[PATCH v4 3/4] liveupdate: luo_session: include linux/mm.h for virt/phys translation

[George Guo <dongtai.guo@linux.dev>]

From: George Guo <guodongtai@kylinos.cn>

luo_session.c calls virt_to_phys() and phys_to_virt(). On LoongArch with
CONFIG_KFENCE=y, these macros (in arch/loongarch/include/asm/io.h) expand
to offset_in_page() and page_address(), both declared in <linux/mm.h>.

Since luo_session.c only includes <linux/io.h>, the translation unit fails
to build with CONFIG_KFENCE=y:

  asm/io.h: error: implicit declaration of function 'offset_in_page'
  asm/io.h: error: implicit declaration of function 'page_address'

Add the missing include to fix these build errors.

Co-developed-by: Kexin Liu <liukexin@kylinos.cn>
Signed-off-by: Kexin Liu <liukexin@kylinos.cn>
Signed-off-by: George Guo <guodongtai@kylinos.cn>
Acked-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
---
 kernel/liveupdate/luo_session.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/liveupdate/luo_session.c b/kernel/liveupdate/luo_session.c
index f38b5b18f3f8..31490ac7b63d 100644
--- a/kernel/liveupdate/luo_session.c
+++ b/kernel/liveupdate/luo_session.c
@@ -94,6 +94,7 @@
 #include <linux/kho/abi/luo.h>
 #include <linux/list.h>
 #include <linux/liveupdate.h>
+#include <linux/mm.h>
 #include <linux/mutex.h>
 #include <linux/rwsem.h>
 #include <linux/slab.h>
-- 
2.53.0