NFS: Remove BKL from the symlink code

Page cache accesses are serialised using page locks, whereas attribute
updates are serialised using inode->i_lock.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index 1bdc36b..e5f9502 100644 (file)
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -1482,13 +1482,9 @@ static int nfs_symlink(struct inode *dir, struct dentry *dentry, const char *sym
        attr.ia_mode = S_IFLNK | S_IRWXUGO;
        attr.ia_valid = ATTR_MODE;
 
-       lock_kernel();
-
        page = alloc_page(GFP_HIGHUSER);
-       if (!page) {
-               unlock_kernel();
+       if (!page)
                return -ENOMEM;
-       }
 
        kaddr = kmap_atomic(page, KM_USER0);
        memcpy(kaddr, symname, pathlen);
@@ -1503,7 +1499,6 @@ static int nfs_symlink(struct inode *dir, struct dentry *dentry, const char *sym
                        dentry->d_name.name, symname, error);
                d_drop(dentry);
                __free_page(page);
-               unlock_kernel();
                return error;
        }
 
@@ -1521,7 +1516,6 @@ static int nfs_symlink(struct inode *dir, struct dentry *dentry, const char *sym
        } else
                __free_page(page);
 
-       unlock_kernel();
        return 0;
 }