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Commit 8f5fed1e authored by Sasha Levin's avatar Sasha Levin Committed by Al Viro
Browse files

fs/9p: use fscache mutex rather than spinlock 



We may sleep inside a the lock, so use a mutex rather than spinlock.

Signed-off-by: default avatarSasha Levin <sasha.levin@oracle.com>
Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent 3cc4a84e

fs/9p/cache.c

+4 −4
Original line number Diff line number Diff line
@@ -243,14 +243,14 @@ void v9fs_cache_inode_set_cookie(struct inode *inode, struct file *filp) 
	if (!v9inode->fscache)

		return;



	spin_lock(&v9inode->fscache_lock);

	mutex_lock(&v9inode->fscache_lock);



	if ((filp->f_flags & O_ACCMODE) != O_RDONLY)

		v9fs_cache_inode_flush_cookie(inode);

	else

		v9fs_cache_inode_get_cookie(inode);



	spin_unlock(&v9inode->fscache_lock);

	mutex_unlock(&v9inode->fscache_lock);

}



void v9fs_cache_inode_reset_cookie(struct inode *inode)
@@ -264,7 +264,7 @@ void v9fs_cache_inode_reset_cookie(struct inode *inode) 


	old = v9inode->fscache;



	spin_lock(&v9inode->fscache_lock);

	mutex_lock(&v9inode->fscache_lock);

	fscache_relinquish_cookie(v9inode->fscache, 1);



	v9ses = v9fs_inode2v9ses(inode);
@@ -274,7 +274,7 @@ void v9fs_cache_inode_reset_cookie(struct inode *inode) 
	p9_debug(P9_DEBUG_FSC, "inode %p revalidating cookie old %p new %p\n",

		 inode, old, v9inode->fscache);



	spin_unlock(&v9inode->fscache_lock);

	mutex_unlock(&v9inode->fscache_lock);

}



int __v9fs_fscache_release_page(struct page *page, gfp_t gfp)

fs/9p/v9fs.h

+1 −1
Original line number Diff line number Diff line
@@ -123,7 +123,7 @@ struct v9fs_session_info { 


struct v9fs_inode {

#ifdef CONFIG_9P_FSCACHE

	spinlock_t fscache_lock;

	struct mutex fscache_lock;

	struct fscache_cookie *fscache;

#endif

	struct p9_qid qid;

fs/9p/vfs_inode.c

+1 −1
Original line number Diff line number Diff line
@@ -244,7 +244,7 @@ struct inode *v9fs_alloc_inode(struct super_block *sb) 
		return NULL;

#ifdef CONFIG_9P_FSCACHE

	v9inode->fscache = NULL;

	spin_lock_init(&v9inode->fscache_lock);

	mutex_init(&v9inode->fscache_lock);

#endif

	v9inode->writeback_fid = NULL;

	v9inode->cache_validity = 0;