[PATCH v2 5/8] docs: document stop-a in sysctl/kernel.rst

[Stephen Kitt]

This describes the SPARC-specific stop-a sysctl entry, which was
previously listed in kernel.rst but not documented.

Base on the implementation in arch/sparc/kernel/setup_{32,64}.c and
kernel/panic.c.

Signed-off-by: Stephen Kitt <steve@xxxxxxx>
---
 Documentation/admin-guide/sysctl/kernel.rst | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/Documentation/admin-guide/sysctl/kernel.rst b/Documentation/admin-guide/sysctl/kernel.rst
index 76ff10f6f63a..795d8e695f50 100644
--- a/Documentation/admin-guide/sysctl/kernel.rst
+++ b/Documentation/admin-guide/sysctl/kernel.rst
@@ -1068,6 +1068,16 @@ compilation sees a 1% slowdown, other systems and workloads may vary.
 stop-a (SPARC only)
 ===================
 
+Controls Stop-A:
+
+= ====================================
+0 Stop-A has no effect.
+1 Stop-A breaks to the PROM (default).
+= ====================================
+
+Stop-A is always enabled on a panic, so that the user can return to
+the boot PROM.
+
 
 sysrq
 =====
-- 
2.20.1