diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2021-08-12 17:43:26 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2021-08-13 10:07:44 +0200 |
| commit | 4bedcc28469a24fe481a8a31b3584e6070457ddb (patch) | |
| tree | 49478e181b9bfea9d7b06bc856482c67d9da3b82 /lib/debugobjects.c | |
| parent | Linux 5.14-rc5 (diff) | |
| download | linux-4bedcc28469a24fe481a8a31b3584e6070457ddb.tar.xz linux-4bedcc28469a24fe481a8a31b3584e6070457ddb.zip | |
debugobjects: Make them PREEMPT_RT aware
On PREEMPT_RT enabled kernels it is not possible to refill the object pool
from atomic context (preemption or interrupts disabled) as the allocator
might acquire 'sleeping' spinlocks.
Guard the invocation of fill_pool() accordingly.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Link: https://lore.kernel.org/r/87sfzehdnl.ffs@tglx
Diffstat (limited to 'lib/debugobjects.c')
| -rw-r--r-- | lib/debugobjects.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/lib/debugobjects.c b/lib/debugobjects.c index 9e14ae02306b..6946f8e204e3 100644 --- a/lib/debugobjects.c +++ b/lib/debugobjects.c @@ -557,7 +557,12 @@ __debug_object_init(void *addr, const struct debug_obj_descr *descr, int onstack struct debug_obj *obj; unsigned long flags; - fill_pool(); + /* + * On RT enabled kernels the pool refill must happen in preemptible + * context: + */ + if (!IS_ENABLED(CONFIG_PREEMPT_RT) || preemptible()) + fill_pool(); db = get_bucket((unsigned long) addr); |