size_t *, size_t, size_t);
+
+static inline void *
+kmem_zalloc(size_t size, xfs_km_flags_t flags)
+{
+ return kmem_alloc(size, flags | KM_ZERO);
+}
+
+/*
+ * 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 *, xfs_km_flags_t);
+
+static inline void *
+kmem_zone_zalloc(kmem_zone_t *zone, xfs_km_flags_t flags)
+{
+ return kmem_zone_alloc(zone, flags | KM_ZERO);
+}
+
+#endif /* __XFS_SUPPORT_KMEM_H__ */