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locks: Allow disabling mandatory locking at compile time

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Mandatory locking appears to be almost unused and buggy and there
appears no real interest in doing anything with it.  Since effectively
no one uses the code and since the code is buggy let's allow it to be
disabled at compile time.  I would just suggest removing the code but
undoubtedly that will break some piece of userspace code somewhere.

For the distributions that don't care about this piece of code
this gives a nice starting point to make mandatory locking go away.

Cc: Benjamin Coddington <[email protected]>
Cc: Dmitry Vyukov <[email protected]>
Cc: Jeff Layton <[email protected]>
Cc: J. Bruce Fields <[email protected]>
Signed-off-by: "Eric W. Biederman" <[email protected]>
Signed-off-by: Jeff Layton <[email protected]>
This commit is contained in:
Jeff Layton 2015-11-16 09:49:34 -05:00
commit 9e8925b67a
4 changed files with 62 additions and 34 deletions
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10
fs/Kconfig
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@ -67,6 +67,16 @@ config FILE_LOCKING
for filesystems like NFS and for the flock() system
call. Disabling this option saves about 11k.
config MANDATORY_FILE_LOCKING
bool "Enable Mandatory file locking"
depends on FILE_LOCKING
default y
help
This option enables files appropriately marked files on appropriely
mounted filesystems to support mandatory locking.
To the best of my knowledge this is dead code that no one cares about.
source "fs/notify/Kconfig"
source "fs/quota/Kconfig"