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authorThomas Gleixner <tglx@linutronix.de>2021-08-12 18:43:26 +0300
committerThomas Gleixner <tglx@linutronix.de>2021-08-13 11:07:44 +0300
commit4bedcc28469a24fe481a8a31b3584e6070457ddb (patch)
tree49478e181b9bfea9d7b06bc856482c67d9da3b82 /lib/debugobjects.c
parent36a21d51725af2ce0700c6ebcb6b9594aac658a6 (diff)
downloadlinux-4bedcc28469a24fe481a8a31b3584e6070457ddb.tar.xz
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.c7
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);