doc/cgroup: Fix title underline length

Commit b168ed458dde ("kernel/cgroup: Add "dmem" memory accounting
cgroup") introduced a new documentation file, with a shorter than
expected underline. This results in a documentation build warning. Fix
that underline length.

Fixes: b168ed458dde ("kernel/cgroup: Add "dmem" memory accounting cgroup")
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Closes: https://lore.kernel.org/r/20250113154611.624256bf@canb.auug.org.au/
Acked-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Simona Vetter <simona.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20250113092608.1349287-4-mripard@kernel.org
Signed-off-by: Maxime Ripard <mripard@kernel.org>

diff --git a/Documentation/core-api/cgroup.rst b/Documentation/core-api/cgroup.rst
index 8696e9513f511291ed3b6a7932528f1008a0cc3d..734ea21e1e17a318db35280200c9e8b68dac2b9e 100644 (file)
--- a/Documentation/core-api/cgroup.rst
+++ b/Documentation/core-api/cgroup.rst
@@ -3,7 +3,7 @@ Cgroup Kernel APIs
 ==================
 
 Device Memory Cgroup API (dmemcg)
-=========================
+=================================
 .. kernel-doc:: kernel/cgroup/dmem.c
    :export: