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-rw-r--r--include/linux/mm_types.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index 4396c7bf06d1..434b3ac8a351 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -1104,5 +1104,6 @@ typedef unsigned int __bitwise zap_flags_t;
#define FOLL_FAST_ONLY 0x80000 /* gup_fast: prevent fall-back to slow gup */
#define FOLL_PCI_P2PDMA 0x100000 /* allow returning PCI P2PDMA pages */
#define FOLL_INTERRUPTIBLE 0x200000 /* allow interrupts from generic signals */
+#define FOLL_UNLOCKABLE 0x400000 /* allow unlocking the mmap lock (internal only) */
#endif /* _LINUX_MM_TYPES_H */