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-rw-r--r--fs/efivarfs/super.c6
-rw-r--r--kernel/sched/ext.c12
-rw-r--r--kernel/sched/ext_idle.c2
-rw-r--r--tools/testing/selftests/sched_ext/exit.c8
4 files changed, 23 insertions, 5 deletions
diff --git a/fs/efivarfs/super.c b/fs/efivarfs/super.c
index c900d98bf494..284d6dbba2ec 100644
--- a/fs/efivarfs/super.c
+++ b/fs/efivarfs/super.c
@@ -390,10 +390,16 @@ static int efivarfs_reconfigure(struct fs_context *fc)
return 0;
}
+static void efivarfs_free(struct fs_context *fc)
+{
+ kfree(fc->s_fs_info);
+}
+
static const struct fs_context_operations efivarfs_context_ops = {
.get_tree = efivarfs_get_tree,
.parse_param = efivarfs_parse_param,
.reconfigure = efivarfs_reconfigure,
+ .free = efivarfs_free,
};
static int efivarfs_check_missing(efi_char16_t *name16, efi_guid_t vendor,
diff --git a/kernel/sched/ext.c b/kernel/sched/ext.c
index b498d867ba21..7dd5cbcb7a06 100644
--- a/kernel/sched/ext.c
+++ b/kernel/sched/ext.c
@@ -1272,7 +1272,8 @@ static inline struct rq *scx_locked_rq(void)
#define SCX_CALL_OP(sch, mask, op, rq, args...) \
do { \
- update_locked_rq(rq); \
+ if (rq) \
+ update_locked_rq(rq); \
if (mask) { \
scx_kf_allow(mask); \
(sch)->ops.op(args); \
@@ -1280,14 +1281,16 @@ do { \
} else { \
(sch)->ops.op(args); \
} \
- update_locked_rq(NULL); \
+ if (rq) \
+ update_locked_rq(NULL); \
} while (0)
#define SCX_CALL_OP_RET(sch, mask, op, rq, args...) \
({ \
__typeof__((sch)->ops.op(args)) __ret; \
\
- update_locked_rq(rq); \
+ if (rq) \
+ update_locked_rq(rq); \
if (mask) { \
scx_kf_allow(mask); \
__ret = (sch)->ops.op(args); \
@@ -1295,7 +1298,8 @@ do { \
} else { \
__ret = (sch)->ops.op(args); \
} \
- update_locked_rq(NULL); \
+ if (rq) \
+ update_locked_rq(NULL); \
__ret; \
})
diff --git a/kernel/sched/ext_idle.c b/kernel/sched/ext_idle.c
index 6d29d3cbc670..001fb88a8481 100644
--- a/kernel/sched/ext_idle.c
+++ b/kernel/sched/ext_idle.c
@@ -903,7 +903,7 @@ s32 select_cpu_from_kfunc(struct task_struct *p, s32 prev_cpu, u64 wake_flags,
* selection optimizations and simply check whether the previously
* used CPU is idle and within the allowed cpumask.
*/
- if (p->nr_cpus_allowed == 1) {
+ if (p->nr_cpus_allowed == 1 || is_migration_disabled(p)) {
if (cpumask_test_cpu(prev_cpu, allowed ?: p->cpus_ptr) &&
scx_idle_test_and_clear_cpu(prev_cpu))
cpu = prev_cpu;
diff --git a/tools/testing/selftests/sched_ext/exit.c b/tools/testing/selftests/sched_ext/exit.c
index 9451782689de..ee25824b1cbe 100644
--- a/tools/testing/selftests/sched_ext/exit.c
+++ b/tools/testing/selftests/sched_ext/exit.c
@@ -22,6 +22,14 @@ static enum scx_test_status run(void *ctx)
struct bpf_link *link;
char buf[16];
+ /*
+ * On single-CPU systems, ops.select_cpu() is never
+ * invoked, so skip this test to avoid getting stuck
+ * indefinitely.
+ */
+ if (tc == EXIT_SELECT_CPU && libbpf_num_possible_cpus() == 1)
+ continue;
+
skel = exit__open();
SCX_ENUM_INIT(skel);
skel->rodata->exit_point = tc;