[PATCH] TIOCSTI: Document CAP_SYS_ADMIN behaviour in Kconfig

[Günther Noack]

Clarifies that the LEGACY_TIOCSTI setting is safe to turn off even
when running BRLTTY, as it was introduced in commit 690c8b804ad2
("TIOCSTI: always enable for CAP_SYS_ADMIN").

Signed-off-by: Günther Noack <gnoack3000@xxxxxxxxx>
---
 drivers/tty/Kconfig | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/tty/Kconfig b/drivers/tty/Kconfig
index 341abaed4ce..069de553127 100644
--- a/drivers/tty/Kconfig
+++ b/drivers/tty/Kconfig
@@ -164,6 +164,9 @@ config LEGACY_TIOCSTI
 	  userspace depends on this functionality to continue operating
 	  normally.
 
+	  Processes which run with CAP_SYS_ADMIN, such as BRLTTY, can
+	  use TIOCSTI even when this is set to N.
+
 	  This functionality can be changed at runtime with the
 	  dev.tty.legacy_tiocsti sysctl. This configuration option sets
 	  the default value of the sysctl.
-- 
2.41.0