The branch main has been updated by brooks:
URL:
https://cgit.FreeBSD.org/src/commit/?id=d0af970e3ce4a7e2108a4bc2442c6c98f6aa4ffa
commit d0af970e3ce4a7e2108a4bc2442c6c98f6aa4ffa
Author: Brooks Davis <bro...@freebsd.org>
AuthorDate: 2024-10-04 20:34:03 +0000
Commit: Brooks Davis <bro...@freebsd.org>
CommitDate: 2024-10-04 20:34:03 +0000
sysv shm: Fix SHM_REMAP flag value
SHM_REMAP was incorrectly defined to 030000 which collides with
SHM_RDONLY and SHM_RND. Renumber to 040000 (incidentally matching
Linux).
This is an ABI break, but the previous ABI was unusable (SHM_REMAP would
imply SHM_RDONLY and vice versa). Fortunately SHM_REMAP has very few
consumers in the wild (I spotted openjdk for Linux, libfabric, MIPCH,
and one other MPI thing in Debian code search)
Reviewed by: kib
Fixes: ea7e7006db10 Implement shmat(2) flag SHM_REMAP.
Differential Revision: https://reviews.freebsd.org/D46825
---
sys/sys/shm.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/sys/sys/shm.h b/sys/sys/shm.h
index d80de811ef7d..df32230dcdc7 100644
--- a/sys/sys/shm.h
+++ b/sys/sys/shm.h
@@ -51,7 +51,7 @@
#define SHM_RDONLY 010000 /* Attach read-only (else read-write) */
#define SHM_RND 020000 /* Round attach address to SHMLBA */
-#define SHM_REMAP 030000 /* Unmap before mapping */
+#define SHM_REMAP 040000 /* Unmap before mapping */
#define SHMLBA PAGE_SIZE /* Segment low boundary address multiple */
/* "official" access mode definitions; somewhat braindead since you have
