pgsql: Add comment to explain why PGReserveSemaphores() is called early - Mailing list pgsql-committers

Add comment to explain why PGReserveSemaphores() is called early

Before commit e25626677f, PGReserveSemaphores() had to be called
before SpinlockSemaInit() because spinlocks were implemented using
semaphores on some platforms (--disable-spinlocks). Add a comment
explaining that.

Author: Ashutosh Bapat <ashutosh.bapat.oss@gmail.com>
Discussion: https://www.postgresql.org/message-id/CAExHW5seSZpPx-znjidVZNzdagGHOk06F+Ds88MpPUbxd1kTaA@mail.gmail.com
Backpatch-to: 18

Branch
------
master

Details
-------
https://git.postgresql.org/pg/commitdiff/daf3d99d2b8bebb3361163a11ef3d232002127c9

Modified Files
--------------
src/backend/storage/ipc/ipci.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)