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f97f713dc2
Introduces ASSERT_EXCLUSIVE_WRITER() and ASSERT_EXCLUSIVE_ACCESS(), which
may be used to assert properties of synchronization logic, where
violation cannot be detected as a normal data race.
Examples of the reports that may be generated:
==================================================================
BUG: KCSAN: assert: race in test_thread / test_thread
write to 0xffffffffab3d1540 of 8 bytes by task 466 on cpu 2:
test_thread+0x8d/0x111
debugfs_write.cold+0x32/0x44
...
assert no writes to 0xffffffffab3d1540 of 8 bytes by task 464 on cpu 0:
test_thread+0xa3/0x111
debugfs_write.cold+0x32/0x44
...
==================================================================
==================================================================
BUG: KCSAN: assert: race in test_thread / test_thread
assert no accesses to 0xffffffffab3d1540 of 8 bytes by task 465 on cpu 1:
test_thread+0xb9/0x111
debugfs_write.cold+0x32/0x44
...
read to 0xffffffffab3d1540 of 8 bytes by task 464 on cpu 0:
test_thread+0x77/0x111
debugfs_write.cold+0x32/0x44
...
==================================================================
Suggested-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Marco Elver <elver@google.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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| acpi | ||
| asm-generic | ||
| clocksource | ||
| crypto | ||
| drm | ||
| dt-bindings | ||
| keys | ||
| kunit | ||
| kvm | ||
| linux | ||
| math-emu | ||
| media | ||
| misc | ||
| net | ||
| pcmcia | ||
| ras | ||
| rdma | ||
| scsi | ||
| soc | ||
| sound | ||
| target | ||
| trace | ||
| uapi | ||
| vdso | ||
| video | ||
| xen | ||