[PATCH] v9fs: zero copy implementation

Performance enhancement reducing the number of copies in the data and
stat paths.

Signed-off-by: Latchesar Ionkov <lucho@ionkov.net>
Cc: Eric Van Hensbergen <ericvh@ericvh.myip.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 5 insertions, 5 deletions

diff --git a/fs/9p/vfs_super.c b/fs/9p/vfs_super.c
index 83b6edd0988a..d4d71a9ca573 100644
--- a/fs/9p/vfs_super.c
+++ b/fs/9p/vfs_super.c
@@ -44,7 +44,6 @@
 #include "v9fs.h"
 #include "9p.h"
 #include "v9fs_vfs.h"
-#include "conv.h"
 #include "fid.h"
 
 static void v9fs_clear_inode(struct inode *);
@@ -123,10 +122,11 @@ static struct super_block *v9fs_get_sb(struct file_system_type
 
         dprintk(DEBUG_VFS, " \n");
 
-        v9ses = kcalloc(1, sizeof(struct v9fs_session_info), GFP_KERNEL);
+        v9ses = kmalloc(sizeof(struct v9fs_session_info), GFP_KERNEL);
         if (!v9ses)
                 return ERR_PTR(-ENOMEM);
 
+        memset(v9ses, 0, sizeof(struct v9fs_session_info));
         if ((newfid = v9fs_session_init(v9ses, dev_name, data)) < 0) {
                 dprintk(DEBUG_ERROR, "problem initiating session\n");
                 kfree(v9ses);
@@ -168,10 +168,10 @@ static struct super_block *v9fs_get_sb(struct file_system_type
                         goto put_back_sb;
                 }
 
-                root_fid->qid = fcall->params.rstat.stat->qid;
+                root_fid->qid = fcall->params.rstat.stat.qid;
                 root->d_inode->i_ino =
-                    v9fs_qid2ino(&fcall->params.rstat.stat->qid);
-                v9fs_mistat2inode(fcall->params.rstat.stat, root->d_inode, sb);
+                    v9fs_qid2ino(&fcall->params.rstat.stat.qid);
+                v9fs_stat2inode(&fcall->params.rstat.stat, root->d_inode, sb);
         }
 
         kfree(fcall);