Protect inode->i_count with i_lock, rather than having it atomic. Next step should also be to move things together (eg. the refcount increment into d_instantiate, which will remove a lock/unlock cycle on i_lock). Signed-off-by: Nick Piggin --- arch/powerpc/platforms/cell/spufs/file.c | 2 - fs/affs/inode.c | 4 ++- fs/afs/dir.c | 4 ++- fs/anon_inodes.c | 4 ++- fs/bfs/dir.c | 4 ++- fs/block_dev.c | 15 ++++++++++-- fs/btrfs/inode.c | 4 ++- fs/cifs/inode.c | 2 - fs/coda/dir.c | 4 ++- fs/exofs/inode.c | 12 +++++++--- fs/exofs/namei.c | 4 ++- fs/ext2/namei.c | 4 ++- fs/ext3/ialloc.c | 4 +-- fs/ext3/namei.c | 4 ++- fs/ext4/ialloc.c | 4 +-- fs/ext4/namei.c | 4 ++- fs/fs-writeback.c | 4 +-- fs/gfs2/ops_inode.c | 4 ++- fs/hfsplus/dir.c | 4 ++- fs/hpfs/inode.c | 2 - fs/inode.c | 37 ++++++++++++++++++++----------- fs/jffs2/dir.c | 8 +++++- fs/jfs/jfs_txnmgr.c | 4 ++- fs/jfs/namei.c | 4 ++- fs/libfs.c | 4 ++- fs/locks.c | 3 -- fs/minix/namei.c | 4 ++- fs/namei.c | 7 ++++- fs/nfs/dir.c | 4 ++- fs/nfs/getroot.c | 4 ++- fs/nfs/inode.c | 4 +-- fs/nilfs2/mdt.c | 2 - fs/nilfs2/namei.c | 4 ++- fs/notify/inode_mark.c | 22 +++++++++++------- fs/notify/inotify/inotify.c | 28 +++++++++++++---------- fs/ntfs/super.c | 4 ++- fs/ocfs2/namei.c | 4 ++- fs/reiserfs/file.c | 4 +-- fs/reiserfs/namei.c | 4 ++- fs/reiserfs/stree.c | 2 - fs/sysv/namei.c | 4 ++- fs/ubifs/dir.c | 4 ++- fs/ubifs/super.c | 2 - fs/udf/namei.c | 4 ++- fs/ufs/namei.c | 4 ++- fs/xfs/linux-2.6/xfs_iops.c | 4 ++- fs/xfs/xfs_iget.c | 2 - fs/xfs/xfs_inode.h | 6 +++-- include/linux/fs.h | 2 - ipc/mqueue.c | 7 ++++- kernel/futex.c | 4 ++- mm/shmem.c | 4 ++- 52 files changed, 201 insertions(+), 96 deletions(-) Index: linux-2.6/arch/powerpc/platforms/cell/spufs/file.c =================================================================== --- linux-2.6.orig/arch/powerpc/platforms/cell/spufs/file.c +++ linux-2.6/arch/powerpc/platforms/cell/spufs/file.c @@ -1549,7 +1549,7 @@ static int spufs_mfc_open(struct inode * if (ctx->owner != current->mm) return -EINVAL; - if (atomic_read(&inode->i_count) != 1) + if (inode->i_count != 1) return -EBUSY; mutex_lock(&ctx->mapping_lock); Index: linux-2.6/fs/affs/inode.c =================================================================== --- linux-2.6.orig/fs/affs/inode.c +++ linux-2.6/fs/affs/inode.c @@ -380,7 +380,9 @@ affs_add_entry(struct inode *dir, struct affs_adjust_checksum(inode_bh, block - be32_to_cpu(chain)); mark_buffer_dirty_inode(inode_bh, inode); inode->i_nlink = 2; - atomic_inc(&inode->i_count); + spin_lock(&inode->i_lock); + inode->i_count++; + spin_unlock(&inode->i_lock); } affs_fix_checksum(sb, bh); mark_buffer_dirty_inode(bh, inode); Index: linux-2.6/fs/afs/dir.c =================================================================== --- linux-2.6.orig/fs/afs/dir.c +++ linux-2.6/fs/afs/dir.c @@ -1002,7 +1002,9 @@ static int afs_link(struct dentry *from, if (ret < 0) goto link_error; - atomic_inc(&vnode->vfs_inode.i_count); + spin_lock(&vnode->vfs_inode.i_lock); + vnode->vfs_inode.i_count++; + spin_unlock(&vnode->vfs_inode.i_lock); d_instantiate(dentry, &vnode->vfs_inode); key_put(key); _leave(" = 0"); Index: linux-2.6/fs/anon_inodes.c =================================================================== --- linux-2.6.orig/fs/anon_inodes.c +++ linux-2.6/fs/anon_inodes.c @@ -114,7 +114,9 @@ struct file *anon_inode_getfile(const ch * so we can avoid doing an igrab() and we can use an open-coded * atomic_inc(). */ - atomic_inc(&anon_inode_inode->i_count); + spin_lock(&anon_inode_inode->i_lock); + anon_inode_inode->i_count++; + spin_unlock(&anon_inode_inode->i_lock); path.dentry->d_op = &anon_inodefs_dentry_operations; d_instantiate(path.dentry, anon_inode_inode); Index: linux-2.6/fs/block_dev.c =================================================================== --- linux-2.6.orig/fs/block_dev.c +++ linux-2.6/fs/block_dev.c @@ -549,7 +549,12 @@ EXPORT_SYMBOL(bdget); */ struct block_device *bdgrab(struct block_device *bdev) { - atomic_inc(&bdev->bd_inode->i_count); + struct inode *inode = bdev->bd_inode; + + spin_lock(&inode->i_lock); + inode->i_count++; + spin_unlock(&inode->i_lock); + return bdev; } @@ -579,7 +584,9 @@ static struct block_device *bd_acquire(s spin_lock(&bdev_lock); bdev = inode->i_bdev; if (bdev) { - atomic_inc(&bdev->bd_inode->i_count); + spin_lock(&inode->i_lock); + bdev->bd_inode->i_count++; + spin_unlock(&inode->i_lock); spin_unlock(&bdev_lock); return bdev; } @@ -595,7 +602,9 @@ static struct block_device *bd_acquire(s * So, we can access it via ->i_mapping always * without igrab(). */ - atomic_inc(&bdev->bd_inode->i_count); + spin_lock(&inode->i_lock); + bdev->bd_inode->i_count++; + spin_unlock(&inode->i_lock); inode->i_bdev = bdev; inode->i_mapping = bdev->bd_inode->i_mapping; list_add(&inode->i_devices, &bdev->bd_inodes); Index: linux-2.6/fs/ext2/namei.c =================================================================== --- linux-2.6.orig/fs/ext2/namei.c +++ linux-2.6/fs/ext2/namei.c @@ -206,7 +206,9 @@ static int ext2_link (struct dentry * ol inode->i_ctime = CURRENT_TIME_SEC; inode_inc_link_count(inode); - atomic_inc(&inode->i_count); + spin_lock(&inode->i_lock); + inode->i_count++; + spin_unlock(&inode->i_lock); err = ext2_add_link(dentry, inode); if (!err) { Index: linux-2.6/fs/ext3/ialloc.c =================================================================== --- linux-2.6.orig/fs/ext3/ialloc.c +++ linux-2.6/fs/ext3/ialloc.c @@ -100,9 +100,9 @@ void ext3_free_inode (handle_t *handle, struct ext3_sb_info *sbi; int fatal = 0, err; - if (atomic_read(&inode->i_count) > 1) { + if (inode->i_count > 1) { printk ("ext3_free_inode: inode has count=%d\n", - atomic_read(&inode->i_count)); + inode->i_count); return; } if (inode->i_nlink) { Index: linux-2.6/fs/ext3/namei.c =================================================================== --- linux-2.6.orig/fs/ext3/namei.c +++ linux-2.6/fs/ext3/namei.c @@ -2261,7 +2261,9 @@ retry: inode->i_ctime = CURRENT_TIME_SEC; inc_nlink(inode); - atomic_inc(&inode->i_count); + spin_lock(&inode->i_lock); + inode->i_count++; + spin_unlock(&inode->i_lock); err = ext3_add_entry(handle, dentry, inode); if (!err) { Index: linux-2.6/fs/fs-writeback.c =================================================================== --- linux-2.6.orig/fs/fs-writeback.c +++ linux-2.6/fs/fs-writeback.c @@ -427,7 +427,7 @@ writeback_single_inode(struct inode *ino unsigned dirty; int ret; - if (!atomic_read(&inode->i_count)) + if (!inode->i_count) WARN_ON(!(inode->i_state & (I_WILL_FREE|I_FREEING))); else WARN_ON(inode->i_state & I_WILL_FREE); @@ -551,7 +551,7 @@ select_queue: inode->i_state |= I_DIRTY_PAGES; redirty_tail(inode); } - } else if (atomic_read(&inode->i_count)) { + } else if (inode->i_count) { /* * The inode is clean, inuse */ Index: linux-2.6/fs/inode.c =================================================================== --- linux-2.6.orig/fs/inode.c +++ linux-2.6/fs/inode.c @@ -33,14 +33,13 @@ * inode_hash_lock protects: * inode hash table, i_hash * inode->i_lock protects: - * i_state + * i_state, i_count * * Ordering: * inode_lock * sb_inode_list_lock * inode->i_lock - * inode_lock - * inode_hash_lock + * inode_hash_lock */ /* * This is needed for the following functions: @@ -151,7 +150,7 @@ int inode_init_always(struct super_block inode->i_sb = sb; inode->i_blkbits = sb->s_blocksize_bits; inode->i_flags = 0; - atomic_set(&inode->i_count, 1); + inode->i_count = 1; inode->i_op = &empty_iops; inode->i_fop = &empty_fops; inode->i_nlink = 1; @@ -306,7 +305,8 @@ void __iget(struct inode *inode) { assert_spin_locked(&inode->i_lock); - if (atomic_inc_return(&inode->i_count) != 1) + inode->i_count++; + if (inode->i_count > 1) return; if (!(inode->i_state & (I_DIRTY|I_SYNC))) @@ -412,7 +412,7 @@ static int invalidate_list(struct list_h continue; } invalidate_inode_buffers(inode); - if (!atomic_read(&inode->i_count)) { + if (!inode->i_count) { list_move(&inode->i_list, dispose); WARN_ON(inode->i_state & I_NEW); inode->i_state |= I_FREEING; @@ -463,7 +463,7 @@ static int can_unuse(struct inode *inode return 0; if (inode_has_buffers(inode)) return 0; - if (atomic_read(&inode->i_count)) + if (inode->i_count) return 0; if (inode->i_data.nrpages) return 0; @@ -501,7 +501,7 @@ static void prune_icache(int nr_to_scan) inode = list_entry(inode_unused.prev, struct inode, i_list); spin_lock(&inode->i_lock); - if (inode->i_state || atomic_read(&inode->i_count)) { + if (inode->i_state || inode->i_count) { list_move(&inode->i_list, &inode_unused); spin_unlock(&inode->i_lock); continue; @@ -1290,8 +1290,6 @@ void generic_delete_inode(struct inode * { const struct super_operations *op = inode->i_sb->s_op; - spin_lock(&sb_inode_list_lock); - spin_lock(&inode->i_lock); list_del_init(&inode->i_list); list_del_init(&inode->i_sb_list); spin_unlock(&sb_inode_list_lock); @@ -1336,8 +1334,6 @@ int generic_detach_inode(struct inode *i { struct super_block *sb = inode->i_sb; - spin_lock(&sb_inode_list_lock); - spin_lock(&inode->i_lock); if (!hlist_unhashed(&inode->i_hash)) { if (!(inode->i_state & (I_DIRTY|I_SYNC))) list_move(&inode->i_list, &inode_unused); @@ -1436,8 +1432,24 @@ void iput(struct inode *inode) if (inode) { BUG_ON(inode->i_state == I_CLEAR); - if (atomic_dec_and_lock(&inode->i_count, &inode_lock)) +retry: + spin_lock(&inode->i_lock); + if (inode->i_count == 1) { + if (!spin_trylock(&inode_lock)) { + spin_unlock(&inode->i_lock); + goto retry; + } + if (!spin_trylock(&sb_inode_list_lock)) { + spin_unlock(&inode_lock); + spin_unlock(&inode->i_lock); + goto retry; + } + inode->i_count--; iput_final(inode); + } else { + inode->i_count--; + spin_unlock(&inode->i_lock); + } } } EXPORT_SYMBOL(iput); Index: linux-2.6/fs/libfs.c =================================================================== --- linux-2.6.orig/fs/libfs.c +++ linux-2.6/fs/libfs.c @@ -277,7 +277,9 @@ int simple_link(struct dentry *old_dentr inode->i_ctime = dir->i_ctime = dir->i_mtime = CURRENT_TIME; inc_nlink(inode); - atomic_inc(&inode->i_count); + spin_lock(&inode->i_lock); + inode->i_count++; + spin_unlock(&inode->i_lock); dget(dentry); d_instantiate(dentry, inode); return 0; Index: linux-2.6/fs/locks.c =================================================================== --- linux-2.6.orig/fs/locks.c +++ linux-2.6/fs/locks.c @@ -1375,8 +1375,7 @@ int generic_setlease(struct file *filp, if ((arg == F_RDLCK) && (atomic_read(&inode->i_writecount) > 0)) goto out; if ((arg == F_WRLCK) - && (dentry->d_count > 1 - || (atomic_read(&inode->i_count) > 1))) + && (dentry->d_count > 1 || inode->i_count > 1)) goto out; } Index: linux-2.6/fs/namei.c =================================================================== --- linux-2.6.orig/fs/namei.c +++ linux-2.6/fs/namei.c @@ -2306,8 +2306,11 @@ static long do_unlinkat(int dfd, const c if (nd.last.name[nd.last.len]) goto slashes; inode = dentry->d_inode; - if (inode) - atomic_inc(&inode->i_count); + if (inode) { + spin_lock(&inode->i_lock); + inode->i_count++; + spin_unlock(&inode->i_lock); + } error = mnt_want_write(nd.path.mnt); if (error) goto exit2; Index: linux-2.6/fs/nfs/dir.c =================================================================== --- linux-2.6.orig/fs/nfs/dir.c +++ linux-2.6/fs/nfs/dir.c @@ -1570,7 +1570,9 @@ nfs_link(struct dentry *old_dentry, stru d_drop(dentry); error = NFS_PROTO(dir)->link(inode, dir, &dentry->d_name); if (error == 0) { - atomic_inc(&inode->i_count); + spin_lock(&inode->i_lock); + inode->i_count++; + spin_unlock(&inode->i_lock); d_add(dentry, inode); } return error; Index: linux-2.6/fs/nfs/getroot.c =================================================================== --- linux-2.6.orig/fs/nfs/getroot.c +++ linux-2.6/fs/nfs/getroot.c @@ -55,7 +55,9 @@ static int nfs_superblock_set_dummy_root return -ENOMEM; } /* Circumvent igrab(): we know the inode is not being freed */ - atomic_inc(&inode->i_count); + spin_lock(&inode->i_lock); + inode->i_count++; + spin_unlock(&inode->i_lock); /* * Ensure that this dentry is invisible to d_find_alias(). * Otherwise, it may be spliced into the tree by Index: linux-2.6/fs/notify/inotify/inotify.c =================================================================== --- linux-2.6.orig/fs/notify/inotify/inotify.c +++ linux-2.6/fs/notify/inotify/inotify.c @@ -404,23 +404,28 @@ void inotify_unmount_inodes(struct list_ * evict all inodes with zero i_count from icache which is * unnecessarily violent and may in fact be illegal to do. */ - if (!atomic_read(&inode->i_count)) + if (!inode->i_count) continue; need_iput_tmp = need_iput; need_iput = NULL; /* In case inotify_remove_watch_locked() drops a reference. */ - if (inode != need_iput_tmp) + if (inode != need_iput_tmp) { + spin_lock(&inode->i_lock); __iget(inode); - else + spin_unlock(&inode->i_lock); + } else need_iput_tmp = NULL; /* In case the dropping of a reference would nuke next_i. */ - if ((&next_i->i_sb_list != list) && - atomic_read(&next_i->i_count) && - !(next_i->i_state & (I_CLEAR | I_FREEING | - I_WILL_FREE))) { - __iget(next_i); - need_iput = next_i; + if (&next_i->i_sb_list != list) { + spin_lock(&next_i->i_lock); + if (next_i->i_count && + !(next_i->i_state & + (I_CLEAR|I_FREEING|I_WILL_FREE))) { + __iget(next_i); + need_iput = next_i; + } + spin_unlock(&next_i->i_lock); } /* @@ -439,11 +444,10 @@ void inotify_unmount_inodes(struct list_ mutex_lock(&inode->inotify_mutex); watches = &inode->inotify_watches; list_for_each_entry_safe(watch, next_w, watches, i_list) { - struct inotify_handle *ih= watch->ih; + struct inotify_handle *ih = watch->ih; get_inotify_watch(watch); mutex_lock(&ih->mutex); - ih->in_ops->handle_event(watch, watch->wd, IN_UNMOUNT, 0, - NULL, NULL); + ih->in_ops->handle_event(watch, watch->wd, IN_UNMOUNT, 0, NULL, NULL); inotify_remove_watch_locked(ih, watch); mutex_unlock(&ih->mutex); put_inotify_watch(watch); Index: linux-2.6/fs/xfs/linux-2.6/xfs_iops.c =================================================================== --- linux-2.6.orig/fs/xfs/linux-2.6/xfs_iops.c +++ linux-2.6/fs/xfs/linux-2.6/xfs_iops.c @@ -360,7 +360,9 @@ xfs_vn_link( if (unlikely(error)) return -error; - atomic_inc(&inode->i_count); + spin_lock(&inode->i_lock); + inode->i_count++; + spin_unlock(&inode->i_lock); d_instantiate(dentry, inode); return 0; } Index: linux-2.6/fs/xfs/xfs_inode.h =================================================================== --- linux-2.6.orig/fs/xfs/xfs_inode.h +++ linux-2.6/fs/xfs/xfs_inode.h @@ -483,8 +483,10 @@ void xfs_mark_inode_dirty_sync(xfs_inod #define IHOLD(ip) \ do { \ - ASSERT(atomic_read(&VFS_I(ip)->i_count) > 0) ; \ - atomic_inc(&(VFS_I(ip)->i_count)); \ + spin_lock(&VFS_I(ip)->i_lock); \ + ASSERT(VFS_I(ip)->i_count > 0) ; \ + VFS_I(ip)->i_count++; \ + spin_unlock(&VFS_I(ip)->i_lock); \ trace_xfs_ihold(ip, _THIS_IP_); \ } while (0) Index: linux-2.6/include/linux/fs.h =================================================================== --- linux-2.6.orig/include/linux/fs.h +++ linux-2.6/include/linux/fs.h @@ -729,7 +729,7 @@ struct inode { struct list_head i_sb_list; struct list_head i_dentry; unsigned long i_ino; - atomic_t i_count; + unsigned int i_count; unsigned int i_nlink; uid_t i_uid; gid_t i_gid; Index: linux-2.6/ipc/mqueue.c =================================================================== --- linux-2.6.orig/ipc/mqueue.c +++ linux-2.6/ipc/mqueue.c @@ -769,8 +769,11 @@ SYSCALL_DEFINE1(mq_unlink, const char __ } inode = dentry->d_inode; - if (inode) - atomic_inc(&inode->i_count); + if (inode) { + spin_lock(&inode->i_lock); + inode->i_count++; + spin_unlock(&inode->i_lock); + } err = mnt_want_write(ipc_ns->mq_mnt); if (err) goto out_err; Index: linux-2.6/kernel/futex.c =================================================================== --- linux-2.6.orig/kernel/futex.c +++ linux-2.6/kernel/futex.c @@ -168,7 +168,9 @@ static void get_futex_key_refs(union fut switch (key->both.offset & (FUT_OFF_INODE|FUT_OFF_MMSHARED)) { case FUT_OFF_INODE: - atomic_inc(&key->shared.inode->i_count); + spin_lock(&key->shared.inode->i_lock); + key->shared.inode->i_count++; + spin_unlock(&key->shared.inode->i_lock); break; case FUT_OFF_MMSHARED: atomic_inc(&key->private.mm->mm_count); Index: linux-2.6/mm/shmem.c =================================================================== --- linux-2.6.orig/mm/shmem.c +++ linux-2.6/mm/shmem.c @@ -1877,7 +1877,9 @@ static int shmem_link(struct dentry *old dir->i_size += BOGO_DIRENT_SIZE; inode->i_ctime = dir->i_ctime = dir->i_mtime = CURRENT_TIME; inc_nlink(inode); - atomic_inc(&inode->i_count); /* New dentry reference */ + spin_lock(&inode->i_lock); + inode->i_count++; /* New dentry reference */ + spin_unlock(&inode->i_lock); dget(dentry); /* Extra pinning count for the created dentry */ d_instantiate(dentry, inode); out: Index: linux-2.6/fs/bfs/dir.c =================================================================== --- linux-2.6.orig/fs/bfs/dir.c +++ linux-2.6/fs/bfs/dir.c @@ -176,7 +176,9 @@ static int bfs_link(struct dentry *old, inc_nlink(inode); inode->i_ctime = CURRENT_TIME_SEC; mark_inode_dirty(inode); - atomic_inc(&inode->i_count); + spin_lock(&inode->i_lock); + inode->i_count++; + spin_unlock(&inode->i_lock); d_instantiate(new, inode); mutex_unlock(&info->bfs_lock); return 0; Index: linux-2.6/fs/btrfs/inode.c =================================================================== --- linux-2.6.orig/fs/btrfs/inode.c +++ linux-2.6/fs/btrfs/inode.c @@ -4753,7 +4753,9 @@ static int btrfs_link(struct dentry *old } btrfs_set_trans_block_group(trans, dir); - atomic_inc(&inode->i_count); + spin_lock(&inode->i_lock); + inode->i_count++; + spin_unlock(&inode->i_lock); err = btrfs_add_nondir(trans, dentry, inode, 1, index); Index: linux-2.6/fs/coda/dir.c =================================================================== --- linux-2.6.orig/fs/coda/dir.c +++ linux-2.6/fs/coda/dir.c @@ -303,7 +303,9 @@ static int coda_link(struct dentry *sour } coda_dir_update_mtime(dir_inode); - atomic_inc(&inode->i_count); + spin_lock(&inode->i_lock); + inode->i_count++; + spin_unlock(&inode->i_lock); d_instantiate(de, inode); inc_nlink(inode); Index: linux-2.6/fs/exofs/inode.c =================================================================== --- linux-2.6.orig/fs/exofs/inode.c +++ linux-2.6/fs/exofs/inode.c @@ -1124,7 +1124,9 @@ static void create_done(struct exofs_io_ set_obj_created(oi); - atomic_dec(&inode->i_count); + spin_lock(&inode->i_lock); + inode->i_count--; + spin_unlock(&inode->i_lock); wake_up(&oi->i_wq); } @@ -1177,14 +1179,18 @@ struct inode *exofs_new_inode(struct ino /* increment the refcount so that the inode will still be around when we * reach the callback */ - atomic_inc(&inode->i_count); + spin_lock(&inode->i_lock); + inode->i_count++; + spin_unlock(&inode->i_lock); ios->done = create_done; ios->private = inode; ios->cred = oi->i_cred; ret = exofs_sbi_create(ios); if (ret) { - atomic_dec(&inode->i_count); + spin_lock(&inode->i_lock); + inode->i_count--; + spin_unlock(&inode->i_lock); exofs_put_io_state(ios); return ERR_PTR(ret); } Index: linux-2.6/fs/exofs/namei.c =================================================================== --- linux-2.6.orig/fs/exofs/namei.c +++ linux-2.6/fs/exofs/namei.c @@ -153,7 +153,9 @@ static int exofs_link(struct dentry *old inode->i_ctime = CURRENT_TIME; inode_inc_link_count(inode); - atomic_inc(&inode->i_count); + spin_lock(&inode->i_lock); + inode->i_count++; + spin_unlock(&inode->i_lock); return exofs_add_nondir(dentry, inode); } Index: linux-2.6/fs/ext4/ialloc.c =================================================================== --- linux-2.6.orig/fs/ext4/ialloc.c +++ linux-2.6/fs/ext4/ialloc.c @@ -189,9 +189,9 @@ void ext4_free_inode(handle_t *handle, s struct ext4_sb_info *sbi; int fatal = 0, err, count, cleared; - if (atomic_read(&inode->i_count) > 1) { + if (inode->i_count > 1) { printk(KERN_ERR "ext4_free_inode: inode has count=%d\n", - atomic_read(&inode->i_count)); + inode->i_count); return; } if (inode->i_nlink) { Index: linux-2.6/fs/ext4/namei.c =================================================================== --- linux-2.6.orig/fs/ext4/namei.c +++ linux-2.6/fs/ext4/namei.c @@ -2340,7 +2340,9 @@ retry: inode->i_ctime = ext4_current_time(inode); ext4_inc_count(handle, inode); - atomic_inc(&inode->i_count); + spin_lock(&inode->i_lock); + inode->i_count++; + spin_unlock(&inode->i_lock); err = ext4_add_entry(handle, dentry, inode); if (!err) { Index: linux-2.6/fs/gfs2/ops_inode.c =================================================================== --- linux-2.6.orig/fs/gfs2/ops_inode.c +++ linux-2.6/fs/gfs2/ops_inode.c @@ -253,7 +253,9 @@ out_parent: gfs2_holder_uninit(ghs); gfs2_holder_uninit(ghs + 1); if (!error) { - atomic_inc(&inode->i_count); + spin_lock(&inode->i_lock); + inode->i_count++; + spin_unlock(&inode->i_lock); d_instantiate(dentry, inode); mark_inode_dirty(inode); } Index: linux-2.6/fs/hfsplus/dir.c =================================================================== --- linux-2.6.orig/fs/hfsplus/dir.c +++ linux-2.6/fs/hfsplus/dir.c @@ -301,7 +301,9 @@ static int hfsplus_link(struct dentry *s inc_nlink(inode); hfsplus_instantiate(dst_dentry, inode, cnid); - atomic_inc(&inode->i_count); + spin_lock(&inode->i_lock); + inode->i_count++; + spin_unlock(&inode->i_lock); inode->i_ctime = CURRENT_TIME_SEC; mark_inode_dirty(inode); HFSPLUS_SB(sb).file_count++; Index: linux-2.6/fs/hpfs/inode.c =================================================================== --- linux-2.6.orig/fs/hpfs/inode.c +++ linux-2.6/fs/hpfs/inode.c @@ -183,7 +183,7 @@ void hpfs_write_inode(struct inode *i) struct hpfs_inode_info *hpfs_inode = hpfs_i(i); struct inode *parent; if (i->i_ino == hpfs_sb(i->i_sb)->sb_root) return; - if (hpfs_inode->i_rddir_off && !atomic_read(&i->i_count)) { + if (hpfs_inode->i_rddir_off && !i->i_count) { if (*hpfs_inode->i_rddir_off) printk("HPFS: write_inode: some position still there\n"); kfree(hpfs_inode->i_rddir_off); hpfs_inode->i_rddir_off = NULL; Index: linux-2.6/fs/jffs2/dir.c =================================================================== --- linux-2.6.orig/fs/jffs2/dir.c +++ linux-2.6/fs/jffs2/dir.c @@ -290,7 +290,9 @@ static int jffs2_link (struct dentry *ol mutex_unlock(&f->sem); d_instantiate(dentry, old_dentry->d_inode); dir_i->i_mtime = dir_i->i_ctime = ITIME(now); - atomic_inc(&old_dentry->d_inode->i_count); + spin_lock(&old_dentry->d_inode->i_lock); + old_dentry->d_inode->i_count++; + spin_unlock(&old_dentry->d_inode->i_lock); } return ret; } @@ -871,7 +873,9 @@ static int jffs2_rename (struct inode *o printk(KERN_NOTICE "jffs2_rename(): Link succeeded, unlink failed (err %d). You now have a hard link\n", ret); /* Might as well let the VFS know */ d_instantiate(new_dentry, old_dentry->d_inode); - atomic_inc(&old_dentry->d_inode->i_count); + spin_lock(&old_dentry->d_inode->i_lock); + old_dentry->d_inode->i_count++; + spin_unlock(&old_dentry->d_inode->i_lock); new_dir_i->i_mtime = new_dir_i->i_ctime = ITIME(now); return ret; } Index: linux-2.6/fs/jfs/jfs_txnmgr.c =================================================================== --- linux-2.6.orig/fs/jfs/jfs_txnmgr.c +++ linux-2.6/fs/jfs/jfs_txnmgr.c @@ -1279,7 +1279,9 @@ int txCommit(tid_t tid, /* transaction * lazy commit thread finishes processing */ if (tblk->xflag & COMMIT_DELETE) { - atomic_inc(&tblk->u.ip->i_count); + spin_lock(&tblk->u.ip->i_lock); + tblk->u.ip->i_count++; + spin_unlock(&tblk->u.ip->i_lock); /* * Avoid a rare deadlock * Index: linux-2.6/fs/jfs/namei.c =================================================================== --- linux-2.6.orig/fs/jfs/namei.c +++ linux-2.6/fs/jfs/namei.c @@ -839,7 +839,9 @@ static int jfs_link(struct dentry *old_d ip->i_ctime = CURRENT_TIME; dir->i_ctime = dir->i_mtime = CURRENT_TIME; mark_inode_dirty(dir); - atomic_inc(&ip->i_count); + spin_lock(&ip->i_lock); + ip->i_count++; + spin_unlock(&ip->i_lock); iplist[0] = ip; iplist[1] = dir; Index: linux-2.6/fs/minix/namei.c =================================================================== --- linux-2.6.orig/fs/minix/namei.c +++ linux-2.6/fs/minix/namei.c @@ -101,7 +101,9 @@ static int minix_link(struct dentry * ol inode->i_ctime = CURRENT_TIME_SEC; inode_inc_link_count(inode); - atomic_inc(&inode->i_count); + spin_lock(&inode->i_lock); + inode->i_count++; + spin_unlock(&inode->i_lock); return add_nondir(dentry, inode); } Index: linux-2.6/fs/nfs/inode.c =================================================================== --- linux-2.6.orig/fs/nfs/inode.c +++ linux-2.6/fs/nfs/inode.c @@ -377,7 +377,7 @@ nfs_fhget(struct super_block *sb, struct dprintk("NFS: nfs_fhget(%s/%Ld ct=%d)\n", inode->i_sb->s_id, (long long)NFS_FILEID(inode), - atomic_read(&inode->i_count)); + inode->i_count); out: return inode; @@ -1123,7 +1123,7 @@ static int nfs_update_inode(struct inode dfprintk(VFS, "NFS: %s(%s/%ld ct=%d info=0x%x)\n", __func__, inode->i_sb->s_id, inode->i_ino, - atomic_read(&inode->i_count), fattr->valid); + inode->i_count, fattr->valid); if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) goto out_fileid; Index: linux-2.6/fs/nilfs2/mdt.c =================================================================== --- linux-2.6.orig/fs/nilfs2/mdt.c +++ linux-2.6/fs/nilfs2/mdt.c @@ -479,7 +479,7 @@ nilfs_mdt_new_common(struct the_nilfs *n inode->i_sb = sb; /* sb may be NULL for some meta data files */ inode->i_blkbits = nilfs->ns_blocksize_bits; inode->i_flags = 0; - atomic_set(&inode->i_count, 1); + inode->i_count = 1; inode->i_nlink = 1; inode->i_ino = ino; inode->i_mode = S_IFREG; Index: linux-2.6/fs/nilfs2/namei.c =================================================================== --- linux-2.6.orig/fs/nilfs2/namei.c +++ linux-2.6/fs/nilfs2/namei.c @@ -219,7 +219,9 @@ static int nilfs_link(struct dentry *old inode->i_ctime = CURRENT_TIME; inode_inc_link_count(inode); - atomic_inc(&inode->i_count); + spin_lock(&inode->i_lock); + inode->i_count++; + spin_unlock(&inode->i_lock); err = nilfs_add_nondir(dentry, inode); if (!err) Index: linux-2.6/fs/ocfs2/namei.c =================================================================== --- linux-2.6.orig/fs/ocfs2/namei.c +++ linux-2.6/fs/ocfs2/namei.c @@ -722,7 +722,9 @@ static int ocfs2_link(struct dentry *old goto out_commit; } - atomic_inc(&inode->i_count); + spin_lock(&inode->i_lock); + inode->i_count++; + spin_unlock(&inode->i_lock); dentry->d_op = &ocfs2_dentry_ops; d_instantiate(dentry, inode); Index: linux-2.6/fs/reiserfs/file.c =================================================================== --- linux-2.6.orig/fs/reiserfs/file.c +++ linux-2.6/fs/reiserfs/file.c @@ -39,7 +39,7 @@ static int reiserfs_file_release(struct BUG_ON(!S_ISREG(inode->i_mode)); /* fast out for when nothing needs to be done */ - if ((atomic_read(&inode->i_count) > 1 || + if ((inode->i_count > 1 || !(REISERFS_I(inode)->i_flags & i_pack_on_close_mask) || !tail_has_to_be_packed(inode)) && REISERFS_I(inode)->i_prealloc_count <= 0) { @@ -94,7 +94,7 @@ static int reiserfs_file_release(struct if (!err) err = jbegin_failure; - if (!err && atomic_read(&inode->i_count) <= 1 && + if (!err && inode->i_count <= 1 && (REISERFS_I(inode)->i_flags & i_pack_on_close_mask) && tail_has_to_be_packed(inode)) { /* if regular file is released by last holder and it has been Index: linux-2.6/fs/reiserfs/namei.c =================================================================== --- linux-2.6.orig/fs/reiserfs/namei.c +++ linux-2.6/fs/reiserfs/namei.c @@ -1156,7 +1156,9 @@ static int reiserfs_link(struct dentry * inode->i_ctime = CURRENT_TIME_SEC; reiserfs_update_sd(&th, inode); - atomic_inc(&inode->i_count); + spin_lock(&inode->i_lock); + inode->i_count++; + spin_unlock(&inode->i_lock); d_instantiate(dentry, inode); retval = journal_end(&th, dir->i_sb, jbegin_count); reiserfs_write_unlock(dir->i_sb); Index: linux-2.6/fs/reiserfs/stree.c =================================================================== --- linux-2.6.orig/fs/reiserfs/stree.c +++ linux-2.6/fs/reiserfs/stree.c @@ -1477,7 +1477,7 @@ static int maybe_indirect_to_direct(stru ** reading in the last block. The user will hit problems trying to ** read the file, but for now we just skip the indirect2direct */ - if (atomic_read(&inode->i_count) > 1 || + if (inode->i_count > 1 || !tail_has_to_be_packed(inode) || !page || (REISERFS_I(inode)->i_flags & i_nopack_mask)) { /* leave tail in an unformatted node */ Index: linux-2.6/fs/sysv/namei.c =================================================================== --- linux-2.6.orig/fs/sysv/namei.c +++ linux-2.6/fs/sysv/namei.c @@ -126,7 +126,9 @@ static int sysv_link(struct dentry * old inode->i_ctime = CURRENT_TIME_SEC; inode_inc_link_count(inode); - atomic_inc(&inode->i_count); + spin_lock(&inode->i_lock); + inode->i_count++; + spin_unlock(&inode->i_lock); return add_nondir(dentry, inode); } Index: linux-2.6/fs/ubifs/dir.c =================================================================== --- linux-2.6.orig/fs/ubifs/dir.c +++ linux-2.6/fs/ubifs/dir.c @@ -550,7 +550,9 @@ static int ubifs_link(struct dentry *old lock_2_inodes(dir, inode); inc_nlink(inode); - atomic_inc(&inode->i_count); + spin_lock(&inode->i_lock); + inode->i_count++; + spin_unlock(&inode->i_lock); inode->i_ctime = ubifs_current_time(inode); dir->i_size += sz_change; dir_ui->ui_size = dir->i_size; Index: linux-2.6/fs/ubifs/super.c =================================================================== --- linux-2.6.orig/fs/ubifs/super.c +++ linux-2.6/fs/ubifs/super.c @@ -342,7 +342,7 @@ static void ubifs_delete_inode(struct in goto out; dbg_gen("inode %lu, mode %#x", inode->i_ino, (int)inode->i_mode); - ubifs_assert(!atomic_read(&inode->i_count)); + ubifs_assert(!inode->i_count); ubifs_assert(inode->i_nlink == 0); truncate_inode_pages(&inode->i_data, 0); Index: linux-2.6/fs/udf/namei.c =================================================================== --- linux-2.6.orig/fs/udf/namei.c +++ linux-2.6/fs/udf/namei.c @@ -1101,7 +1101,9 @@ static int udf_link(struct dentry *old_d inc_nlink(inode); inode->i_ctime = current_fs_time(inode->i_sb); mark_inode_dirty(inode); - atomic_inc(&inode->i_count); + spin_lock(&inode->i_lock); + inode->i_count++; + spin_unlock(&inode->i_lock); d_instantiate(dentry, inode); unlock_kernel(); Index: linux-2.6/fs/ufs/namei.c =================================================================== --- linux-2.6.orig/fs/ufs/namei.c +++ linux-2.6/fs/ufs/namei.c @@ -180,7 +180,9 @@ static int ufs_link (struct dentry * old inode->i_ctime = CURRENT_TIME_SEC; inode_inc_link_count(inode); - atomic_inc(&inode->i_count); + spin_lock(&inode->i_lock); + inode->i_count++; + spin_unlock(&inode->i_lock); error = ufs_add_nondir(dentry, inode); unlock_kernel(); Index: linux-2.6/fs/notify/inode_mark.c =================================================================== --- linux-2.6.orig/fs/notify/inode_mark.c +++ linux-2.6/fs/notify/inode_mark.c @@ -382,24 +382,30 @@ void fsnotify_unmount_inodes(struct list * evict all inodes with zero i_count from icache which is * unnecessarily violent and may in fact be illegal to do. */ - if (!atomic_read(&inode->i_count)) + if (!inode->i_count) continue; need_iput_tmp = need_iput; need_iput = NULL; /* In case fsnotify_inode_delete() drops a reference. */ - if (inode != need_iput_tmp) + if (inode != need_iput_tmp) { + spin_lock(&inode->i_lock); __iget(inode); - else + spin_unlock(&inode->i_lock); + } else need_iput_tmp = NULL; /* In case the dropping of a reference would nuke next_i. */ - if ((&next_i->i_sb_list != list) && - atomic_read(&next_i->i_count) && - !(next_i->i_state & (I_CLEAR | I_FREEING | I_WILL_FREE))) { - __iget(next_i); - need_iput = next_i; + if (&next_i->i_sb_list != list) { + spin_lock(&next_i->i_lock); + if (next_i->i_count && + !(next_i->i_state & + (I_CLEAR | I_FREEING | I_WILL_FREE))) { + __iget(next_i); + need_iput = next_i; + } + spin_unlock(&next_i->i_lock); } /* Index: linux-2.6/fs/ntfs/super.c =================================================================== --- linux-2.6.orig/fs/ntfs/super.c +++ linux-2.6/fs/ntfs/super.c @@ -2930,7 +2930,9 @@ static int ntfs_fill_super(struct super_ } if ((sb->s_root = d_alloc_root(vol->root_ino))) { /* We increment i_count simulating an ntfs_iget(). */ - atomic_inc(&vol->root_ino->i_count); + spin_lock(&vol->root_ino->i_lock); + vol->root_ino->i_count++; + spin_unlock(&vol->root_ino->i_lock); ntfs_debug("Exiting, status successful."); /* Release the default upcase if it has no users. */ mutex_lock(&ntfs_lock); Index: linux-2.6/fs/cifs/inode.c =================================================================== --- linux-2.6.orig/fs/cifs/inode.c +++ linux-2.6/fs/cifs/inode.c @@ -1612,7 +1612,7 @@ int cifs_revalidate_dentry(struct dentry } cFYI(1, "Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld " - "jiffies %ld", full_path, inode, inode->i_count.counter, + "jiffies %ld", full_path, inode, inode->i_count, dentry, dentry->d_time, jiffies); if (CIFS_SB(sb)->tcon->unix_ext) Index: linux-2.6/fs/xfs/linux-2.6/xfs_trace.h =================================================================== --- linux-2.6.orig/fs/xfs/linux-2.6/xfs_trace.h +++ linux-2.6/fs/xfs/linux-2.6/xfs_trace.h @@ -576,7 +576,7 @@ DECLARE_EVENT_CLASS(xfs_inode_class, TP_fast_assign( __entry->dev = VFS_I(ip)->i_sb->s_dev; __entry->ino = ip->i_ino; - __entry->count = atomic_read(&VFS_I(ip)->i_count); + __entry->count = VFS_I(ip)->i_count; __entry->pincount = atomic_read(&ip->i_pincount); __entry->caller_ip = caller_ip; ), Index: linux-2.6/net/socket.c =================================================================== --- linux-2.6.orig/net/socket.c +++ linux-2.6/net/socket.c @@ -386,7 +386,9 @@ static int sock_alloc_file(struct socket &socket_file_ops); if (unlikely(!file)) { /* drop dentry, keep inode */ - atomic_inc(&path.dentry->d_inode->i_count); + spin_lock(&path.dentry->d_inode->i_lock); + path.dentry->d_inode->i_count++; + spin_unlock(&path.dentry->d_inode->i_lock); path_put(&path); put_unused_fd(fd); return -ENFILE; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/