[PATCH AUTOSEL 5.4 5/6] x86/amd_nb: Fix compile-testing without CONFIG_AMD_NB

From: Sasha Levin
Date: Mon Nov 04 2024 - 06:11:47 EST


From: Arnd Bergmann <arnd@xxxxxxxx>

[ Upstream commit fce9642c765a18abd1db0339a7d832c29b68456a ]

node_to_amd_nb() is defined to NULL in non-AMD configs:

drivers/platform/x86/amd/hsmp/plat.c: In function 'init_platform_device':
drivers/platform/x86/amd/hsmp/plat.c:165:68: error: dereferencing 'void *' pointer [-Werror]
165 | sock->root = node_to_amd_nb(i)->root;
| ^~
drivers/platform/x86/amd/hsmp/plat.c:165:68: error: request for member 'root' in something not a structure or union

Users of the interface who also allow COMPILE_TEST will cause the above build
error so provide an inline stub to fix that.

[ bp: Massage commit message. ]

Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Signed-off-by: Borislav Petkov (AMD) <bp@xxxxxxxxx>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20241029092329.3857004-1-arnd@xxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
arch/x86/include/asm/amd_nb.h | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/arch/x86/include/asm/amd_nb.h b/arch/x86/include/asm/amd_nb.h
index 1ae4e5791afaf..a4f98a2fb5353 100644
--- a/arch/x86/include/asm/amd_nb.h
+++ b/arch/x86/include/asm/amd_nb.h
@@ -118,7 +118,10 @@ static inline bool amd_gart_present(void)

#define amd_nb_num(x) 0
#define amd_nb_has_feature(x) false
-#define node_to_amd_nb(x) NULL
+static inline struct amd_northbridge *node_to_amd_nb(int node)
+{
+ return NULL;
+}
#define amd_gart_present(x) false

#endif
--
2.43.0