redonkable/remarkable-linux
redonkable/remarkable-linux
1
0
Fork 0
Code Releases Activity

kill-the-bkl/reiserfs: fix recursive reiserfs write lock in reiserfs_commit_write()

Browse source 
reiserfs_commit_write() is always called with the write lock held.
Thus the current calls to reiserfs_write_lock() in this function are
acquiring the lock recursively.
We can safely drop them.

This also solves further assumptions for this lock to be really
released while calling reiserfs_write_unlock().

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jeff Mahoney <jeffm@suse.com>
Cc: Chris Mason <chris.mason@oracle.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Alexander Beregalov <a.beregalov@gmail.com>
Cc: Laurent Riffard <laurent.riffard@free.fr>
This commit is contained in:
Frederic Weisbecker 2009-08-25 03:38:12 +02:00
parent b10ab4c337
commit 7e94277050
1 changed files with 2 additions and 9 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

11
fs/reiserfs/inode.c
View file

@ -2795,7 +2795,6 @@ int reiserfs_commit_write(struct file *f, struct page *page,
*/
if (pos > inode->i_size) {
struct reiserfs_transaction_handle myth;
reiserfs_write_lock(inode->i_sb);
/* If the file have grown beyond the border where it
can have a tail, unmark it as needing a tail
packing */
@ -2806,10 +2805,9 @@ int reiserfs_commit_write(struct file *f, struct page *page,
REISERFS_I(inode)->i_flags &= ~i_pack_on_close_mask;
ret = journal_begin(&myth, inode->i_sb, 1);
if (ret) {
reiserfs_write_unlock(inode->i_sb);
if (ret)
goto journal_error;
}
reiserfs_update_inode_transaction(inode);
inode->i_size = pos;
/*
@ -2821,16 +2819,13 @@ int reiserfs_commit_write(struct file *f, struct page *page,
reiserfs_update_sd(&myth, inode);
update_sd = 1;
ret = journal_end(&myth, inode->i_sb, 1);
reiserfs_write_unlock(inode->i_sb);
if (ret)
goto journal_error;
}
if (th) {
reiserfs_write_lock(inode->i_sb);
if (!update_sd)
mark_inode_dirty(inode);
ret = reiserfs_end_persistent_transaction(th);
reiserfs_write_unlock(inode->i_sb);
if (ret)
goto out;
}
@ -2840,11 +2835,9 @@ int reiserfs_commit_write(struct file *f, struct page *page,
journal_error:
if (th) {
reiserfs_write_lock(inode->i_sb);
if (!update_sd)
reiserfs_update_sd(th, inode);
ret = reiserfs_end_persistent_transaction(th);
reiserfs_write_unlock(inode->i_sb);
}
return ret;