mm: cma: release trigger

Provides a userspace interface to trigger a CMA release.

Usage:

        echo [pages] > free

This would provide testing/fuzzing access to the CMA release paths.

[[email protected]: coding-style fixes]
[[email protected]: fix build]
Signed-off-by: Sasha Levin <[email protected]>
Acked-by: Joonsoo Kim <[email protected]>
Cc: Marek Szyprowski <[email protected]>
Cc: Laura Abbott <[email protected]>
Cc: Konrad Rzeszutek Wilk <[email protected]>
Signed-off-by: Michal Hocko <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
1 file changed