Merge branch 'mpi-master' into wip-k-fmlpwip-k-fmlp

Conflicts:
	litmus/sched_cedf.c

1 files changed, 52 insertions, 30 deletions

diff --git a/fs/ufs/super.c b/fs/ufs/super.c
index d510c1b91817..3915ade6f9a8 100644
--- a/fs/ufs/super.c
+++ b/fs/ufs/super.c
@@ -84,7 +84,6 @@
 #include <linux/blkdev.h>
 #include <linux/init.h>
 #include <linux/parser.h>
-#include <linux/smp_lock.h>
 #include <linux/buffer_head.h>
 #include <linux/vfs.h>
 #include <linux/log2.h>
@@ -96,6 +95,26 @@
 #include "swab.h"
 #include "util.h"
 
+void lock_ufs(struct super_block *sb)
+{
+#if defined(CONFIG_SMP) || defined (CONFIG_PREEMPT)
+        struct ufs_sb_info *sbi = UFS_SB(sb);
+
+        mutex_lock(&sbi->mutex);
+        sbi->mutex_owner = current;
+#endif
+}
+
+void unlock_ufs(struct super_block *sb)
+{
+#if defined(CONFIG_SMP) || defined (CONFIG_PREEMPT)
+        struct ufs_sb_info *sbi = UFS_SB(sb);
+
+        sbi->mutex_owner = NULL;
+        mutex_unlock(&sbi->mutex);
+#endif
+}
+
 static struct inode *ufs_nfs_get_inode(struct super_block *sb, u64 ino, u32 generation)
 {
         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
@@ -313,7 +332,6 @@ void ufs_panic (struct super_block * sb, const char * function,
         struct ufs_super_block_first * usb1;
         va_list args;
         
-        lock_kernel();
         uspi = UFS_SB(sb)->s_uspi;
         usb1 = ubh_get_usb_first(uspi);
         
@@ -465,9 +483,9 @@ static int ufs_parse_options (char * options, unsigned * mount_options)
 }
 
 /*
- * Diffrent types of UFS hold fs_cstotal in different
- * places, and use diffrent data structure for it.
- * To make things simplier we just copy fs_cstotal to ufs_sb_private_info
+ * Different types of UFS hold fs_cstotal in different
+ * places, and use different data structure for it.
+ * To make things simpler we just copy fs_cstotal to ufs_sb_private_info
  */
 static void ufs_setup_cstotal(struct super_block *sb)
 {
@@ -521,7 +539,7 @@ static int ufs_read_cylinder_structures(struct super_block *sb)
          */
         size = uspi->s_cssize;
         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
-        base = space = kmalloc(size, GFP_KERNEL);
+        base = space = kmalloc(size, GFP_NOFS);
         if (!base)
                 goto failed; 
         sbi->s_csp = (struct ufs_csum *)space;
@@ -546,7 +564,7 @@ static int ufs_read_cylinder_structures(struct super_block *sb)
          * Read cylinder group (we read only first fragment from block
          * at this time) and prepare internal data structures for cg caching.
          */
-        if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_KERNEL)))
+        if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_NOFS)))
                 goto failed;
         for (i = 0; i < uspi->s_ncg; i++) 
                 sbi->s_ucg[i] = NULL;
@@ -564,7 +582,7 @@ static int ufs_read_cylinder_structures(struct super_block *sb)
                 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
         }
         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
-                if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_KERNEL)))
+                if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_NOFS)))
                         goto failed;
                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
         }
@@ -646,8 +664,6 @@ static void ufs_put_super_internal(struct super_block *sb)
         
         UFSD("ENTER\n");
 
-        lock_kernel();
-
         ufs_put_cstotal(sb);
         size = uspi->s_cssize;
         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
@@ -676,8 +692,6 @@ static void ufs_put_super_internal(struct super_block *sb)
         kfree (sbi->s_ucg);
         kfree (base);
 
-        unlock_kernel();
-
         UFSD("EXIT\n");
 }
 
@@ -716,6 +730,7 @@ static int ufs_fill_super(struct super_block *sb, void *data, int silent)
                 goto failed;
         }
 #endif
+        mutex_init(&sbi->mutex);
         /*
          * Set default mount options
          * Parse mount options
@@ -1188,8 +1203,8 @@ static int ufs_sync_fs(struct super_block *sb, int wait)
         struct ufs_super_block_third * usb3;
         unsigned flags;
 
+        lock_ufs(sb);
         lock_super(sb);
-        lock_kernel();
 
         UFSD("ENTER\n");
 
@@ -1208,8 +1223,8 @@ static int ufs_sync_fs(struct super_block *sb, int wait)
         sb->s_dirt = 0;
 
         UFSD("EXIT\n");
-        unlock_kernel();
         unlock_super(sb);
+        unlock_ufs(sb);
 
         return 0;
 }
@@ -1251,7 +1266,7 @@ static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
         unsigned new_mount_opt, ufstype;
         unsigned flags;
 
-        lock_kernel();
+        lock_ufs(sb);
         lock_super(sb);
         uspi = UFS_SB(sb)->s_uspi;
         flags = UFS_SB(sb)->s_flags;
@@ -1267,7 +1282,7 @@ static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
         ufs_set_opt (new_mount_opt, ONERROR_LOCK);
         if (!ufs_parse_options (data, &new_mount_opt)) {
                 unlock_super(sb);
-                unlock_kernel();
+                unlock_ufs(sb);
                 return -EINVAL;
         }
         if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
@@ -1275,14 +1290,14 @@ static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
         } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
                 printk("ufstype can't be changed during remount\n");
                 unlock_super(sb);
-                unlock_kernel();
+                unlock_ufs(sb);
                 return -EINVAL;
         }
 
         if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
                 UFS_SB(sb)->s_mount_opt = new_mount_opt;
                 unlock_super(sb);
-                unlock_kernel();
+                unlock_ufs(sb);
                 return 0;
         }
         
@@ -1308,7 +1323,7 @@ static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
                 printk("ufs was compiled with read-only support, "
                 "can't be mounted as read-write\n");
                 unlock_super(sb);
-                unlock_kernel();
+                unlock_ufs(sb);
                 return -EINVAL;
 #else
                 if (ufstype != UFS_MOUNT_UFSTYPE_SUN && 
@@ -1318,13 +1333,13 @@ static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
                     ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
                         printk("this ufstype is read-only supported\n");
                         unlock_super(sb);
-                        unlock_kernel();
+                        unlock_ufs(sb);
                         return -EINVAL;
                 }
                 if (!ufs_read_cylinder_structures(sb)) {
                         printk("failed during remounting\n");
                         unlock_super(sb);
-                        unlock_kernel();
+                        unlock_ufs(sb);
                         return -EPERM;
                 }
                 sb->s_flags &= ~MS_RDONLY;
@@ -1332,7 +1347,7 @@ static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
         }
         UFS_SB(sb)->s_mount_opt = new_mount_opt;
         unlock_super(sb);
-        unlock_kernel();
+        unlock_ufs(sb);
         return 0;
 }
 
@@ -1366,7 +1381,7 @@ static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
         struct ufs_super_block_third *usb3;
         u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
 
-        lock_kernel();
+        lock_ufs(sb);
 
         usb1 = ubh_get_usb_first(uspi);
         usb2 = ubh_get_usb_second(uspi);
@@ -1390,7 +1405,7 @@ static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
         buf->f_fsid.val[0] = (u32)id;
         buf->f_fsid.val[1] = (u32)(id >> 32);
 
-        unlock_kernel();
+        unlock_ufs(sb);
 
         return 0;
 }
@@ -1400,18 +1415,25 @@ static struct kmem_cache * ufs_inode_cachep;
 static struct inode *ufs_alloc_inode(struct super_block *sb)
 {
         struct ufs_inode_info *ei;
-        ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, GFP_KERNEL);
+        ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, GFP_NOFS);
         if (!ei)
                 return NULL;
         ei->vfs_inode.i_version = 1;
         return &ei->vfs_inode;
 }
 
-static void ufs_destroy_inode(struct inode *inode)
+static void ufs_i_callback(struct rcu_head *head)
 {
+        struct inode *inode = container_of(head, struct inode, i_rcu);
+        INIT_LIST_HEAD(&inode->i_dentry);
         kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
 }
 
+static void ufs_destroy_inode(struct inode *inode)
+{
+        call_rcu(&inode->i_rcu, ufs_i_callback);
+}
+
 static void init_once(void *foo)
 {
         struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
@@ -1449,16 +1471,16 @@ static const struct super_operations ufs_super_ops = {
         .show_options   = ufs_show_options,
 };
 
-static int ufs_get_sb(struct file_system_type *fs_type,
-        int flags, const char *dev_name, void *data, struct vfsmount *mnt)
+static struct dentry *ufs_mount(struct file_system_type *fs_type,
+        int flags, const char *dev_name, void *data)
 {
-        return get_sb_bdev(fs_type, flags, dev_name, data, ufs_fill_super, mnt);
+        return mount_bdev(fs_type, flags, dev_name, data, ufs_fill_super);
 }
 
 static struct file_system_type ufs_fs_type = {
         .owner          = THIS_MODULE,
         .name           = "ufs",
-        .get_sb         = ufs_get_sb,
+        .mount          = ufs_mount,
         .kill_sb        = kill_block_super,
         .fs_flags       = FS_REQUIRES_DEV,
 };