From: Trond Myklebust <Trond.Myklebust@netapp.com>
Date: Wed, 11 Jun 2008 19:44:22 +0000 (-0400)
Subject: NFS: Remove BKL from the symlink code
X-Git-Tag: firefly_0821_release~19647^2^2~3
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=76566991f94c206d9c5881edcaf99ba72c9e9d61;p=firefly-linux-kernel-4.4.55.git

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 1bdc36bf1782..e5f950291928 100644
--- 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;
 }