ramoops: Move to fs/pstore/ram.c

Since ramoops was converted to pstore, it has nothing to do with character
devices nowadays. Instead, today it is just a RAM backend for pstore.

The patch just moves things around. There are a few changes were needed
because of the move:

1. Kconfig and Makefiles fixups, of course.

2. In pstore/ram.c we have to play a bit with MODULE_PARAM_PREFIX, this
   is needed to keep user experience the same as with ramoops driver
   (i.e. so that ramoops.foo kernel command line arguments would still
   work).

Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
Acked-by: Marco Stornelli <marco.stornelli@gmail.com>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 14 insertions, 0 deletions

diff --git a/fs/pstore/Kconfig b/fs/pstore/Kconfig
index 8007ae7c0d8c..b75ee51b2714 100644
--- a/fs/pstore/Kconfig
+++ b/fs/pstore/Kconfig
@@ -11,3 +11,17 @@ config PSTORE
            (e.g. ACPI_APEI on X86) which will select this for you.
            If you don't have a platform persistent store driver,
            say N.
+
+config PSTORE_RAM
+        tristate "Log panic/oops to a RAM buffer"
+        depends on HAS_IOMEM
+        depends on PSTORE
+        default n
+        help
+          This enables panic and oops messages to be logged to a circular
+          buffer in RAM where it can be read back at some later point.
+
+          Note that for historical reasons, the module will be named
+          "ramoops.ko".
+
+          For more information, see Documentation/ramoops.txt.