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| author | Brooks Davis <brooks@FreeBSD.org> | 2024-10-04 20:34:03 +0000 |
|---|---|---|
| committer | Brooks Davis <brooks@FreeBSD.org> | 2024-10-04 20:34:03 +0000 |
| commit | d0af970e3ce4a7e2108a4bc2442c6c98f6aa4ffa (patch) | |
| tree | 6d8d5dabc6be1fcf2b4fded2ef9be3eeaba5e57e | |
| parent | e0c37c160b115b0bf41847ab60a5dabf0dc71300 (diff) | |
| download | src-d0af970e3ce4a7e2108a4bc2442c6c98f6aa4ffa.tar.gz src-d0af970e3ce4a7e2108a4bc2442c6c98f6aa4ffa.zip | |
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
| -rw-r--r-- | sys/sys/shm.h | 2 |
1 files changed, 1 insertions, 1 deletions
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 |