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https://github.com/torvalds/linux
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1e8e4a7cc2
Lockdep and KMSAN used to play badly together, causing deadlocks when KMSAN instrumentation of lockdep.c called lockdep functions recursively. Looks like this is no more the case, and a kernel can run (yet slower) with both KMSAN and lockdep enabled. This patch should fix false positives on wq_head->lock->dep_map, which KMSAN used to consider uninitialized because of lockdep.c not being instrumented. Link: https://lore.kernel.org/lkml/Y3b9AAEKp2Vr3e6O@sol.localdomain/ Link: https://lkml.kernel.org/r/20221128094541.2645890-1-glider@google.com Signed-off-by: Alexander Potapenko <glider@google.com> Reported-by: Eric Biggers <ebiggers@kernel.org> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Marco Elver <elver@google.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Will Deacon <will@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
35 lines
1.2 KiB
Makefile
35 lines
1.2 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
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# Any varying coverage in these files is non-deterministic
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# and is generally not a function of system call inputs.
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KCOV_INSTRUMENT := n
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obj-y += mutex.o semaphore.o rwsem.o percpu-rwsem.o
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# Avoid recursion lockdep -> sanitizer -> ... -> lockdep.
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KCSAN_SANITIZE_lockdep.o := n
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ifdef CONFIG_FUNCTION_TRACER
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CFLAGS_REMOVE_lockdep.o = $(CC_FLAGS_FTRACE)
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CFLAGS_REMOVE_lockdep_proc.o = $(CC_FLAGS_FTRACE)
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CFLAGS_REMOVE_mutex-debug.o = $(CC_FLAGS_FTRACE)
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endif
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obj-$(CONFIG_DEBUG_IRQFLAGS) += irqflag-debug.o
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obj-$(CONFIG_DEBUG_MUTEXES) += mutex-debug.o
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obj-$(CONFIG_LOCKDEP) += lockdep.o
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ifeq ($(CONFIG_PROC_FS),y)
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obj-$(CONFIG_LOCKDEP) += lockdep_proc.o
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endif
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obj-$(CONFIG_SMP) += spinlock.o
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obj-$(CONFIG_LOCK_SPIN_ON_OWNER) += osq_lock.o
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obj-$(CONFIG_PROVE_LOCKING) += spinlock.o
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obj-$(CONFIG_QUEUED_SPINLOCKS) += qspinlock.o
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obj-$(CONFIG_RT_MUTEXES) += rtmutex_api.o
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obj-$(CONFIG_PREEMPT_RT) += spinlock_rt.o ww_rt_mutex.o
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obj-$(CONFIG_DEBUG_SPINLOCK) += spinlock.o
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obj-$(CONFIG_DEBUG_SPINLOCK) += spinlock_debug.o
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obj-$(CONFIG_QUEUED_RWLOCKS) += qrwlock.o
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obj-$(CONFIG_LOCK_TORTURE_TEST) += locktorture.o
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obj-$(CONFIG_WW_MUTEX_SELFTEST) += test-ww_mutex.o
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obj-$(CONFIG_LOCK_EVENT_COUNTS) += lock_events.o
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