X-Git-Url: http://git.cascardo.info/?a=blobdiff_plain;f=mm%2Fmsync.c;h=a5c673669ca654b8ca1c1e8508e511345484bb27;hb=0e9848c0ec5a8f57e98264ae532b6adcaeecac3b;hp=632df4527c0122062d9332a0d483835274ed62f6;hpb=2d8ad8719591fa803b0d589ed057fa46f49b7155;p=cascardo%2Flinux.git

diff --git a/mm/msync.c b/mm/msync.c
index 632df4527c01..a5c673669ca6 100644
--- a/mm/msync.c
+++ b/mm/msync.c
@@ -58,6 +58,7 @@ SYSCALL_DEFINE3(msync, unsigned long, start, size_t, len, int, flags)
 	vma = find_vma(mm, start);
 	for (;;) {
 		struct file *file;
+		loff_t fstart, fend;
 
 		/* Still start < end. */
 		error = -ENOMEM;
@@ -77,12 +78,17 @@ SYSCALL_DEFINE3(msync, unsigned long, start, size_t, len, int, flags)
 			goto out_unlock;
 		}
 		file = vma->vm_file;
+		fstart = start + ((loff_t)vma->vm_pgoff << PAGE_SHIFT);
+		fend = fstart + (min(end, vma->vm_end) - start) - 1;
 		start = vma->vm_end;
 		if ((flags & MS_SYNC) && file &&
 				(vma->vm_flags & VM_SHARED)) {
 			get_file(file);
 			up_read(&mm->mmap_sem);
-			error = vfs_fsync(file, 0);
+			if (vma->vm_flags & VM_NONLINEAR)
+				error = vfs_fsync(file, 1);
+			else
+				error = vfs_fsync_range(file, fstart, fend, 1);
 			fput(file);
 			if (error || start >= end)
 				goto out;