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| author |   Jeff Layton <jlayton@kernel.org> | 2021-09-10 15:36:29 -0400 |
|---|---|---|
| committer | Jeff Layton <jlayton@kernel.org> | 2021-09-10 16:21:44 -0400 |
| commit | 90f7d7a0d0d68623b5f7df5621a8d54d9518fcc4 (patch) | |
| tree | 45d9848be89c64360b82aa49fbb19af46eb46164 /include/uapi/asm-generic/fcntl.h | |
| parent | Merge tag '5.15-rc-ksmbd-part2' of git://git.samba.org/ksmbd (diff) | |
| download | linux-dev-90f7d7a0d0d68623b5f7df5621a8d54d9518fcc4.tar.xz linux-dev-90f7d7a0d0d68623b5f7df5621a8d54d9518fcc4.zip | |
locks: remove LOCK_MAND flock lock support
As best I can tell, the logic for these has been broken for a long time
(at least before the move to git), such that they never conflict with
anything. Also, nothing checks for these flags and prevented opens or
read/write behavior on the files. They don't seem to do anything.
Given that, we can rip these symbols out of the kernel, and just make
flock(2) return 0 when LOCK_MAND is set in order to preserve existing
behavior.
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Diffstat (limited to 'include/uapi/asm-generic/fcntl.h')
| -rw-r--r-- | include/uapi/asm-generic/fcntl.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/uapi/asm-generic/fcntl.h b/include/uapi/asm-generic/fcntl.h index 9dc0bf0c5a6e..ecd0f5bdfc1d 100644 --- a/include/uapi/asm-generic/fcntl.h +++ b/include/uapi/asm-generic/fcntl.h @@ -181,6 +181,10 @@ struct f_owner_ex { blocking */ #define LOCK_UN 8 /* remove lock */ +/* + * LOCK_MAND support has been removed from the kernel. We leave the symbols + * here to not break legacy builds, but these should not be used in new code. + */ #define LOCK_MAND 32 /* This is a mandatory flock ... */ #define LOCK_READ 64 /* which allows concurrent read operations */ #define LOCK_WRITE 128 /* which allows concurrent write operations */ |