4.14-stable review patch. If anyone has any objections, please let me know.
------------------
From: Thiago Jung Bauermann bauerman@linux.vnet.ibm.com
commit bf8a1abc3ddbd6e9a8312ea7d96e5dd89c140f18 upstream.
kexec_file_load() on powerpc doesn't support kdump kernels yet, so it returns -ENOTSUPP in that case.
I've recently learned that this errno is internal to the kernel and isn't supposed to be exposed to userspace. Therefore, change to -EOPNOTSUPP which is defined in an uapi header.
This does indeed make kexec-tools happier. Before the patch, on ppc64le:
# ~bauermann/src/kexec-tools/build/sbin/kexec -s -p /boot/vmlinuz kexec_file_load failed: Unknown error 524
After the patch:
# ~bauermann/src/kexec-tools/build/sbin/kexec -s -p /boot/vmlinuz kexec_file_load failed: Operation not supported
Fixes: a0458284f062 ("powerpc: Add support code for kexec_file_load()") Cc: stable@vger.kernel.org # v4.10+ Reported-by: Dave Young dyoung@redhat.com Signed-off-by: Thiago Jung Bauermann bauerman@linux.vnet.ibm.com Reviewed-by: Simon Horman horms@verge.net.au Reviewed-by: Dave Young dyoung@redhat.com Signed-off-by: Michael Ellerman mpe@ellerman.id.au Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- arch/powerpc/kernel/machine_kexec_file_64.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/powerpc/kernel/machine_kexec_file_64.c +++ b/arch/powerpc/kernel/machine_kexec_file_64.c @@ -43,7 +43,7 @@ int arch_kexec_kernel_image_probe(struct
/* We don't support crash kernels yet. */ if (image->type == KEXEC_TYPE_CRASH) - return -ENOTSUPP; + return -EOPNOTSUPP;
for (i = 0; i < ARRAY_SIZE(kexec_file_loaders); i++) { fops = kexec_file_loaders[i];