tjh.dev / kernel
Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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lockdep/selftests: Fix selftests vs PROVE_RAW_LOCK_NESTING

When PROVE_RAW_LOCK_NESTING=y many of the selftests FAILED because
HARDIRQ context is out-of-bounds for spinlocks. Instead make the
default hardware context the threaded hardirq context, which preserves
the old locking rules.

The wait-type specific locking selftests will have a non-threaded
HARDIRQ variant.

Fixes: de8f5e4f2dc1 ("lockdep: Introduce wait-type checks")
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Joerg Roedel <jroedel@suse.de>
Link: https://lore.kernel.org/r/20210617190313.322096283@infradead.org

Peter Zijlstra c0c2c0da f8b298cc

+1
+1
lib/locking-selftest.c
··· 195 195 #define HARDIRQ_ENTER() \ 196 196 local_irq_disable(); \ 197 197 __irq_enter(); \ 198 + lockdep_hardirq_threaded(); \ 198 199 WARN_ON(!in_irq()); 199 200 200 201 #define HARDIRQ_EXIT() \