diff options
| author | Maarten Lankhorst <maarten.lankhorst@linux.intel.com> | 2024-11-04 14:44:16 +0100 |
|---|---|---|
| committer | Maarten Lankhorst <maarten.lankhorst@linux.intel.com> | 2024-11-04 14:45:21 +0100 |
| commit | d78f0ee0406803cda8801fd5201746ccf89e5e4a (patch) | |
| tree | d0d145319344a07cb6f4b47578f01236b71ad473 /kernel/task_work.c | |
| parent | a88f9ed63b3cec761b04cba8104b2d0b2b66b25d (diff) | |
| parent | 30169bb64580bd7bce9290c1952bf0aa6cc37fe5 (diff) | |
Merge remote-tracking branch 'drm/drm-next' into drm-misc-next
Didn't notice drm/drm-next had the build fix for drm_bridge, so ended up
committing the same patch. Sync with drm and pretend it didn't happen?
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Diffstat (limited to 'kernel/task_work.c')
| -rw-r--r-- | kernel/task_work.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/kernel/task_work.c b/kernel/task_work.c index 5d14d639ac71..c969f1f26be5 100644 --- a/kernel/task_work.c +++ b/kernel/task_work.c @@ -55,15 +55,26 @@ int task_work_add(struct task_struct *task, struct callback_head *work, enum task_work_notify_mode notify) { struct callback_head *head; + int flags = notify & TWA_FLAGS; + notify &= ~TWA_FLAGS; if (notify == TWA_NMI_CURRENT) { if (WARN_ON_ONCE(task != current)) return -EINVAL; if (!IS_ENABLED(CONFIG_IRQ_WORK)) return -EINVAL; } else { - /* record the work call stack in order to print it in KASAN reports */ - kasan_record_aux_stack(work); + /* + * Record the work call stack in order to print it in KASAN + * reports. + * + * Note that stack allocation can fail if TWAF_NO_ALLOC flag + * is set and new page is needed to expand the stack buffer. + */ + if (flags & TWAF_NO_ALLOC) + kasan_record_aux_stack_noalloc(work); + else + kasan_record_aux_stack(work); } head = READ_ONCE(task->task_works); |