Pull ia64-mutex-primitives into release branch

[linux-2.6-omap-h63xx.git] / fs / fuse / fuse_i.h

diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h
index 7ed1d3c53b8acc49b8a62e9475fa344370d53bc2..4a83adfec968ebae108b9ae71802e14db6ef6dbb 100644 (file)
--- a/fs/fuse/fuse_i.h
+++ b/fs/fuse/fuse_i.h
@@ -94,6 +94,11 @@ struct fuse_out {
        /** Header returned from userspace */
        struct fuse_out_header h;
 
+       /*
+        * The following bitfields are not changed during the request
+        * processing
+        */
+
        /** Last argument is variable length (can be shorter than
            arg->size) */
        unsigned argvar:1;
@@ -136,6 +141,12 @@ struct fuse_req {
        /** refcount */
        atomic_t count;
 
+       /*
+        * The following bitfields are either set once before the
+        * request is queued or setting/clearing them is protected by
+        * fuse_lock
+        */
+
        /** True if the request has reply */
        unsigned isreply:1;
 
@@ -250,15 +261,25 @@ struct fuse_conn {
        u64 reqctr;
 
        /** Mount is active */
-       unsigned mounted : 1;
+       unsigned mounted;
 
        /** Connection established, cleared on umount, connection
            abort and device release */
-       unsigned connected : 1;
+       unsigned connected;
 
-       /** Connection failed (version mismatch) */
+       /** Connection failed (version mismatch).  Cannot race with
+           setting other bitfields since it is only set once in INIT
+           reply, before any other request, and never cleared */
        unsigned conn_error : 1;
 
+       /** Do readpages asynchronously?  Only set in INIT */
+       unsigned async_read : 1;
+
+       /*
+        * The following bitfields are only for optimization purposes
+        * and hence races in setting them will not cause malfunction
+        */
+
        /** Is fsync not implemented by fs? */
        unsigned no_fsync : 1;