The patch titled Subject: fs/pipe.c: add ->statfs callback for pipefs has been removed from the -mm tree. Its filename was fs-pipec-add-statfs-callback-for-pipefs.patch This patch was dropped because it was merged into mainline or a subsystem tree The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/ ------------------------------------------------------ From: Pavel Emelyanov <xemul@xxxxxxxxxxxxx> Subject: fs/pipe.c: add ->statfs callback for pipefs Currently a statfs on a pipe's /proc/<pid>/fd/ link returns -ENOSYS. Wire pipfs up so that the statfs succeeds. This is required by checkpoint-restart in the userspace to make it possible to distinguish pipes from fifos. When we dump information about task's open files we use the /proc/pid/fd directoy's symlinks and the fact that opening any of them gives us exactly the same dentry->inode pair as the original process has. Now if a task we're dumping has opened pipe and fifo we need to detect this and act accordingly. Knowing that an fd with type S_ISFIFO resides on a pipefs is the most precise way. Signed-off-by: Pavel Emelyanov <xemul@xxxxxxxxxxxxx> Reviewed-by: Tejun Heo <tj@xxxxxxxxxx> Acked-by: Serge Hallyn <serge.hallyn@xxxxxxxxxxxxx> Signed-off-by: Cyrill Gorcunov <gorcunov@xxxxxxxxxx> Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- fs/pipe.c | 1 + 1 file changed, 1 insertion(+) diff -puN fs/pipe.c~fs-pipec-add-statfs-callback-for-pipefs fs/pipe.c --- a/fs/pipe.c~fs-pipec-add-statfs-callback-for-pipefs +++ a/fs/pipe.c @@ -1254,6 +1254,7 @@ out: static const struct super_operations pipefs_ops = { .destroy_inode = free_inode_nonrcu, + .statfs = simple_statfs, }; /* _ Patches currently in -mm which might be from xemul@xxxxxxxxxxxxx are origin.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html