[PATCH v5 5/5] powerpc/crash hp: add crash page helper functions

[Sourabh Jain <sourabhjain@linux.ibm.com>]

Define arch_[un]map_crash_pages functions to avoid build issues due to
undefined arch specific function to access crash memory pages.

A temporary patch to avoid build issues may need some changes in
generic code to avoid this.

The issue is under discussion:
https://lkml.org/lkml/2022/6/20/22

Signed-off-by: Sourabh Jain <sourabhjain@linux.ibm.com>
---
 arch/powerpc/kexec/core_64.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/arch/powerpc/kexec/core_64.c b/arch/powerpc/kexec/core_64.c
index 373cb46bcc0e..d833fa96dcfa 100644
--- a/arch/powerpc/kexec/core_64.c
+++ b/arch/powerpc/kexec/core_64.c
@@ -492,6 +492,13 @@ int update_cpus_node(void *fdt)
 
 #if defined(CONFIG_HOTPLUG_CPU)
 
+void *arch_map_crash_pages(unsigned long paddr, unsigned long size)
+{
+	return __va(paddr);
+}
+
+void arch_unmap_crash_pages(void **ptr) { }
+
 int crash_hotplug_support(void) { return 1; }
 
 /**
-- 
2.36.1