3 files changed, 17 insertions, 0 deletions
diff --git a/Documentation/filesystems/porting.rst b/Documentation/filesystems/porting.rst
index 633610253f45..0302035781be 100644
--- a/Documentation/filesystems/porting.rst
+++ b/Documentation/filesystems/porting.rst
@@ -883,3 +883,10 @@ For bvec based itererators bio_iov_iter_get_pages() now doesn't copy bvecs but
 uses the one provided. Anyone issuing kiocb-I/O should ensure that the bvec and
 page references stay until I/O has completed, i.e. until ->ki_complete() has
 been called or returned with non -EIOCBQUEUED code.
+
+---
+
+**mandatory**
+
+mnt_want_write_file() can now only be paired with mnt_drop_write_file(),
+whereas previously it could be paired with mnt_drop_write() as well.
diff --git a/Documentation/filesystems/proc.rst b/Documentation/filesystems/proc.rst
index 9abdba17565e..48fbfc336ebf 100644
--- a/Documentation/filesystems/proc.rst
+++ b/Documentation/filesystems/proc.rst
@@ -691,6 +691,10 @@ files are there, and which are missing.
                 number of processes currently runnable (running or on ready queue);
                 total number of processes in system;
                 last pid created.
+                All fields are separated by one space except "number of
+                processes currently runnable" and "total number of processes
+                in system", which are separated by a slash ('/'). Example:
+                0.61 0.61 0.55 3/828 22084
  locks        Kernel locks
  meminfo      Memory info
  misc         Miscellaneous
diff --git a/Documentation/filesystems/seq_file.rst b/Documentation/filesystems/seq_file.rst
index 56856481dc8d..a6726082a7c2 100644
--- a/Documentation/filesystems/seq_file.rst
+++ b/Documentation/filesystems/seq_file.rst
@@ -217,6 +217,12 @@ between the calls to start() and stop(), so holding a lock during that time
 is a reasonable thing to do. The seq_file code will also avoid taking any
 other locks while the iterator is active.
 
+The iterater value returned by start() or next() is guaranteed to be
+passed to a subsequent next() or stop() call.  This allows resources
+such as locks that were taken to be reliably released.  There is *no*
+guarantee that the iterator will be passed to show(), though in practice
+it often will be.
+
 
 Formatted output
 ================