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| author | Potyra, Stefan <Stefan.Potyra@elektrobit.com> | 2019-06-14 00:55:55 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-06-14 05:34:56 +0200 |
| commit | dedca63504a204dc8410d98883fdc16dffa8cb80 (patch) | |
| tree | 9c0cf66ad0333054241acc8bf3c32e32efe25109 /kernel/task_work.c | |
| parent | scripts/decode_stacktrace.sh: prefix addr2line with $CROSS_COMPILE (diff) | |
| download | linux-dedca63504a204dc8410d98883fdc16dffa8cb80.tar.xz linux-dedca63504a204dc8410d98883fdc16dffa8cb80.zip | |
mm/mlock.c: mlockall error for flag MCL_ONFAULT
If mlockall() is called with only MCL_ONFAULT as flag, it removes any
previously applied lockings and does nothing else.
This behavior is counter-intuitive and doesn't match the Linux man page.
For mlockall():
EINVAL Unknown flags were specified or MCL_ONFAULT was specified
without either MCL_FUTURE or MCL_CURRENT.
Consequently, return the error EINVAL, if only MCL_ONFAULT is passed.
That way, applications will at least detect that they are calling
mlockall() incorrectly.
Link: http://lkml.kernel.org/r/20190527075333.GA6339@er01809n.ebgroup.elektrobit.com
Fixes: b0f205c2a308 ("mm: mlock: add mlock flags to enable VM_LOCKONFAULT usage")
Signed-off-by: Stefan Potyra <Stefan.Potyra@elektrobit.com>
Reviewed-by: Daniel Jordan <daniel.m.jordan@oracle.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/task_work.c')
0 files changed, 0 insertions, 0 deletions