From: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
[ Upstream commit 27af31e44949fa85550176520ef7086a0d00fd7b ]
When is_migration_base() is unused, it prevents kernel builds
with clang, `make W=1` and CONFIG_WERROR=y:
kernel/time/hrtimer.c:156:20: error: unused function 'is_migration_base' [-Werror,-Wunused-function]
156 | static inline bool is_migration_base(struct hrtimer_clock_base *base)
| ^~~~~~~~~~~~~~~~~
Fix this by marking it with __always_inline.
[ tglx: Use __always_inline instead of __maybe_unused and move it into the
usage sites conditional ]
Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/all/20250116160745.243358-1-andriy.shevchenko@xxxxxxxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
kernel/time/hrtimer.c | 22 ++++++++++++----------
1 file changed, 12 insertions(+), 10 deletions(-)
diff --git a/kernel/time/hrtimer.c b/kernel/time/hrtimer.c
index e99b1305e1a5f..d5d1b745506a9 100644
--- a/kernel/time/hrtimer.c
+++ b/kernel/time/hrtimer.c
@@ -145,11 +145,6 @@ static struct hrtimer_cpu_base migration_cpu_base = {
#define migration_base migration_cpu_base.clock_base[0]
-static inline bool is_migration_base(struct hrtimer_clock_base *base)
-{
- return base == &migration_base;
-}
-
/*
* We are using hashed locking: holding per_cpu(hrtimer_bases)[n].lock
* means that all timers which are tied to this base via timer->base are
@@ -275,11 +270,6 @@ switch_hrtimer_base(struct hrtimer *timer, struct hrtimer_clock_base *base,
#else /* CONFIG_SMP */
-static inline bool is_migration_base(struct hrtimer_clock_base *base)
-{
- return false;
-}
-
static inline struct hrtimer_clock_base *
lock_hrtimer_base(const struct hrtimer *timer, unsigned long *flags)
__acquires(&timer->base->cpu_base->lock)
@@ -1381,6 +1371,18 @@ static void hrtimer_sync_wait_running(struct hrtimer_cpu_base *cpu_base,
}
}
+#ifdef CONFIG_SMP
+static __always_inline bool is_migration_base(struct hrtimer_clock_base *base)
+{
+ return base == &migration_base;
+}
+#else
+static __always_inline bool is_migration_base(struct hrtimer_clock_base *base)
+{
+ return false;
+}
+#endif
+
/*
* This function is called on PREEMPT_RT kernels when the fast path
* deletion of a timer failed because the timer callback function was
--
2.39.5
