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locking/atomic: Add generic try_cmpxchg64 support

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Add generic support for try_cmpxchg64{,_acquire,_release,_relaxed}
and their falbacks involving cmpxchg64.

Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20220515184205.103089-2-ubizjak@gmail.com
This commit is contained in:
Uros Bizjak
2022-05-15 20:42:03 +02:00
committed by Peter Zijlstra
parent 6829061315
commit 0aa7be05d8
4 changed files with 129 additions and 16 deletions
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2
scripts/atomic/gen-atomic-instrumented.sh
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@@ -166,7 +166,7 @@ grep '^[a-z]' "$1" | while read name meta args; do
done
for xchg in "xchg" "cmpxchg" "cmpxchg64" "try_cmpxchg"; do
for xchg in "xchg" "cmpxchg" "cmpxchg64" "try_cmpxchg" "try_cmpxchg64"; do
for order in "" "_acquire" "_release" "_relaxed"; do
gen_xchg "${xchg}" "${order}" ""
printf "\n"