Fix comment about remap_file_pages From: Paolo 'Blaisorblade' Giarrusso This comment is a bit unclear and also stale. So fix it. Thanks to Hugh Dickins for explaining me what it really referred to, and correcting my first fix. Signed-off-by: Paolo 'Blaisorblade' Giarrusso --- mm/fremap.c | 7 ++++--- 1 files changed, 4 insertions(+), 3 deletions(-) diff --git a/mm/fremap.c b/mm/fremap.c index 21b7d0c..cdeabad 100644 --- a/mm/fremap.c +++ b/mm/fremap.c @@ -215,9 +215,10 @@ #endif pgoff, flags & MAP_NONBLOCK); /* - * We can't clear VM_NONLINEAR because we'd have to do - * it after ->populate completes, and that would prevent - * downgrading the lock. (Locks can't be upgraded). + * We would like to clear VM_NONLINEAR, in the case when + * sys_remap_file_pages covers the whole vma, so making + * it linear again. But cannot do so until after a + * successful populate, and have no way to upgrade sem. */ } if (likely(!has_write_lock))