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| author | Shengming Hu <hu.shengming@zte.com.cn> | 2026-02-13 14:29:32 +0800 |
|---|---|---|
| committer | Sasha Levin <sashal@kernel.org> | 2026-03-04 07:21:30 -0500 |
| commit | f8d02862e520baea496f9277aefbcadf95a25c8f (patch) | |
| tree | c1a3adab2f6bcb402282a480c9905c494a45caba /include/net/aligned_data.h | |
| parent | e4ff4e3ffcf9d5aad380cdd1d8cdc008bb34f97d (diff) | |
function_graph: Restore direct mode when callbacks drop to one
[ Upstream commit 53b2fae90ff01fede6520ca744ed5e8e366497ba ]
When registering a second fgraph callback, direct path is disabled and
array loop is used instead. When ftrace_graph_active falls back to one,
we try to re-enable direct mode via ftrace_graph_enable_direct(true, ...).
But ftrace_graph_enable_direct() incorrectly disables the static key
rather than enabling it. This leaves fgraph_do_direct permanently off
after first multi-callback transition, so direct fast mode is never
restored.
Cc: stable@vger.kernel.org
Link: https://patch.msgid.link/20260213142932519cuWSpEXeS4-UnCvNXnK2P@zte.com.cn
Fixes: cc60ee813b503 ("function_graph: Use static_call and branch to optimize entry function")
Signed-off-by: Shengming Hu <hu.shengming@zte.com.cn>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'include/net/aligned_data.h')
0 files changed, 0 insertions, 0 deletions