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-rw-r--r--kernel/printk/printk_ringbuffer.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/printk/printk_ringbuffer.h b/kernel/printk/printk_ringbuffer.h
index bd2a892deac1..8de6c495cf2b 100644
--- a/kernel/printk/printk_ringbuffer.h
+++ b/kernel/printk/printk_ringbuffer.h
@@ -4,6 +4,7 @@
#define _KERNEL_PRINTK_RINGBUFFER_H
#include <linux/atomic.h>
+#include <linux/bits.h>
#include <linux/dev_printk.h>
#include <linux/stddef.h>
#include <linux/types.h>
@@ -122,7 +123,7 @@ enum desc_state {
#define _DATA_SIZE(sz_bits) (1UL << (sz_bits))
#define _DESCS_COUNT(ct_bits) (1U << (ct_bits))
-#define DESC_SV_BITS (sizeof(unsigned long) * 8)
+#define DESC_SV_BITS BITS_PER_LONG
#define DESC_FLAGS_SHIFT (DESC_SV_BITS - 2)
#define DESC_FLAGS_MASK (3UL << DESC_FLAGS_SHIFT)
#define DESC_STATE(sv) (3UL & (sv >> DESC_FLAGS_SHIFT))