+// SPDX-License-Identifier: GPL-2.0
#define pr_fmt(fmt) "kcov: " fmt
#define DISABLE_BRANCH_PROFILING
void kcov_task_init(struct task_struct *t)
{
- t->kcov_mode = KCOV_MODE_DISABLED;
+ WRITE_ONCE(t->kcov_mode, KCOV_MODE_DISABLED);
+ barrier();
t->kcov_size = 0;
t->kcov_area = NULL;
t->kcov = NULL;
if (unused != 0 || kcov->mode == KCOV_MODE_DISABLED ||
kcov->area == NULL)
return -EINVAL;
- if (kcov->t != NULL)
- return -EBUSY;
t = current;
+ if (kcov->t != NULL || t->kcov != NULL)
+ return -EBUSY;
/* Cache in task struct for performance. */
t->kcov_size = kcov->size;
t->kcov_area = kcov->area;