Sachin Sant <sachinp@xxxxxxxxxxxxx> writes:
> Linux-next (5.19.0-rc8-next-20220728) fails to build on powerpc with
> following error:
>
> ERROR: modpost: "memory_add_physaddr_to_nid" [drivers/cxl/cxl_pmem.ko] undefined!
> make[1]: *** [scripts/Makefile.modpost:128: modules-only.symvers] Error 1
>
> The code in question was last changed by following patch:
>
> commit 04ad63f086d1
> cxl/region: Introduce cxl_pmem_region objects
This should fix it.
Dan, do you want to apply that on top of your tree to reduce the window
of breakage?
cheers
>From 8ca5b098b6ff1048953be748dbffc987996e2605 Mon Sep 17 00:00:00 2001
From: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Date: Fri, 29 Jul 2022 16:13:55 +1000
Subject: [PATCH] powerpc/mm: Export memory_add_physaddr_to_nid() for modules
The cxl_pmem module wants to call memory_add_physaddr_to_nid(), so
export the symbol.
Fixes: 04ad63f086d1 ("cxl/region: Introduce cxl_pmem_region objects")
Reported-by: Sachin Sant <sachinp@xxxxxxxxxxxxx>
Signed-off-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
---
arch/powerpc/mm/mem.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c
index 7b0d286bf9ba..01772e79fd93 100644
--- a/arch/powerpc/mm/mem.c
+++ b/arch/powerpc/mm/mem.c
@@ -55,6 +55,7 @@ int memory_add_physaddr_to_nid(u64 start)
{
return hot_add_scn_to_nid(start);
}
+EXPORT_SYMBOL_GPL(memory_add_physaddr_to_nid);
#endif
int __weak create_section_mapping(unsigned long start, unsigned long end,
--
2.35.3
