[PATCH v2 18/20] mm/mshare: provide a way to identify an mm as an mshare host mm

[Anthony Yznaga]

Add new mm flag, MMF_MSHARE.

Signed-off-by: Anthony Yznaga <anthony.yznaga@xxxxxxxxxx>
---
 include/linux/mm_types.h | 2 ++
 mm/mshare.c              | 1 +
 2 files changed, 3 insertions(+)

diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index 56d07edd01f9..392605b23c62 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -1741,6 +1741,8 @@ enum {
 #define MMF_TOPDOWN		31	/* mm searches top down by default */
 #define MMF_TOPDOWN_MASK	(1 << MMF_TOPDOWN)
 
+#define MMF_MSHARE		32	/* mm is an mshare host mm */
+
 #define MMF_INIT_MASK		(MMF_DUMPABLE_MASK | MMF_DUMP_FILTER_MASK |\
 				 MMF_DISABLE_THP_MASK | MMF_HAS_MDWE_MASK |\
 				 MMF_VM_MERGE_ANY_MASK | MMF_TOPDOWN_MASK)
diff --git a/mm/mshare.c b/mm/mshare.c
index a6106f6264cb..0a75bd3928fc 100644
--- a/mm/mshare.c
+++ b/mm/mshare.c
@@ -415,6 +415,7 @@ msharefs_fill_mm(struct inode *inode)
 		goto err_free;
 	}
 
+	set_bit(MMF_MSHARE, &mm->flags);
 	mm->mmap_base = mshare_base;
 	mm->task_size = 0;
 
-- 
2.43.5