From: Julien Grall <julien.grall@arm.com>
Date: Wed, 16 Oct 2019 11:12:51 +0000 (+0100)
Subject: xen/arm: setup: Calculate correctly the size of Xen
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=08e2059facd78d5ffaf206ba06ac2017c4adeed4;p=people%2Froyger%2Fxen.git

xen/arm: setup: Calculate correctly the size of Xen

The current size of Xen is computed using _end - _start + 1. However,
_end is pointing one past the end of Xen, so the size of Xen is
off-by-one.

Signed-off-by: Julien Grall <julien.grall@arm.com>
Release-acked-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
---

diff --git a/xen/arch/arm/setup.c b/xen/arch/arm/setup.c
index 705a917abf..51d32106b7 100644
--- a/xen/arch/arm/setup.c
+++ b/xen/arch/arm/setup.c
@@ -819,7 +819,7 @@ void __init start_xen(unsigned long boot_phys_offset,
     /* Register Xen's load address as a boot module. */
     xen_bootmodule = add_boot_module(BOOTMOD_XEN,
                              (paddr_t)(uintptr_t)(_start + boot_phys_offset),
-                             (paddr_t)(uintptr_t)(_end - _start + 1), false);
+                             (paddr_t)(uintptr_t)(_end - _start), false);
     BUG_ON(!xen_bootmodule);
 
     fdt_size = boot_fdt_info(device_tree_flattened, fdt_paddr);