mm/khugepaged: refactor collapse_file control flow

Add a rollback label to deal with failure, instead of continuously
checking for RESULT_SUCCESS, to make it easier to add more failure cases. 
The refactoring also allows the collapse_file tracepoint to include hpage
on success (instead of NULL).

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: David Stevens <[email protected]>
Acked-by: Peter Xu <[email protected]>
Reviewed-by: Yang Shi <[email protected]>
Acked-by: Hugh Dickins <[email protected]>
Cc: David Hildenbrand <[email protected]>
Cc: Jiaqi Yan <[email protected]>
Cc: "Kirill A. Shutemov" <[email protected]>
Cc: Matthew Wilcox (Oracle) <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

0 files changed, 0 insertions, 0 deletions