Merge tag 'pstore-v4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux

Pull pstore fixes from Kees Cook:
 "Fixes for pstore ramoops driver to catch bad kfree() and to use better
  DT bindings"

* tag 'pstore-v4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
  ramoops: use persistent_ram_free() instead of kfree() for freeing prz
  ramoops: use DT reserved-memory bindings

2 files changed, 31 insertions, 15 deletions

diff --git a/Documentation/devicetree/bindings/misc/ramoops.txt b/Documentation/devicetree/bindings/reserved-memory/ramoops.txt
index cd02cec67d38..e81f821a2135 100644
--- a/Documentation/devicetree/bindings/misc/ramoops.txt
+++ b/Documentation/devicetree/bindings/reserved-memory/ramoops.txt
@@ -2,8 +2,9 @@ Ramoops oops/panic logger
 =========================
 
 ramoops provides persistent RAM storage for oops and panics, so they can be
-recovered after a reboot. It is a backend to pstore, so this node is named
-"ramoops" after the backend, rather than "pstore" which is the subsystem.
+recovered after a reboot. This is a child-node of "/reserved-memory", and
+is named "ramoops" after the backend, rather than "pstore" which is the
+subsystem.
 
 Parts of this storage may be set aside for other persistent log buffers, such
 as kernel log messages, or for optional ECC error-correction data.  The total
@@ -21,8 +22,7 @@ Required properties:
 
 - compatible: must be "ramoops"
 
-- memory-region: phandle to a region of memory that is preserved between
-  reboots
+- reg: region of memory that is preserved between reboots
 
 
 Optional properties:
diff --git a/Documentation/ramoops.txt b/Documentation/ramoops.txt
index 9264bcab4099..26b9f31cf65a 100644
--- a/Documentation/ramoops.txt
+++ b/Documentation/ramoops.txt
@@ -45,18 +45,34 @@ corrupt, but usually it is restorable.
 
 2. Setting the parameters
 
-Setting the ramoops parameters can be done in 3 different manners:
- 1. Use the module parameters (which have the names of the variables described
- as before).
- For quick debugging, you can also reserve parts of memory during boot
- and then use the reserved memory for ramoops. For example, assuming a machine
- with > 128 MB of memory, the following kernel command line will tell the
- kernel to use only the first 128 MB of memory, and place ECC-protected ramoops
- region at 128 MB boundary:
+Setting the ramoops parameters can be done in several different manners:
+
+ A. Use the module parameters (which have the names of the variables described
+ as before). For quick debugging, you can also reserve parts of memory during
+ boot and then use the reserved memory for ramoops. For example, assuming a
+ machine with > 128 MB of memory, the following kernel command line will tell
+ the kernel to use only the first 128 MB of memory, and place ECC-protected
+ ramoops region at 128 MB boundary:
  "mem=128M ramoops.mem_address=0x8000000 ramoops.ecc=1"
- 2. Use Device Tree bindings, as described in
- Documentation/device-tree/bindings/misc/ramoops.txt.
- 3. Use a platform device and set the platform data. The parameters can then
+
+ B. Use Device Tree bindings, as described in
+ Documentation/device-tree/bindings/reserved-memory/ramoops.txt.
+ For example:
+
+        reserved-memory {
+                #address-cells = <2>;
+                #size-cells = <2>;
+                ranges;
+
+                ramoops@8f000000 {
+                        compatible = "ramoops";
+                        reg = <0 0x8f000000 0 0x100000>;
+                        record-size = <0x4000>;
+                        console-size = <0x4000>;
+                };
+        };
+
+ C. Use a platform device and set the platform data. The parameters can then
  be set through that platform data. An example of doing that is:
 
 #include <linux/pstore_ram.h>