tjh.dev / kernel
Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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debugobjects: Use LD_WAIT_CONFIG instead of LD_WAIT_SLEEP

fill_pool_map is used to suppress nesting violations caused by acquiring
a spinlock_t (from within the memory allocator) while holding a
raw_spinlock_t. The used annotation is wrong.

LD_WAIT_SLEEP is for always sleeping lock types such as mutex_t.
LD_WAIT_CONFIG is for lock type which are sleeping while spinning on
PREEMPT_RT such as spinlock_t.

Use LD_WAIT_CONFIG as override.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://patch.msgid.link/20251127153652.291697-3-bigeasy@linutronix.de

authored by

Sebastian Andrzej Siewior and committed by
Thomas Gleixner 37de2dbc 06e0ae98

+2 -2
+2 -2
lib/debugobjects.c
··· 717 717 if (!IS_ENABLED(CONFIG_PREEMPT_RT) || preemptible() || system_state < SYSTEM_SCHEDULING) { 718 718 /* 719 719 * Annotate away the spinlock_t inside raw_spinlock_t warning 720 - * by temporarily raising the wait-type to WAIT_SLEEP, matching 720 + * by temporarily raising the wait-type to LD_WAIT_CONFIG, matching 721 721 * the preemptible() condition above. 722 722 */ 723 - static DEFINE_WAIT_OVERRIDE_MAP(fill_pool_map, LD_WAIT_SLEEP); 723 + static DEFINE_WAIT_OVERRIDE_MAP(fill_pool_map, LD_WAIT_CONFIG); 724 724 lock_map_acquire_try(&fill_pool_map); 725 725 fill_pool(); 726 726 lock_map_release(&fill_pool_map);