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authorMark Rutland2021-11-29 13:06:44 +0000
committerThomas Gleixner2021-12-01 00:06:43 +0100
commit6ce895128b3bff738fe8d9dd74747a03e319e466 (patch)
treed8585eb931fe75bba40f3cbaf0edc85ab40edd7e /arch
parentdca99fb643a2e9bc2e67a0f626b09d4f177f0f09 (diff)
entry: Snapshot thread flags
Some thread flags can be set remotely, and so even when IRQs are disabled, the flags can change under our feet. Generally this is unlikely to cause a problem in practice, but it is somewhat unsound, and KCSAN will legitimately warn that there is a data race. To avoid such issues, a snapshot of the flags has to be taken prior to using them. Some places already use READ_ONCE() for that, others do not. Convert them all to the new flag accessor helpers. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Paul E. McKenney <paulmck@kernel.org> Link: https://lore.kernel.org/r/20211129130653.2037928-3-mark.rutland@arm.com
Diffstat (limited to 'arch')
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