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-rw-r--r--include/linux/percpu.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/percpu.h b/include/linux/percpu.h
index 31795e619273..6a5fb939d3e5 100644
--- a/include/linux/percpu.h
+++ b/include/linux/percpu.h
@@ -25,6 +25,9 @@
#define PCPU_MIN_ALLOC_SHIFT 2
#define PCPU_MIN_ALLOC_SIZE (1 << PCPU_MIN_ALLOC_SHIFT)
+/* number of bits per page, used to trigger a scan if blocks are > PAGE_SIZE */
+#define PCPU_BITS_PER_PAGE (PAGE_SIZE >> PCPU_MIN_ALLOC_SHIFT)
+
/*
* This determines the size of each metadata block. There are several subtle
* constraints around this constant. The reserved region must be a multiple of