On Thu, Jun 25, 2020 at 09:12:32PM -0700, Paul E. McKenney wrote: > Hello! > > This pull request contains a single commit that uses "arch_" atomic > operations to avoid the instrumentation that comes with the non-"arch_" > versions. In preparation for that commit, it also has another commit > that makes these "arch_" atomic operations available to generic code. > > Without these commits, KCSAN uses can see pointless errors. > > This pull request is currently RFC pending ongoing -next testing. And it has now cleared a round of -next testing! ;-) Thanx, Paul > This was not entirely free of drama, with Stephen needing to handle > a merge conflict: > > https://lore.kernel.org/lkml/20200626131425.73ee4e27@xxxxxxxxxxxxxxxx/ > > However, the resolution looks straightforward to me. In addition, > these two commits pass rcutorture testing and associated KCSAN testing. > > The following changes since commit b3a9e3b9622ae10064826dccb4f7a52bd88c7407: > > Linux 5.8-rc1 (2020-06-14 12:45:04 -0700) > > are available in the git repository at: > > git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git rcu/urgent > > for you to fetch changes up to b58e733fd774f3f4b49d9e7640d172a57e35200e: > > rcu: Fixup noinstr warnings (2020-06-25 08:24:32 -0700) > > ---------------------------------------------------------------- > Peter Zijlstra (2): > locking/atomics: Provide the arch_atomic_ interface to generic code > rcu: Fixup noinstr warnings > > include/linux/atomic-fallback.h | 236 +++++++++++++++++++++++++++++++++- > include/linux/compiler.h | 2 +- > kernel/rcu/tree.c | 32 ++++- > scripts/atomic/gen-atomic-fallback.sh | 31 +++++ > 4 files changed, 292 insertions(+), 9 deletions(-)
