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author | Marco Elver <elver@google.com> | 2021-11-30 12:44:23 +0100 |
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committer | Paul E. McKenney <paulmck@kernel.org> | 2021-12-09 16:42:27 -0800 |
commit | 2505a51ac6f249956735e0a369e2404f96eebef0 (patch) | |
tree | edaea77c1a0eb71bd8e157b369c8f927e682f6ad /scripts | |
parent | f948666de517cf8ebef7cb2c9b2d669dec4bfe2e (diff) | |
download | linux-2505a51ac6f249956735e0a369e2404f96eebef0.tar.bz2 |
locking/barriers, kcsan: Support generic instrumentation
Thus far only smp_*() barriers had been defined by asm-generic/barrier.h
based on __smp_*() barriers, because the !SMP case is usually generic.
With the introduction of instrumentation, it also makes sense to have
asm-generic/barrier.h assist in the definition of instrumented versions
of mb(), rmb(), wmb(), dma_rmb(), and dma_wmb().
Because there is no requirement to distinguish the !SMP case, the
definition can be simpler: we can avoid also providing fallbacks for the
__ prefixed cases, and only check if `defined(__<barrier>)`, to finally
define the KCSAN-instrumented versions.
This also allows for the compiler to complain if an architecture
accidentally defines both the normal and __ prefixed variant.
Signed-off-by: Marco Elver <elver@google.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'scripts')
0 files changed, 0 insertions, 0 deletions