diff options
| author | David Carlier <devnexen@gmail.com> | 2026-02-26 12:45:17 +0000 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2026-02-26 12:03:24 -1000 |
| commit | 749989b2d90ddc7dd253ad3b11a77cf882721acf (patch) | |
| tree | 75393967e79aea7e7e740ad4dc7acdc6f1a33be3 /kernel | |
| parent | 2a064262eb378263792cf1fb044de631ac41bcc5 (diff) | |
sched_ext: Fix SCX_EFLAG_INITIALIZED being a no-op flag
SCX_EFLAG_INITIALIZED is the sole member of enum scx_exit_flags with no
explicit value, so the compiler assigns it 0. This makes the bitwise OR
in scx_ops_init() a no-op:
sch->exit_info->flags |= SCX_EFLAG_INITIALIZED; /* |= 0 */
As a result, BPF schedulers cannot distinguish whether ops.init()
completed successfully by inspecting exit_info->flags.
Assign the value 1LLU << 0 so the flag is actually set.
Fixes: f3aec2adce8d ("sched_ext: Add SCX_EFLAG_INITIALIZED to indicate successful ops.init()")
Signed-off-by: David Carlier <devnexen@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/sched/ext_internal.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/sched/ext_internal.h b/kernel/sched/ext_internal.h index 386c677e4c9a..11ebb744d893 100644 --- a/kernel/sched/ext_internal.h +++ b/kernel/sched/ext_internal.h @@ -74,7 +74,7 @@ enum scx_exit_flags { * info communication. The following flag indicates whether ops.init() * finished successfully. */ - SCX_EFLAG_INITIALIZED, + SCX_EFLAG_INITIALIZED = 1LLU << 0, }; /* |