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-rw-r--r--fs/btrfs/extent-tree.c13
-rw-r--r--fs/btrfs/inode.c5
-rw-r--r--fs/btrfs/ioctl.c18
-rw-r--r--fs/btrfs/transaction.c4
-rw-r--r--fs/configfs/item.c4
-rw-r--r--fs/jfs/file.c2
-rw-r--r--fs/jfs/inode.c4
-rw-r--r--fs/jfs/namei.c27
-rw-r--r--fs/locks.c38
-rw-r--r--fs/nfs/nfs4proc.c18
-rw-r--r--fs/proc/Kconfig6
-rw-r--r--fs/proc/base.c5
-rw-r--r--fs/proc/kcore.c4
-rw-r--r--fs/udf/inode.c19
14 files changed, 98 insertions, 69 deletions
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 1c2bd1723e40..171312d51799 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -2296,9 +2296,22 @@ static int run_one_delayed_ref(struct btrfs_trans_handle *trans,
static inline struct btrfs_delayed_ref_node *
select_delayed_ref(struct btrfs_delayed_ref_head *head)
{
+ struct btrfs_delayed_ref_node *ref;
+
if (list_empty(&head->ref_list))
return NULL;
+ /*
+ * Select a delayed ref of type BTRFS_ADD_DELAYED_REF first.
+ * This is to prevent a ref count from going down to zero, which deletes
+ * the extent item from the extent tree, when there still are references
+ * to add, which would fail because they would not find the extent item.
+ */
+ list_for_each_entry(ref, &head->ref_list, list) {
+ if (ref->action == BTRFS_ADD_DELAYED_REF)
+ return ref;
+ }
+
return list_entry(head->ref_list.next, struct btrfs_delayed_ref_node,
list);
}
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index b33c0cf02668..e33dff356460 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -4209,7 +4209,7 @@ int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
u64 extent_num_bytes = 0;
u64 extent_offset = 0;
u64 item_end = 0;
- u64 last_size = (u64)-1;
+ u64 last_size = new_size;
u32 found_type = (u8)-1;
int found_extent;
int del_item;
@@ -4493,8 +4493,7 @@ out:
btrfs_abort_transaction(trans, root, ret);
}
error:
- if (last_size != (u64)-1 &&
- root->root_key.objectid != BTRFS_TREE_LOG_OBJECTID)
+ if (root->root_key.objectid != BTRFS_TREE_LOG_OBJECTID)
btrfs_ordered_update_i_size(inode, last_size, NULL);
btrfs_free_path(path);
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 5d91776e12a2..0770c91586ca 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -3090,7 +3090,7 @@ out_unlock:
static long btrfs_ioctl_file_extent_same(struct file *file,
struct btrfs_ioctl_same_args __user *argp)
{
- struct btrfs_ioctl_same_args *same;
+ struct btrfs_ioctl_same_args *same = NULL;
struct btrfs_ioctl_same_extent_info *info;
struct inode *src = file_inode(file);
u64 off;
@@ -3120,6 +3120,7 @@ static long btrfs_ioctl_file_extent_same(struct file *file,
if (IS_ERR(same)) {
ret = PTR_ERR(same);
+ same = NULL;
goto out;
}
@@ -3190,6 +3191,7 @@ static long btrfs_ioctl_file_extent_same(struct file *file,
out:
mnt_drop_write_file(file);
+ kfree(same);
return ret;
}
@@ -3586,6 +3588,20 @@ process_slot:
u64 trim = 0;
u64 aligned_end = 0;
+ /*
+ * Don't copy an inline extent into an offset
+ * greater than zero. Having an inline extent
+ * at such an offset results in chaos as btrfs
+ * isn't prepared for such cases. Just skip
+ * this case for the same reasons as commented
+ * at btrfs_ioctl_clone().
+ */
+ if (last_dest_end > 0) {
+ ret = -EOPNOTSUPP;
+ btrfs_end_transaction(trans, root);
+ goto out;
+ }
+
if (off > key.offset) {
skip = off - key.offset;
new_key.offset += skip;
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index c0f18e7266b6..51e0f0d0053e 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -761,7 +761,7 @@ static int __btrfs_end_transaction(struct btrfs_trans_handle *trans,
if (!list_empty(&trans->ordered)) {
spin_lock(&info->trans_lock);
- list_splice(&trans->ordered, &cur_trans->pending_ordered);
+ list_splice_init(&trans->ordered, &cur_trans->pending_ordered);
spin_unlock(&info->trans_lock);
}
@@ -1866,7 +1866,7 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
}
spin_lock(&root->fs_info->trans_lock);
- list_splice(&trans->ordered, &cur_trans->pending_ordered);
+ list_splice_init(&trans->ordered, &cur_trans->pending_ordered);
if (cur_trans->state >= TRANS_STATE_COMMIT_START) {
spin_unlock(&root->fs_info->trans_lock);
atomic_inc(&cur_trans->use_count);
diff --git a/fs/configfs/item.c b/fs/configfs/item.c
index 4d6a30e76168..b863a09cd2f1 100644
--- a/fs/configfs/item.c
+++ b/fs/configfs/item.c
@@ -115,7 +115,7 @@ void config_item_init_type_name(struct config_item *item,
const char *name,
struct config_item_type *type)
{
- config_item_set_name(item, name);
+ config_item_set_name(item, "%s", name);
item->ci_type = type;
config_item_init(item);
}
@@ -124,7 +124,7 @@ EXPORT_SYMBOL(config_item_init_type_name);
void config_group_init_type_name(struct config_group *group, const char *name,
struct config_item_type *type)
{
- config_item_set_name(&group->cg_item, name);
+ config_item_set_name(&group->cg_item, "%s", name);
group->cg_item.ci_type = type;
config_group_init(group);
}
diff --git a/fs/jfs/file.c b/fs/jfs/file.c
index e98d39d75cf4..b9dc23cd04f2 100644
--- a/fs/jfs/file.c
+++ b/fs/jfs/file.c
@@ -76,7 +76,7 @@ static int jfs_open(struct inode *inode, struct file *file)
if (ji->active_ag == -1) {
struct jfs_sb_info *jfs_sb = JFS_SBI(inode->i_sb);
ji->active_ag = BLKTOAG(addressPXD(&ji->ixpxd), jfs_sb);
- atomic_inc( &jfs_sb->bmap->db_active[ji->active_ag]);
+ atomic_inc(&jfs_sb->bmap->db_active[ji->active_ag]);
}
spin_unlock_irq(&ji->ag_lock);
}
diff --git a/fs/jfs/inode.c b/fs/jfs/inode.c
index 6f1cb2b5ee28..41aa3ca6a6a4 100644
--- a/fs/jfs/inode.c
+++ b/fs/jfs/inode.c
@@ -134,11 +134,11 @@ int jfs_write_inode(struct inode *inode, struct writeback_control *wbc)
* It has been committed since the last change, but was still
* on the dirty inode list.
*/
- if (!test_cflag(COMMIT_Dirty, inode)) {
+ if (!test_cflag(COMMIT_Dirty, inode)) {
/* Make sure committed changes hit the disk */
jfs_flush_journal(JFS_SBI(inode->i_sb)->log, wait);
return 0;
- }
+ }
if (jfs_commit_inode(inode, wait)) {
jfs_err("jfs_write_inode: jfs_commit_inode failed!");
diff --git a/fs/jfs/namei.c b/fs/jfs/namei.c
index e33be921aa41..a5ac97b9a933 100644
--- a/fs/jfs/namei.c
+++ b/fs/jfs/namei.c
@@ -1160,7 +1160,7 @@ static int jfs_rename(struct inode *old_dir, struct dentry *old_dentry,
rc = dtModify(tid, new_dir, &new_dname, &ino,
old_ip->i_ino, JFS_RENAME);
if (rc)
- goto out4;
+ goto out_tx;
drop_nlink(new_ip);
if (S_ISDIR(new_ip->i_mode)) {
drop_nlink(new_ip);
@@ -1185,7 +1185,7 @@ static int jfs_rename(struct inode *old_dir, struct dentry *old_dentry,
if ((new_size = commitZeroLink(tid, new_ip)) < 0) {
txAbort(tid, 1); /* Marks FS Dirty */
rc = new_size;
- goto out4;
+ goto out_tx;
}
tblk = tid_to_tblock(tid);
tblk->xflag |= COMMIT_DELETE;
@@ -1203,7 +1203,7 @@ static int jfs_rename(struct inode *old_dir, struct dentry *old_dentry,
if (rc) {
jfs_err("jfs_rename didn't expect dtSearch to fail "
"w/rc = %d", rc);
- goto out4;
+ goto out_tx;
}
ino = old_ip->i_ino;
@@ -1211,7 +1211,7 @@ static int jfs_rename(struct inode *old_dir, struct dentry *old_dentry,
if (rc) {
if (rc == -EIO)
jfs_err("jfs_rename: dtInsert returned -EIO");
- goto out4;
+ goto out_tx;
}
if (S_ISDIR(old_ip->i_mode))
inc_nlink(new_dir);
@@ -1226,7 +1226,7 @@ static int jfs_rename(struct inode *old_dir, struct dentry *old_dentry,
jfs_err("jfs_rename did not expect dtDelete to return rc = %d",
rc);
txAbort(tid, 1); /* Marks Filesystem dirty */
- goto out4;
+ goto out_tx;
}
if (S_ISDIR(old_ip->i_mode)) {
drop_nlink(old_dir);
@@ -1285,7 +1285,7 @@ static int jfs_rename(struct inode *old_dir, struct dentry *old_dentry,
rc = txCommit(tid, ipcount, iplist, commit_flag);
- out4:
+ out_tx:
txEnd(tid);
if (new_ip)
mutex_unlock(&JFS_IP(new_ip)->commit_mutex);
@@ -1308,13 +1308,6 @@ static int jfs_rename(struct inode *old_dir, struct dentry *old_dentry,
}
if (new_ip && (new_ip->i_nlink == 0))
set_cflag(COMMIT_Nolink, new_ip);
- out3:
- free_UCSname(&new_dname);
- out2:
- free_UCSname(&old_dname);
- out1:
- if (new_ip && !S_ISDIR(new_ip->i_mode))
- IWRITE_UNLOCK(new_ip);
/*
* Truncating the directory index table is not guaranteed. It
* may need to be done iteratively
@@ -1325,7 +1318,13 @@ static int jfs_rename(struct inode *old_dir, struct dentry *old_dentry,
clear_cflag(COMMIT_Stale, old_dir);
}
-
+ if (new_ip && !S_ISDIR(new_ip->i_mode))
+ IWRITE_UNLOCK(new_ip);
+ out3:
+ free_UCSname(&new_dname);
+ out2:
+ free_UCSname(&old_dname);
+ out1:
jfs_info("jfs_rename: returning %d", rc);
return rc;
}
diff --git a/fs/locks.c b/fs/locks.c
index 653faabb07f4..d3d558ba4da7 100644
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -862,12 +862,11 @@ static int posix_locks_deadlock(struct file_lock *caller_fl,
* whether or not a lock was successfully freed by testing the return
* value for -ENOENT.
*/
-static int flock_lock_file(struct file *filp, struct file_lock *request)
+static int flock_lock_inode(struct inode *inode, struct file_lock *request)
{
struct file_lock *new_fl = NULL;
struct file_lock *fl;
struct file_lock_context *ctx;
- struct inode *inode = file_inode(filp);
int error = 0;
bool found = false;
LIST_HEAD(dispose);
@@ -890,7 +889,7 @@ static int flock_lock_file(struct file *filp, struct file_lock *request)
goto find_conflict;
list_for_each_entry(fl, &ctx->flc_flock, fl_list) {
- if (filp != fl->fl_file)
+ if (request->fl_file != fl->fl_file)
continue;
if (request->fl_type == fl->fl_type)
goto out;
@@ -1164,20 +1163,19 @@ int posix_lock_file(struct file *filp, struct file_lock *fl,
EXPORT_SYMBOL(posix_lock_file);
/**
- * posix_lock_file_wait - Apply a POSIX-style lock to a file
- * @filp: The file to apply the lock to
+ * posix_lock_inode_wait - Apply a POSIX-style lock to a file
+ * @inode: inode of file to which lock request should be applied
* @fl: The lock to be applied
*
- * Add a POSIX style lock to a file.
- * We merge adjacent & overlapping locks whenever possible.
- * POSIX locks are sorted by owner task, then by starting address
+ * Variant of posix_lock_file_wait that does not take a filp, and so can be
+ * used after the filp has already been torn down.
*/
-int posix_lock_file_wait(struct file *filp, struct file_lock *fl)
+int posix_lock_inode_wait(struct inode *inode, struct file_lock *fl)
{
int error;
might_sleep ();
for (;;) {
- error = posix_lock_file(filp, fl, NULL);
+ error = __posix_lock_file(inode, fl, NULL);
if (error != FILE_LOCK_DEFERRED)
break;
error = wait_event_interruptible(fl->fl_wait, !fl->fl_next);
@@ -1189,7 +1187,7 @@ int posix_lock_file_wait(struct file *filp, struct file_lock *fl)
}
return error;
}
-EXPORT_SYMBOL(posix_lock_file_wait);
+EXPORT_SYMBOL(posix_lock_inode_wait);
/**
* locks_mandatory_locked - Check for an active lock
@@ -1851,18 +1849,18 @@ int fcntl_setlease(unsigned int fd, struct file *filp, long arg)
}
/**
- * flock_lock_file_wait - Apply a FLOCK-style lock to a file
- * @filp: The file to apply the lock to
+ * flock_lock_inode_wait - Apply a FLOCK-style lock to a file
+ * @inode: inode of the file to apply to
* @fl: The lock to be applied
*
- * Add a FLOCK style lock to a file.
+ * Apply a FLOCK style lock request to an inode.
*/
-int flock_lock_file_wait(struct file *filp, struct file_lock *fl)
+int flock_lock_inode_wait(struct inode *inode, struct file_lock *fl)
{
int error;
might_sleep();
for (;;) {
- error = flock_lock_file(filp, fl);
+ error = flock_lock_inode(inode, fl);
if (error != FILE_LOCK_DEFERRED)
break;
error = wait_event_interruptible(fl->fl_wait, !fl->fl_next);
@@ -1874,8 +1872,7 @@ int flock_lock_file_wait(struct file *filp, struct file_lock *fl)
}
return error;
}
-
-EXPORT_SYMBOL(flock_lock_file_wait);
+EXPORT_SYMBOL(flock_lock_inode_wait);
/**
* sys_flock: - flock() system call.
@@ -2401,7 +2398,8 @@ locks_remove_flock(struct file *filp)
.fl_type = F_UNLCK,
.fl_end = OFFSET_MAX,
};
- struct file_lock_context *flctx = file_inode(filp)->i_flctx;
+ struct inode *inode = file_inode(filp);
+ struct file_lock_context *flctx = inode->i_flctx;
if (list_empty(&flctx->flc_flock))
return;
@@ -2409,7 +2407,7 @@ locks_remove_flock(struct file *filp)
if (filp->f_op->flock)
filp->f_op->flock(filp, F_SETLKW, &fl);
else
- flock_lock_file(filp, &fl);
+ flock_lock_inode(inode, &fl);
if (fl.fl_ops && fl.fl_ops->fl_release_private)
fl.fl_ops->fl_release_private(&fl);
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 6f228b5af819..8bee93469617 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -5439,15 +5439,15 @@ static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *
return err;
}
-static int do_vfs_lock(struct file *file, struct file_lock *fl)
+static int do_vfs_lock(struct inode *inode, struct file_lock *fl)
{
int res = 0;
switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
case FL_POSIX:
- res = posix_lock_file_wait(file, fl);
+ res = posix_lock_inode_wait(inode, fl);
break;
case FL_FLOCK:
- res = flock_lock_file_wait(file, fl);
+ res = flock_lock_inode_wait(inode, fl);
break;
default:
BUG();
@@ -5484,7 +5484,6 @@ static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
atomic_inc(&lsp->ls_count);
/* Ensure we don't close file until we're done freeing locks! */
p->ctx = get_nfs_open_context(ctx);
- get_file(fl->fl_file);
memcpy(&p->fl, fl, sizeof(p->fl));
p->server = NFS_SERVER(inode);
return p;
@@ -5496,7 +5495,6 @@ static void nfs4_locku_release_calldata(void *data)
nfs_free_seqid(calldata->arg.seqid);
nfs4_put_lock_state(calldata->lsp);
put_nfs_open_context(calldata->ctx);
- fput(calldata->fl.fl_file);
kfree(calldata);
}
@@ -5509,7 +5507,7 @@ static void nfs4_locku_done(struct rpc_task *task, void *data)
switch (task->tk_status) {
case 0:
renew_lease(calldata->server, calldata->timestamp);
- do_vfs_lock(calldata->fl.fl_file, &calldata->fl);
+ do_vfs_lock(calldata->lsp->ls_state->inode, &calldata->fl);
if (nfs4_update_lock_stateid(calldata->lsp,
&calldata->res.stateid))
break;
@@ -5617,7 +5615,7 @@ static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *
mutex_lock(&sp->so_delegreturn_mutex);
/* Exclude nfs4_reclaim_open_stateid() - note nesting! */
down_read(&nfsi->rwsem);
- if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
+ if (do_vfs_lock(inode, request) == -ENOENT) {
up_read(&nfsi->rwsem);
mutex_unlock(&sp->so_delegreturn_mutex);
goto out;
@@ -5758,7 +5756,7 @@ static void nfs4_lock_done(struct rpc_task *task, void *calldata)
data->timestamp);
if (data->arg.new_lock) {
data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
- if (do_vfs_lock(data->fl.fl_file, &data->fl) < 0) {
+ if (do_vfs_lock(lsp->ls_state->inode, &data->fl) < 0) {
rpc_restart_call_prepare(task);
break;
}
@@ -6000,7 +5998,7 @@ static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock
if (status != 0)
goto out;
request->fl_flags |= FL_ACCESS;
- status = do_vfs_lock(request->fl_file, request);
+ status = do_vfs_lock(state->inode, request);
if (status < 0)
goto out;
down_read(&nfsi->rwsem);
@@ -6008,7 +6006,7 @@ static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock
/* Yes: cache locks! */
/* ...but avoid races with delegation recall... */
request->fl_flags = fl_flags & ~FL_SLEEP;
- status = do_vfs_lock(request->fl_file, request);
+ status = do_vfs_lock(state->inode, request);
up_read(&nfsi->rwsem);
goto out;
}
diff --git a/fs/proc/Kconfig b/fs/proc/Kconfig
index d751fcb637bb..1ade1206bb89 100644
--- a/fs/proc/Kconfig
+++ b/fs/proc/Kconfig
@@ -75,3 +75,9 @@ config PROC_PAGE_MONITOR
config PROC_CHILDREN
bool "Include /proc/<pid>/task/<tid>/children file"
default n
+ help
+ Provides a fast way to retrieve first level children pids of a task. See
+ <file:Documentation/filesystems/proc.txt> for more information.
+
+ Say Y if you are running any user-space software which takes benefit from
+ this interface. For example, rkt is such a piece of software.
diff --git a/fs/proc/base.c b/fs/proc/base.c
index 87782e874b6a..aa50d1ac28fc 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -243,6 +243,11 @@ static ssize_t proc_pid_cmdline_read(struct file *file, char __user *buf,
len1 = arg_end - arg_start;
len2 = env_end - env_start;
+ /* Empty ARGV. */
+ if (len1 == 0) {
+ rv = 0;
+ goto out_free_page;
+ }
/*
* Inherently racy -- command line shares address space
* with code and data.
diff --git a/fs/proc/kcore.c b/fs/proc/kcore.c
index 91a4e6426321..92e6726f6e37 100644
--- a/fs/proc/kcore.c
+++ b/fs/proc/kcore.c
@@ -92,7 +92,7 @@ static size_t get_kcore_size(int *nphdr, size_t *elf_buflen)
roundup(sizeof(CORE_STR), 4)) +
roundup(sizeof(struct elf_prstatus), 4) +
roundup(sizeof(struct elf_prpsinfo), 4) +
- roundup(sizeof(struct task_struct), 4);
+ roundup(arch_task_struct_size, 4);
*elf_buflen = PAGE_ALIGN(*elf_buflen);
return size + *elf_buflen;
}
@@ -415,7 +415,7 @@ static void elf_kcore_store_hdr(char *bufp, int nphdr, int dataoff)
/* set up the task structure */
notes[2].name = CORE_STR;
notes[2].type = NT_TASKSTRUCT;
- notes[2].datasz = sizeof(struct task_struct);
+ notes[2].datasz = arch_task_struct_size;
notes[2].data = current;
nhdr->p_filesz += notesize(&notes[2]);
diff --git a/fs/udf/inode.c b/fs/udf/inode.c
index 6afac3d561ac..8d0b3ade0ff0 100644
--- a/fs/udf/inode.c
+++ b/fs/udf/inode.c
@@ -1652,17 +1652,9 @@ static int udf_update_inode(struct inode *inode, int do_sync)
iinfo->i_ext.i_data, inode->i_sb->s_blocksize -
sizeof(struct unallocSpaceEntry));
use->descTag.tagIdent = cpu_to_le16(TAG_IDENT_USE);
- use->descTag.tagLocation =
- cpu_to_le32(iinfo->i_location.logicalBlockNum);
- crclen = sizeof(struct unallocSpaceEntry) +
- iinfo->i_lenAlloc - sizeof(struct tag);
- use->descTag.descCRCLength = cpu_to_le16(crclen);
- use->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)use +
- sizeof(struct tag),
- crclen));
- use->descTag.tagChecksum = udf_tag_checksum(&use->descTag);
+ crclen = sizeof(struct unallocSpaceEntry);
- goto out;
+ goto finish;
}
if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_FORGET))
@@ -1782,6 +1774,8 @@ static int udf_update_inode(struct inode *inode, int do_sync)
efe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_EFE);
crclen = sizeof(struct extendedFileEntry);
}
+
+finish:
if (iinfo->i_strat4096) {
fe->icbTag.strategyType = cpu_to_le16(4096);
fe->icbTag.strategyParameter = cpu_to_le16(1);
@@ -1791,7 +1785,9 @@ static int udf_update_inode(struct inode *inode, int do_sync)
fe->icbTag.numEntries = cpu_to_le16(1);
}
- if (S_ISDIR(inode->i_mode))
+ if (iinfo->i_use)
+ fe->icbTag.fileType = ICBTAG_FILE_TYPE_USE;
+ else if (S_ISDIR(inode->i_mode))
fe->icbTag.fileType = ICBTAG_FILE_TYPE_DIRECTORY;
else if (S_ISREG(inode->i_mode))
fe->icbTag.fileType = ICBTAG_FILE_TYPE_REGULAR;
@@ -1828,7 +1824,6 @@ static int udf_update_inode(struct inode *inode, int do_sync)
crclen));
fe->descTag.tagChecksum = udf_tag_checksum(&fe->descTag);
-out:
set_buffer_uptodate(bh);
unlock_buffer(bh);
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