# This fixes a bug spotted by the iomem tester in the test suite.  mmapper
# returns -EFAULT if the mmap length is greater than the iomem region size.
# If that size is less than one page, then mmap can never succeed because
# the minimum map length is one page.  This fixes that by rounding the iomem
# file size up to the nearest page.
Index: um/arch/um/kernel/mem_user.c
===================================================================
--- um.orig/arch/um/kernel/mem_user.c	2004-07-23 19:32:13.000000000 -0400
+++ um/arch/um/kernel/mem_user.c	2004-07-23 19:36:35.000000000 -0400
@@ -141,7 +141,7 @@
 	struct iomem_region *new;
 	struct uml_stat buf;
 	char *file, *driver;
-	int fd, err;
+	int fd, err, size;
 
 	driver = str;
 	file = strchr(str,',');
@@ -169,10 +169,12 @@
 		goto out_close;
 	}
 
+	size = (buf.ust_size + UM_KERN_PAGE_SIZE) & ~(UM_KERN_PAGE_SIZE - 1);
+
 	*new = ((struct iomem_region) { .next		= iomem_regions,
 					.driver		= driver,
 					.fd		= fd,
-					.size		= buf.ust_size,
+					.size		= size,
 					.phys		= 0,
 					.virt		= 0 });
 	iomem_regions = new;