[PATCH v2] s390x: add kdump sysconfig option to use the kexec_file_load() syscall

[Lianbo Jiang]

Currently, kernel has supported the kexec_file_load() syscall on s390x,
so I follow this commit:
6a20bd54473e ("kdump-lib: switch to the kexec_file_load() syscall on
x86_64 by default")

And also enable the kexec_file_load() syscall for kdump on s390x by
default.

Signed-off-by: Lianbo Jiang 
---
Changes since v1:
[1] Remove the change for arm64 because fedora kernel doesn't support
the file load.

kdump.sysconfig.s390x | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/kdump.sysconfig.s390x b/kdump.sysconfig.s390x
index abd45a2f332d..75ff2a25f37b 100644
--- a/kdump.sysconfig.s390x
+++ b/kdump.sysconfig.s390x
@@ -41,3 +41,9 @@ KDUMP_IMG="vmlinuz"

#What is the images extension.  Relocatable kernels don't have one
 KDUMP_IMG_EXT=""
+
+# Using kexec file based syscall by default
+#
+# Here, the "on" is the only valid value to enable the kexec file load and
+# anything else is equal to the "off"(disable).
+KDUMP_FILE_LOAD="on"

[Kairui Song]

On Thu, Apr 9, 2020 at 4:25 PM Lianbo Jiang  wrote:
> Currently, kernel has supported the kexec_file_load() syscall on s390x,
> so I follow this commit:
> 6a20bd54473e ("kdump-lib: switch to the kexec_file_load() syscall on
> x86_64 by default")
>
> And also enable the kexec_file_load() syscall for kdump on s390x by
> default.
> Signed-off-by: Lianbo Jiang
>
> Changes since v1:
> [1] Remove the change for arm64 because fedora kernel doesn't support
> the file load.
>
> kdump.sysconfig.s390x | 6 ++++++
>  1 file changed, 6 insertions(+)
>
> diff --git a/kdump.sysconfig.s390x b/kdump.sysconfig.s390x
> index abd45a2f332d..75ff2a25f37b 100644
> --- a/kdump.sysconfig.s390x
> +++ b/kdump.sysconfig.s390x
> @@ -41,3 +41,9 @@ KDUMP_IMG="vmlinuz"
>
> #What is the images extension.  Relocatable kernels don't have one
>  KDUMP_IMG_EXT=""
>
> +# Using kexec file based syscall by default
> +#
> +# Here, the "on" is the only valid value to enable the kexec file load and
> +# anything else is equal to the "off"(disable).
> +KDUMP_FILE_LOAD="on"
>
> 2.17.1

Assume it's tested:
Acked-by: Kairui Song