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Fix RP2040 task lock acquire ordering

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Add an acquire fence after the RP2040 recursive lock fast path because spin_try_lock_unsafe() does not provide acquire ordering when the lock is acquired immediately.

Signed-off-by: Old-Ding <ai.neo.ae86@gmail.com>
This commit is contained in:
Old-Ding 2026-06-29 23:43:01 +08:00 • committed by Anubhav Rawal
parent 78069a79ea
commit de106e32b5
1 changed files with 5 additions and 0 deletions
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5
portable/ThirdParty/GCC/RP2040/include/portmacro.h vendored
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@ -237,6 +237,11 @@ static inline void vPortRecursiveLock( BaseType_t xCoreID,
} }
spin_lock_unsafe_blocking(pxSpinLock); spin_lock_unsafe_blocking(pxSpinLock);
} }
else
{
/* spin_try_lock_unsafe() does not provide acquire ordering on the fast path. */
__mem_fence_acquire();
}
configASSERT( ucRecursionCountByLock[ ulLockNum ] == 0 ); configASSERT( ucRecursionCountByLock[ ulLockNum ] == 0 );
ucRecursionCountByLock[ ulLockNum ] = 1; ucRecursionCountByLock[ ulLockNum ] = 1;
ucOwnedByCore[ xCoreID ][ ulLockNum ] = 1; ucOwnedByCore[ xCoreID ][ ulLockNum ] = 1;