Commit 1b1dcc1b authored by Jes Sorensen's avatar Jes Sorensen Committed by Ingo Molnar
Browse files

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



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: default avatarIngo Molnar <mingo@elte.hu>

(finished the conversion)

Signed-off-by: default avatarJes Sorensen <jes@sgi.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 794ee1ba

arch/powerpc/platforms/cell/spufs/inode.c

+6 −6
Original line number Diff line number Diff line
@@ -137,7 +137,7 @@ spufs_delete_inode(struct inode *inode) 
static void spufs_prune_dir(struct dentry *dir)

{

	struct dentry *dentry, *tmp;

	down(&dir->d_inode->i_sem);

	mutex_lock(&dir->d_inode->i_mutex);

	list_for_each_entry_safe(dentry, tmp, &dir->d_subdirs, d_child) {

		spin_lock(&dcache_lock);

		spin_lock(&dentry->d_lock);
@@ -154,7 +154,7 @@ static void spufs_prune_dir(struct dentry *dir) 
		}

	}

	shrink_dcache_parent(dir);

	up(&dir->d_inode->i_sem);

	mutex_unlock(&dir->d_inode->i_mutex);

}



static int spufs_rmdir(struct inode *root, struct dentry *dir_dentry)
@@ -162,15 +162,15 @@ static int spufs_rmdir(struct inode *root, struct dentry *dir_dentry) 
	struct spu_context *ctx;



	/* remove all entries */

	down(&root->i_sem);

	mutex_lock(&root->i_mutex);

	spufs_prune_dir(dir_dentry);

	up(&root->i_sem);

	mutex_unlock(&root->i_mutex);



	/* We have to give up the mm_struct */

	ctx = SPUFS_I(dir_dentry->d_inode)->i_ctx;

	spu_forget(ctx);



	/* XXX Do we need to hold i_sem here ? */

	/* XXX Do we need to hold i_mutex here ? */

	return simple_rmdir(root, dir_dentry);

}
@@ -330,7 +330,7 @@ long spufs_create_thread(struct nameidata *nd, 
out_dput:

	dput(dentry);

out_dir:

	up(&nd->dentry->d_inode->i_sem);

	mutex_unlock(&nd->dentry->d_inode->i_mutex);

out:

	return ret;

}

drivers/block/loop.c

+2 −2
Original line number Diff line number Diff line
@@ -215,7 +215,7 @@ static int do_lo_send_aops(struct loop_device *lo, struct bio_vec *bvec, 
	unsigned offset, bv_offs;

	int len, ret;



	down(&mapping->host->i_sem);

	mutex_lock(&mapping->host->i_mutex);

	index = pos >> PAGE_CACHE_SHIFT;

	offset = pos & ((pgoff_t)PAGE_CACHE_SIZE - 1);

	bv_offs = bvec->bv_offset;
@@ -278,7 +278,7 @@ static int do_lo_send_aops(struct loop_device *lo, struct bio_vec *bvec, 
	}

	ret = 0;

out:

	up(&mapping->host->i_sem);

	mutex_unlock(&mapping->host->i_mutex);

	return ret;

unlock:

	unlock_page(page);

drivers/char/mem.c

+2 −2
Original line number Diff line number Diff line
@@ -741,7 +741,7 @@ static loff_t memory_lseek(struct file * file, loff_t offset, int orig) 
{

	loff_t ret;



	down(&file->f_dentry->d_inode->i_sem);

	mutex_lock(&file->f_dentry->d_inode->i_mutex);

	switch (orig) {

		case 0:

			file->f_pos = offset;
@@ -756,7 +756,7 @@ static loff_t memory_lseek(struct file * file, loff_t offset, int orig) 
		default:

			ret = -EINVAL;

	}

	up(&file->f_dentry->d_inode->i_sem);

	mutex_unlock(&file->f_dentry->d_inode->i_mutex);

	return ret;

}

drivers/isdn/capi/capifs.c

+3 −3
Original line number Diff line number Diff line
@@ -138,7 +138,7 @@ static struct dentry *get_node(int num) 
{

	char s[10];

	struct dentry *root = capifs_root;

	down(&root->d_inode->i_sem);

	mutex_lock(&root->d_inode->i_mutex);

	return lookup_one_len(s, root, sprintf(s, "%d", num));

}
@@ -159,7 +159,7 @@ void capifs_new_ncci(unsigned int number, dev_t device) 
	dentry = get_node(number);

	if (!IS_ERR(dentry) && !dentry->d_inode)

		d_instantiate(dentry, inode);

	up(&capifs_root->d_inode->i_sem);

	mutex_unlock(&capifs_root->d_inode->i_mutex);

}



void capifs_free_ncci(unsigned int number)
@@ -175,7 +175,7 @@ void capifs_free_ncci(unsigned int number) 
		}

		dput(dentry);

	}

	up(&capifs_root->d_inode->i_sem);

	mutex_unlock(&capifs_root->d_inode->i_mutex);

}



static int __init capifs_init(void)

drivers/md/dm.c

+2 −2
Original line number Diff line number Diff line
@@ -837,9 +837,9 @@ static void __set_size(struct mapped_device *md, sector_t size) 
{

	set_capacity(md->disk, size);



	down(&md->suspended_bdev->bd_inode->i_sem);

	mutex_lock(&md->suspended_bdev->bd_inode->i_mutex);

	i_size_write(md->suspended_bdev->bd_inode, (loff_t)size << SECTOR_SHIFT);

	up(&md->suspended_bdev->bd_inode->i_sem);

	mutex_unlock(&md->suspended_bdev->bd_inode->i_mutex);

}



static int __bind(struct mapped_device *md, struct dm_table *t)

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