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-rw-r--r--include/linux/swap.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/swap.h b/include/linux/swap.h
index b86b5c2..8dc0ea7 100644
--- a/include/linux/swap.h
+++ b/include/linux/swap.h
@@ -21,6 +21,9 @@ struct bio;
#define SWAP_FLAG_PRIO_SHIFT 0
#define SWAP_FLAG_DISCARD 0x10000 /* discard swap cluster after use */
+#define SWAP_FLAGS_VALID (SWAP_FLAG_PRIO_MASK | SWAP_FLAG_PREFER | \
+ SWAP_FLAG_DISCARD)
+
static inline int current_is_kswapd(void)
{
return current->flags & PF_KSWAPD;
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