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-rw-r--r--include/linux/clocksource.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/clocksource.h b/include/linux/clocksource.h
index cfc75848a35d..f2b10d9ebd04 100644
--- a/include/linux/clocksource.h
+++ b/include/linux/clocksource.h
@@ -120,7 +120,7 @@ struct clocksource {
#define CLOCK_SOURCE_RESELECT 0x100
/* simplify initialization of mask field */
-#define CLOCKSOURCE_MASK(bits) (u64)((bits) < 64 ? ((1ULL<<(bits))-1) : -1)
+#define CLOCKSOURCE_MASK(bits) GENMASK_ULL((bits) - 1, 0)
static inline u32 clocksource_freq2mult(u32 freq, u32 shift_constant, u64 from)
{