From: Petr Tesarik <ptesarik@suse.com>
Subject: Define SYS_getrandom if needed
Upstream: never, build fix for SLE12

SLE12 did not provide a definition for SYS_getrandom.

Signed-off-by: Petr Tesarik <ptesarik@suse.com>
---
 configure.ac                      |    1 +
 kexec/arch/arm64/kexec-arm64.c    |    5 +++++
 kexec/arch/i386/x86-linux-setup.c |   11 ++++++++++-
 3 files changed, 16 insertions(+), 1 deletion(-)

--- a/configure.ac
+++ b/configure.ac
@@ -203,6 +203,7 @@ if test "$with_xen" = dl ; then
 		AC_MSG_NOTICE([Xen support disabled]))])
 fi
 
+AC_CHECK_HEADERS([sys/random.h])
 dnl Check for the Xen kexec_status hypercall - reachable from --with-xen=yes|dl
 if test "$ac_cv_lib_xenctrl_xc_kexec_load" = yes ; then
 	AC_CHECK_LIB(xenctrl, xc_kexec_status,
--- a/kexec/arch/arm64/kexec-arm64.c
+++ b/kexec/arch/arm64/kexec-arm64.c
@@ -34,6 +34,11 @@
 #include "mem_regions.h"
 #include "arch/options.h"
 
+#ifndef __NR_getrandom
+#define __NR_getrandom 278
+__SYSCALL(__NR_getrandom, sys_getrandom)
+#endif
+
 #define ROOT_NODE_ADDR_CELLS_DEFAULT 1
 #define ROOT_NODE_SIZE_CELLS_DEFAULT 1
 
--- a/kexec/arch/i386/x86-linux-setup.c
+++ b/kexec/arch/i386/x86-linux-setup.c
@@ -24,7 +24,6 @@
 #include <limits.h>
 #include <sys/types.h>
 #include <sys/stat.h>
-#include <sys/random.h>
 #include <fcntl.h>
 #include <sys/ioctl.h>
 #include <linux/fb.h>
@@ -38,6 +37,16 @@
 #include "x86-linux-setup.h"
 #include "../../kexec/kexec-syscall.h"
 
+#ifdef HAVE_SYS_RANDOM_H
+#include <sys/random.h>
+#else
+#include <linux/random.h>
+static ssize_t getrandom(void *buf, size_t buflen, unsigned int flags)
+{
+	return syscall(SYS_getrandom, buf, buflen, flags);
+}
+#endif
+
 #ifndef VIDEO_CAPABILITY_64BIT_BASE
 #define VIDEO_CAPABILITY_64BIT_BASE (1 << 1)	/* Frame buffer base is 64-bit */
 #endif