RAS: Add a menuconfig option with descriptive text

Text taken a previous patch from "Gong Chen" <gong.chen@linux.intel.com>.

Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Gong Chen <gong.chen@linux.intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Link: http://lkml.kernel.org/r/1439396985-12812-11-git-send-email-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>

diff --git a/drivers/ras/Kconfig b/drivers/ras/Kconfig
index f9da613..e5f0a43 100644 (file)
--- a/drivers/ras/Kconfig
+++ b/drivers/ras/Kconfig
@@ -1,2 +1,32 @@
-config RAS
-       bool
+menuconfig RAS
+       bool "Reliability, Availability and Serviceability (RAS) features"
+       help
+         Reliability, availability and serviceability (RAS) is a computer
+         hardware engineering term. Computers designed with higher levels
+         of RAS have a multitude of features that protect data integrity
+         and help them stay available for long periods of time without
+         failure.
+
+         Reliability can be defined as the probability that the system will
+         produce correct outputs up to some given time. Reliability is
+         enhanced by features that help to avoid, detect and repair hardware
+         faults.
+
+         Availability is the probability a system is operational at a given
+         time, i.e. the amount of time a device is actually operating as the
+         percentage of total time it should be operating.
+
+         Serviceability or maintainability is the simplicity and speed with
+         which a system can be repaired or maintained; if the time to repair
+         a failed system increases, then availability will decrease.
+
+         Note that Reliability and Availability are distinct concepts:
+         Reliability is a measure of the ability of a system to function
+         correctly, including avoiding data corruption, whereas Availability
+         measures how often it is available for use, even though it may not
+         be functioning correctly. For example, a server may run forever and
+         so have ideal availability, but may be unreliable, with frequent
+         data corruption.
+
+if RAS
+endif