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[PATCH] mutex subsystem, semaphore to mutex: VFS, ->i_sem

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This patch converts the inode semaphore to a mutex. I have tested it on
XFS and compiled as much as one can consider on an ia64. Anyway your
luck with it might be different.

Modified-by: Ingo Molnar <[email protected]>

(finished the conversion)

Signed-off-by: Jes Sorensen <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
This commit is contained in:
Jes Sorensen 2006-01-09 15:59:24 -08:00 • committed by Ingo Molnar
commit 1b1dcc1b57
113 changed files with 563 additions and 573 deletions
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12
fs/namespace.c
View file

@ -814,7 +814,7 @@ static int graft_tree(struct vfsmount *mnt, struct nameidata *nd)
return -ENOTDIR;
err = -ENOENT;
down(&nd->dentry->d_inode->i_sem);
mutex_lock(&nd->dentry->d_inode->i_mutex);
if (IS_DEADDIR(nd->dentry->d_inode))
goto out_unlock;
@ -826,7 +826,7 @@ static int graft_tree(struct vfsmount *mnt, struct nameidata *nd)
if (IS_ROOT(nd->dentry) || !d_unhashed(nd->dentry))
err = attach_recursive_mnt(mnt, nd, NULL);
out_unlock:
up(&nd->dentry->d_inode->i_sem);
mutex_unlock(&nd->dentry->d_inode->i_mutex);
if (!err)
security_sb_post_addmount(mnt, nd);
return err;
@ -962,7 +962,7 @@ static int do_move_mount(struct nameidata *nd, char *old_name)
goto out;
err = -ENOENT;
down(&nd->dentry->d_inode->i_sem);
mutex_lock(&nd->dentry->d_inode->i_mutex);
if (IS_DEADDIR(nd->dentry->d_inode))
goto out1;
@ -1004,7 +1004,7 @@ static int do_move_mount(struct nameidata *nd, char *old_name)
list_del_init(&old_nd.mnt->mnt_expire);
spin_unlock(&vfsmount_lock);
out1:
up(&nd->dentry->d_inode->i_sem);
mutex_unlock(&nd->dentry->d_inode->i_mutex);
out:
up_write(&namespace_sem);
if (!err)
@ -1573,7 +1573,7 @@ asmlinkage long sys_pivot_root(const char __user * new_root,
user_nd.dentry = dget(current->fs->root);
read_unlock(&current->fs->lock);
down_write(&namespace_sem);
down(&old_nd.dentry->d_inode->i_sem);
mutex_lock(&old_nd.dentry->d_inode->i_mutex);
error = -EINVAL;
if (IS_MNT_SHARED(old_nd.mnt) ||
IS_MNT_SHARED(new_nd.mnt->mnt_parent) ||
@ -1626,7 +1626,7 @@ asmlinkage long sys_pivot_root(const char __user * new_root,
path_release(&root_parent);
path_release(&parent_nd);
out2:
up(&old_nd.dentry->d_inode->i_sem);
mutex_unlock(&old_nd.dentry->d_inode->i_mutex);
up_write(&namespace_sem);
path_release(&user_nd);
path_release(&old_nd);