[3.14] gh-135871: Fix needless spinning in `_PyMutex_LockTimed` with zero timeout (gh-135872) by miss-islington · Pull Request #135946 · python/cpython

…ongh-135872)

The free threading build could spin unnecessarily on `_Py_yield()` if the initial
compare and swap failed.
(cherry picked from commit cbfaf41)

Co-authored-by: Joseph Tibbertsma <josephtibbertsma@gmail.com>

bedevere-app Bot added the awaiting review label

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vstinner changed the title [3.14] Fix needless spinning in _PyMutex_LockTimed with zero timeout (gh-135872) [3.14] gh-135871: Fix needless spinning in _PyMutex_LockTimed with zero timeout (gh-135872)

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colesbury merged commit 80fc62f into python:3.14

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bedevere-app Bot removed the awaiting review label

miss-islington deleted the backport-cbfaf41-3.14 branch