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| author | Peter Zijlstra <peterz@infradead.org> | 2020-06-25 15:55:14 +0200 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2020-06-25 08:23:22 -0700 |
| commit | 5faafd5685764e4d75376aceac91fdf75b3b16f8 (patch) | |
| tree | ae6587b97347227d2c2b7e50b9a5f049e2b70fbd /scripts/atomic | |
| parent | b3a9e3b9622ae10064826dccb4f7a52bd88c7407 (diff) | |
| download | lwn-5faafd5685764e4d75376aceac91fdf75b3b16f8.tar.gz lwn-5faafd5685764e4d75376aceac91fdf75b3b16f8.zip | |
locking/atomics: Provide the arch_atomic_ interface to generic code
Architectures with instrumented (KASAN/KCSAN) atomic operations
natively provide arch_atomic_ variants that are not instrumented.
It turns out that some generic code also requires arch_atomic_ in
order to avoid instrumentation, so provide the arch_atomic_ interface
as a direct map into the regular atomic_ interface for
non-instrumented architectures.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'scripts/atomic')
| -rwxr-xr-x | scripts/atomic/gen-atomic-fallback.sh | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/scripts/atomic/gen-atomic-fallback.sh b/scripts/atomic/gen-atomic-fallback.sh index 0fd1cf0c2b94..693dfa1de430 100755 --- a/scripts/atomic/gen-atomic-fallback.sh +++ b/scripts/atomic/gen-atomic-fallback.sh @@ -58,6 +58,21 @@ cat << EOF EOF } +gen_proto_order_variant() +{ + local meta="$1"; shift + local pfx="$1"; shift + local name="$1"; shift + local sfx="$1"; shift + local order="$1"; shift + local arch="$1" + local atomic="$2" + + local basename="${arch}${atomic}_${pfx}${name}${sfx}" + + printf "#define arch_${basename}${order} ${basename}${order}\n" +} + #gen_proto_order_variants(meta, pfx, name, sfx, arch, atomic, int, args...) gen_proto_order_variants() { @@ -72,6 +87,22 @@ gen_proto_order_variants() local template="$(find_fallback_template "${pfx}" "${name}" "${sfx}" "${order}")" + if [ -z "$arch" ]; then + gen_proto_order_variant "${meta}" "${pfx}" "${name}" "${sfx}" "" "$@" + + if meta_has_acquire "${meta}"; then + gen_proto_order_variant "${meta}" "${pfx}" "${name}" "${sfx}" "_acquire" "$@" + fi + if meta_has_release "${meta}"; then + gen_proto_order_variant "${meta}" "${pfx}" "${name}" "${sfx}" "_release" "$@" + fi + if meta_has_relaxed "${meta}"; then + gen_proto_order_variant "${meta}" "${pfx}" "${name}" "${sfx}" "_relaxed" "$@" + fi + + echo "" + fi + # If we don't have relaxed atomics, then we don't bother with ordering fallbacks # read_acquire and set_release need to be templated, though if ! meta_has_relaxed "${meta}"; then |