From d0217ac04ca6591841e5665f518e38064f4e65bd Mon Sep 17 00:00:00 2001 From: Nick Piggin Date: Thu, 19 Jul 2007 01:47:03 -0700 Subject: mm: fault feedback #1 Change ->fault prototype. We now return an int, which contains VM_FAULT_xxx code in the low byte, and FAULT_RET_xxx code in the next byte. FAULT_RET_ code tells the VM whether a page was found, whether it has been locked, and potentially other things. This is not quite the way he wanted it yet, but that's changed in the next patch (which requires changes to arch code). This means we no longer set VM_CAN_INVALIDATE in the vma in order to say that a page is locked which requires filemap_nopage to go away (because we can no longer remain backward compatible without that flag), but we were going to do that anyway. struct fault_data is renamed to struct vm_fault as Linus asked. address is now a void __user * that we should firmly encourage drivers not to use without really good reason. The page is now returned via a page pointer in the vm_fault struct. Signed-off-by: Nick Piggin Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- Documentation/feature-removal-schedule.txt | 20 +------------------- 1 file changed, 1 insertion(+), 19 deletions(-) (limited to 'Documentation/feature-removal-schedule.txt') diff --git a/Documentation/feature-removal-schedule.txt b/Documentation/feature-removal-schedule.txt index 716568afdff8..cff63befeb9a 100644 --- a/Documentation/feature-removal-schedule.txt +++ b/Documentation/feature-removal-schedule.txt @@ -135,26 +135,8 @@ Who: Greg Kroah-Hartman --------------------------- -What: filemap_nopage, filemap_populate -When: April 2007 -Why: These legacy interfaces no longer have any callers in the kernel and - any functionality provided can be provided with filemap_fault. The - removal schedule is short because they are a big maintainence burden - and have some bugs. -Who: Nick Piggin - ---------------------------- - -What: vm_ops.populate, install_page -When: April 2007 -Why: These legacy interfaces no longer have any callers in the kernel and - any functionality provided can be provided with vm_ops.fault. -Who: Nick Piggin - ---------------------------- - What: vm_ops.nopage -When: February 2008, provided in-kernel callers have been converted +When: Soon, provided in-kernel callers have been converted Why: This interface is replaced by vm_ops.fault, but it has been around forever, is used by a lot of drivers, and doesn't cost much to maintain. -- cgit v1.2.3-59-g8ed1b