X-Git-Url: http://pilppa.org/gitweb/?a=blobdiff_plain;f=include%2Flinux%2Fmount.h;h=6d3047d8c91c877b9243a5093557ef77c5e61774;hb=6f4a7f4183bdbd02741dcd8edbd10b8628acc5d5;hp=403d1a97c512909c311815c4a282af8ea541351f;hpb=62ed948cb1405fe95d61d8c6445c102e0c9da0a6;p=linux-2.6-omap-h63xx.git

diff --git a/include/linux/mount.h b/include/linux/mount.h
index 403d1a97c51..6d3047d8c91 100644
--- a/include/linux/mount.h
+++ b/include/linux/mount.h
@@ -20,19 +20,20 @@
 struct super_block;
 struct vfsmount;
 struct dentry;
-struct namespace;
+struct mnt_namespace;
 
 #define MNT_NOSUID	0x01
 #define MNT_NODEV	0x02
 #define MNT_NOEXEC	0x04
 #define MNT_NOATIME	0x08
 #define MNT_NODIRATIME	0x10
+#define MNT_RELATIME	0x20
 
 #define MNT_SHRINKABLE	0x100
 
 #define MNT_SHARED	0x1000	/* if the vfsmount is a shared mount */
 #define MNT_UNBINDABLE	0x2000	/* if the vfsmount is a unbindable mount */
-#define MNT_PNODE_MASK	0x3000	/* propogation flag mask */
+#define MNT_PNODE_MASK	0x3000	/* propagation flag mask */
 
 struct vfsmount {
 	struct list_head mnt_hash;
@@ -42,9 +43,8 @@ struct vfsmount {
 	struct super_block *mnt_sb;	/* pointer to superblock */
 	struct list_head mnt_mounts;	/* list of children, anchored here */
 	struct list_head mnt_child;	/* and going through their mnt_child */
-	atomic_t mnt_count;
 	int mnt_flags;
-	int mnt_expiry_mark;		/* true if marked for expiry */
+	/* 4 bytes hole on 64bits arches */
 	char *mnt_devname;		/* Name of device e.g. /dev/dsk/hda1 */
 	struct list_head mnt_list;
 	struct list_head mnt_expire;	/* link in fs-specific expiry list */
@@ -52,7 +52,14 @@ struct vfsmount {
 	struct list_head mnt_slave_list;/* list of slave mounts */
 	struct list_head mnt_slave;	/* slave list entry */
 	struct vfsmount *mnt_master;	/* slave is on master->mnt_slave_list */
-	struct namespace *mnt_namespace; /* containing namespace */
+	struct mnt_namespace *mnt_ns;	/* containing namespace */
+	/*
+	 * We put mnt_count & mnt_expiry_mark at the end of struct vfsmount
+	 * to let these frequently modified fields in a separate cache line
+	 * (so that reads of mnt_flags wont ping-pong on SMP machines)
+	 */
+	atomic_t mnt_count;
+	int mnt_expiry_mark;		/* true if marked for expiry */
 	int mnt_pinned;
 };