Add a new flag to distinguish page faults handled under protection of
per-vma lock.
Signed-off-by: Suren Baghdasaryan <surenb@xxxxxxxxxx>
Reviewed-by: Laurent Dufour <laurent.dufour@xxxxxxxxxx>
---
include/linux/mm.h | 3 ++-
include/linux/mm_types.h | 1 +
2 files changed, 3 insertions(+), 1 deletion(-)
diff --git a/include/linux/mm.h b/include/linux/mm.h
index fa2b9d6e665e..a6de58bb40c7 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -472,7 +472,8 @@ static inline bool fault_flag_allow_retry_first(enum fault_flag flags)
{ FAULT_FLAG_USER, "USER" }, \
{ FAULT_FLAG_REMOTE, "REMOTE" }, \
{ FAULT_FLAG_INSTRUCTION, "INSTRUCTION" }, \
- { FAULT_FLAG_INTERRUPTIBLE, "INTERRUPTIBLE" }
+ { FAULT_FLAG_INTERRUPTIBLE, "INTERRUPTIBLE" }, \
+ { FAULT_FLAG_VMA_LOCK, "VMA_LOCK" }
/*
* vm_fault is filled by the pagefault handler and passed to the vma's
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index 88619c6a29a3..c4c43f10344a 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -1053,6 +1053,7 @@ enum fault_flag {
FAULT_FLAG_INTERRUPTIBLE = 1 << 9,
FAULT_FLAG_UNSHARE = 1 << 10,
FAULT_FLAG_ORIG_PTE_VALID = 1 << 11,
+ FAULT_FLAG_VMA_LOCK = 1 << 12,
};
typedef unsigned int __bitwise zap_flags_t;
--
2.39.1
