[PATCH] Documentation/sysctl/vm.txt: Fix drop_caches bit number

[Vincent Whitchurch]

Bits are usually numbered starting from zero, so 4 should be bit 2, not
bit 3.

Suggested-by: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Signed-off-by: Vincent Whitchurch <vincent.whitchurch@xxxxxxxx>
---
 Documentation/sysctl/vm.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Documentation/sysctl/vm.txt b/Documentation/sysctl/vm.txt
index 187ce4f599a2..6af24cdb25cc 100644
--- a/Documentation/sysctl/vm.txt
+++ b/Documentation/sysctl/vm.txt
@@ -237,7 +237,7 @@ used:
 	cat (1234): drop_caches: 3
 
 These are informational only.  They do not mean that anything is wrong
-with your system.  To disable them, echo 4 (bit 3) into drop_caches.
+with your system.  To disable them, echo 4 (bit 2) into drop_caches.
 
 ==============================================================
 
-- 
2.20.0