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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: Sasha Levin <sasha.levin@oracle.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Sasha Levin 2016-01-07 17:49:51 -05:00 committed by Al Viro
parent 3cc4a84e02
commit 8f5fed1e91
3 changed files with 6 additions and 6 deletions
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8
fs/9p/cache.c
View File

@ -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)

2
fs/9p/v9fs.h
View File

@ -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;

2
fs/9p/vfs_inode.c
View File

@ -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;