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However, ENOTSUPP is not a standard error value that userspace knows about. The acceptable userspace-visible errno to use is EOPNOTSUPP. checkpatch.pl has a warning to this affect. Fixes: 9651fcedf7b9 ("mm: add MAP_DROPPABLE for designating always lazily freeable mappings") Cc: Signed-off-by: Anthony Yznaga --- mm/mmap.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/mmap.c b/mm/mmap.c index 5754d1c36462..2311ae7c2ff4 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -504,7 +504,7 @@ unsigned long do_mmap(struct file *file, unsigned long addr, break; case MAP_DROPPABLE: if (VM_DROPPABLE == VM_NONE) - return -ENOTSUPP; + return -EOPNOTSUPP; /* * A locked or stack area makes no sense to be droppable. * -- 2.47.3