From c791ace1e747371658237f0d30234fef56c39669 Mon Sep 17 00:00:00 2001 From: Dave Jiang Date: Fri, 24 Feb 2017 14:57:08 -0800 Subject: mm: replace FAULT_FLAG_SIZE with parameter to huge_fault Since the introduction of FAULT_FLAG_SIZE to the vm_fault flag, it has been somewhat painful with getting the flags set and removed at the correct locations. More than one kernel oops was introduced due to difficulties of getting the placement correctly. Remove the flag values and introduce an input parameter to huge_fault that indicates the size of the page entry. This makes the code easier to trace and should avoid the issues we see with the fault flags where removal of the flag was necessary in the fallback paths. Link: http://lkml.kernel.org/r/148615748258.43180.1690152053774975329.stgit@djiang5-desk3.ch.intel.com Signed-off-by: Dave Jiang Tested-by: Dan Williams Reviewed-by: Jan Kara Cc: Matthew Wilcox Cc: Dave Hansen Cc: Vlastimil Babka Cc: Ross Zwisler Cc: Kirill A. Shutemov Cc: Nilesh Choudhury Cc: Ingo Molnar Cc: "H. Peter Anvin" Cc: Thomas Gleixner Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/xfs/xfs_file.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) (limited to 'fs/xfs') diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c index 990e03819370..a50eca676670 100644 --- a/fs/xfs/xfs_file.c +++ b/fs/xfs/xfs_file.c @@ -1391,7 +1391,7 @@ xfs_filemap_page_mkwrite( xfs_ilock(XFS_I(inode), XFS_MMAPLOCK_SHARED); if (IS_DAX(inode)) { - ret = dax_iomap_fault(vmf, &xfs_iomap_ops); + ret = dax_iomap_fault(vmf, PE_SIZE_PTE, &xfs_iomap_ops); } else { ret = iomap_page_mkwrite(vmf, &xfs_iomap_ops); ret = block_page_mkwrite_return(ret); @@ -1418,7 +1418,7 @@ xfs_filemap_fault( xfs_ilock(XFS_I(inode), XFS_MMAPLOCK_SHARED); if (IS_DAX(inode)) - ret = dax_iomap_fault(vmf, &xfs_iomap_ops); + ret = dax_iomap_fault(vmf, PE_SIZE_PTE, &xfs_iomap_ops); else ret = filemap_fault(vmf); xfs_iunlock(XFS_I(inode), XFS_MMAPLOCK_SHARED); @@ -1435,7 +1435,8 @@ xfs_filemap_fault( */ STATIC int xfs_filemap_huge_fault( - struct vm_fault *vmf) + struct vm_fault *vmf, + enum page_entry_size pe_size) { struct inode *inode = file_inode(vmf->vma->vm_file); struct xfs_inode *ip = XFS_I(inode); @@ -1452,7 +1453,7 @@ xfs_filemap_huge_fault( } xfs_ilock(XFS_I(inode), XFS_MMAPLOCK_SHARED); - ret = dax_iomap_fault(vmf, &xfs_iomap_ops); + ret = dax_iomap_fault(vmf, pe_size, &xfs_iomap_ops); xfs_iunlock(XFS_I(inode), XFS_MMAPLOCK_SHARED); if (vmf->flags & FAULT_FLAG_WRITE) -- cgit v1.2.3