[PATCH 3/3] Docs/admin-guide/mm/damon/usage: Fix incorrect option syntax in perf example

[Adrian Huang (Lenovo)]

The kill command in the DAMON documentation uses an incorrect
option syntax in the perf example.

Use kill -9 instead of kill 9 to correctly send SIGKILL to
the perf process.

Signed-off-by: Adrian Huang (Lenovo) <adrianhuang0701@xxxxxxxxx>
---
 Documentation/admin-guide/mm/damon/usage.rst | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Documentation/admin-guide/mm/damon/usage.rst b/Documentation/admin-guide/mm/damon/usage.rst
index 3d43954c7046..bd687d89ea4c 100644
--- a/Documentation/admin-guide/mm/damon/usage.rst
+++ b/Documentation/admin-guide/mm/damon/usage.rst
@@ -749,7 +749,7 @@ show results using tracepoint supporting tools like ``perf``.  For example::
     # echo on > kdamonds/0/state
     # perf record -e damon:damon_aggregated &
     # sleep 5
-    # kill 9 $(pidof perf)
+    # kill -9 $(pidof perf)
     # echo off > kdamonds/0/state
     # perf script
     kdamond.0 46568 [027] 79357.842179: damon:damon_aggregated: target_id=0 nr_regions=11 122509119488-135708762112: 0 864
-- 
2.43.0