From 586f4266fb4945f6ea3564b9c1bab093eb74bee4 Mon Sep 17 00:00:00 2001 From: Fujii Masao Date: Thu, 9 Apr 2026 15:30:59 +0900 Subject: [PATCH] Fix ABI break by moving PROCSIG_SLOTSYNC_MESSAGE in ProcSignalReason Commit 15910b1c363 PROCSIG_SLOTSYNC_MESSAGE in the middle of enum ProcSignalReason, breaking the ABI. Fix this by moving PROCSIG_SLOTSYNC_MESSAGE to just before the last entry, NUM_PROCSIGNALS, to restore ordering of other entries. This increases the value of NUM_PROCSIGNALS, which technically changes the ABI. However, since it represents the number of enum entries (not a signal reason), and no affected third-party code is known, this change will be recorded in .abi-compliance-history later. Per buildfarm member crake. Author: Fujii Masao Reviewed-by: Nisha Moond Discussion: https://postgr.es/m/CAHGQGwH_AAbtsiYDJt65N7_4PJ0CgOJmBEaCq68e5_tcuG_vXw@mail.gmail.com Backpatch-through: 17 only --- src/include/storage/procsignal.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/src/include/storage/procsignal.h b/src/include/storage/procsignal.h index 126c44bcf1d..58a042f1b9f 100644 --- a/src/include/storage/procsignal.h +++ b/src/include/storage/procsignal.h @@ -36,7 +36,6 @@ typedef enum PROCSIG_BARRIER, /* global barrier interrupt */ PROCSIG_LOG_MEMORY_CONTEXT, /* ask backend to log the memory contexts */ PROCSIG_PARALLEL_APPLY_MESSAGE, /* Message from parallel apply workers */ - PROCSIG_SLOTSYNC_MESSAGE, /* ask slot synchronization to stop */ /* Recovery conflict reasons */ PROCSIG_RECOVERY_CONFLICT_FIRST, @@ -49,6 +48,8 @@ typedef enum PROCSIG_RECOVERY_CONFLICT_STARTUP_DEADLOCK, PROCSIG_RECOVERY_CONFLICT_LAST = PROCSIG_RECOVERY_CONFLICT_STARTUP_DEADLOCK, + PROCSIG_SLOTSYNC_MESSAGE, /* ask slot synchronization to stop */ + NUM_PROCSIGNALS /* Must be last! */ } ProcSignalReason;