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-rw-r--r--include/linux/fcntl.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/fcntl.h b/include/linux/fcntl.h
index 996f5611cd59..40b93265d4ba 100644
--- a/include/linux/fcntl.h
+++ b/include/linux/fcntl.h
@@ -3,6 +3,10 @@
#include <asm/fcntl.h>
+/* Cancel a blocking posix lock; internal use only until we expose an
+ * asynchronous lock api to userspace: */
+#define F_CANCELLK (F_LINUX_SPECIFIC_BASE+5)
+
#define F_SETLEASE (F_LINUX_SPECIFIC_BASE+0)
#define F_GETLEASE (F_LINUX_SPECIFIC_BASE+1)
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