From: Alvaro Herrera <alvherre@alvh.no-ip.org>
To: pgsql-committers@lists.postgresql.org
Subject: pgsql: Remove bogus assertion in pg_atomic_monotonic_advance_u64
Date: Thu, 04 Jul 2024 11:35:19 +0000
Message-ID: <E1sPKk9-000HuW-Kj@gemulon.postgresql.org> (raw)
Remove bogus assertion in pg_atomic_monotonic_advance_u64
This code wanted to ensure that the 'exchange' variable passed to
pg_atomic_compare_exchange_u64 has correct alignment, but apparently
platforms don't actually require anything that doesn't come naturally.
While messing with pg_atomic_monotonic_advance_u64: instead of using
Max() to determine the value to return, just use
pg_atomic_compare_exchange_u64()'s return value to decide; also, use
pg_atomic_compare_exchange_u64 instead of the _impl version; also remove
the unnecessary underscore at the end of variable name "target".
Backpatch to 17, where this code was introduced by commit bf3ff7bf83bc.
Reported-by: Alexander Lakhin <exclusion@gmail.com>
Discussion: https://postgr.es/m/36796438-a718-cf9b-2071-b2c1b947c1b5@gmail.com
Branch
------
REL_17_STABLE
Details
-------
https://git.postgresql.org/pg/commitdiff/3a9d0d774d90c41bd60a8fb85685092d3e0bc30f
Modified Files
--------------
src/include/port/atomics.h | 17 ++++++-----------
src/include/port/atomics/arch-ppc.h | 2 ++
src/include/port/atomics/arch-x86.h | 2 ++
src/include/port/atomics/generic-gcc.h | 3 +++
src/include/port/atomics/generic-sunpro.h | 1 +
5 files changed, 14 insertions(+), 11 deletions(-)
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To: pgsql-committers@postgresql.org
Cc: alvherre@alvh.no-ip.org, pgsql-committers@lists.postgresql.org
Subject: Re: pgsql: Remove bogus assertion in pg_atomic_monotonic_advance_u64
In-Reply-To: <E1sPKk9-000HuW-Kj@gemulon.postgresql.org>
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