kexec-tools: fix arm kexec failure for __NR_kexec_file_load

Once use kexec in arm arch, it will throw out the error info as below:

Could not find a free area of memory of 0xc78e744 bytes...

This is because that kexec use kexec_file_load to load image by default
but arm doesn't support it. So add this patch to avoid use kexec_file_load
in arm platforms.

(From OE-Core rev: 952a3fa77c80f16cd6d97f35afdb474876a39483)

Signed-off-by: Quanyang Wang <quanyang.wang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 41 insertions, 0 deletions

diff --git a/meta/recipes-kernel/kexec/kexec-tools/0006-kexec-arm-undefine-__NR_kexec_file_load-for-arm.patch b/meta/recipes-kernel/kexec/kexec-tools/0006-kexec-arm-undefine-__NR_kexec_file_load-for-arm.patch
new file mode 100644
index 0000000000..6811dfa597
--- /dev/null
+++ b/meta/recipes-kernel/kexec/kexec-tools/0006-kexec-arm-undefine-__NR_kexec_file_load-for-arm.patch
@@ -0,0 +1,40 @@
+From b54816eff272324320c490d62dc36b27d2838732 Mon Sep 17 00:00:00 2001
+From: Quanyang Wang <quanyang.wang@windriver.com>
+Date: Mon, 16 Sep 2019 10:49:05 +0800
+Subject: [PATCH] kexec/arm: undefine __NR_kexec_file_load for arm
+
+In the kernel upstream commit 4ab65ba7a5cb
+("ARM: add kexec_file_load system call number"),
+__NR_kexec_file_load for arm has been defined to be 401.
+This results that even if kexec_file_load isn't implemented
+for arm but the function is_kexec_file_load_implemented()
+will still return true. So undef __NR_kexec_file_load for
+arm architecture.
+
+Upstream-Status: Backport
+[https://git.kernel.org/pub/scm/utils/kernel/kexec/kexec-tools.git/commit/kexec/kexec-syscall.h?id=b54816eff272324320c490d62dc36b27d2838732]
+
+Signed-off-by: Quanyang Wang <quanyang.wang@windriver.com>
+Signed-off-by: Simon Horman <horms@verge.net.au>
+---
+ kexec/kexec-syscall.h | 4 ++++
+ 1 file changed, 4 insertions(+)
+
+diff --git a/kexec/kexec-syscall.h b/kexec/kexec-syscall.h
+index dac1c1f..92d51d3 100644
+--- a/kexec/kexec-syscall.h
++++ b/kexec/kexec-syscall.h
+@@ -56,6 +56,10 @@
+ #endif
+ #endif /*ifndef __NR_kexec_load*/
+ 
++#ifdef __arm__
++#undef __NR_kexec_file_load
++#endif
++
+ #ifndef __NR_kexec_file_load
+ 
+ #ifdef __x86_64__
+-- 
+2.17.1
+
diff --git a/meta/recipes-kernel/kexec/kexec-tools_2.0.19.bb b/meta/recipes-kernel/kexec/kexec-tools_2.0.19.bb
index 3439899070..c3f74359f1 100644
--- a/meta/recipes-kernel/kexec/kexec-tools_2.0.19.bb
+++ b/meta/recipes-kernel/kexec/kexec-tools_2.0.19.bb
@@ -18,6 +18,7 @@ SRC_URI = "${KERNELORG_MIRROR}/linux/utils/kernel/kexec/kexec-tools-${PV}.tar.gz
     file://0003-kexec-ARM-Fix-add_buffer_phys_virt-align-issue.patch \
     file://0004-x86_64-Add-support-to-build-kexec-tools-with-x32-ABI.patch \
     file://0005-Disable-PIE-during-link.patch \
+    file://0006-kexec-arm-undefine-__NR_kexec_file_load-for-arm.patch \
 "
 
 SRC_URI[md5sum] = "052458f0a35c2a3b0d2302caa3318e9f"