qemu-usermode: linux-user: disable commpage.

[qemu-usermode] linux-user: disable commpage. JB#51953
It will break when we run i686 SailfishSDK on 64 bit kernels.

rpm/0001-linux-user-disable-commpage.patch

@@ -0,0 +1,46 @@
+From 456bf439bdaa2cefede8b09f224a660b8aee8353 Mon Sep 17 00:00:00 2001
+From: Frajo Haider <f_haider@gmx.at>
+Date: Tue, 8 Dec 2020 00:19:06 +0200
+Subject: [PATCH 1/1] linux-user: disable commpage
+
+---
+ linux-user/elfload.c | 8 +++++++-
+ 1 file changed, 7 insertions(+), 1 deletion(-)
+
+diff --git a/linux-user/elfload.c b/linux-user/elfload.c
+index fe9dfe795d..d18dca677a 100644
+--- a/linux-user/elfload.c
++++ b/linux-user/elfload.c
+@@ -4,6 +4,9 @@
+
+ #include <sys/resource.h>
+ #include <sys/shm.h>
++#include <unistd.h>
++#include <sys/syscall.h>
++#include <sys/utsname.h>
+
+ #include "qemu.h"
+ #include "disas/disas.h"
+@@ -383,8 +386,10 @@ enum {
+
+ /* The commpage only exists for 32 bit kernels */
+
+-#define ARM_COMMPAGE (intptr_t)0xffff0f00u
++#define ARM_COMMPAGE 0
++#define init_guest_commpage() true
+
++#if 0
+ static bool init_guest_commpage(void)
+ {
+     void *want = g2h(ARM_COMMPAGE & -qemu_host_page_size);
+@@ -408,6 +413,7 @@ static bool init_guest_commpage(void)
+     }
+     return true;
+ }
++#endif
+
+ #define ELF_HWCAP get_elf_hwcap()
+ #define ELF_HWCAP2 get_elf_hwcap2()
+-- 
+2.26.2
+

rpm/qemu-usermode.spec

@@ -32,7 +32,7 @@ Patch13: 0017-Revert-linux-user-Use-safe_syscall-wrapper-for-fcntl.patch
 Patch14: 0018-linux-user-Support-f_flags-in-statfs64-when-availabl.patch
 
 Patch19: 0001-Force-AVX2-off.patch
-Patch20: 0001-linux-user-don-t-fail-if-commpage-is-not-usable.patch
+Patch20: 0001-linux-user-disable-commpage.patch
 
 BuildRequires:  pkgconfig(ext2fs)
 BuildRequires:  pkgconfig(glib-2.0)