Commit a0f08209 authored by Atsushi Nemoto's avatar Atsushi Nemoto Committed by Ralf Baechle
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If HZ was 1000, mdelay(2) cause overflow on multiplication in
__udelay.  We should define MAX_UDELAY_MS properly to prevent this.
Signed-off-by: default avatarAtsushi Nemoto <>
Signed-off-by: default avatarRalf Baechle <>
parent 53c2df2f
......@@ -84,4 +84,13 @@ static inline void __udelay(unsigned long usecs, unsigned long lpj)
#define udelay(usecs) __udelay((usecs),__udelay_val)
/* make sure "usecs *= ..." in udelay do not overflow. */
#if HZ >= 1000
#define MAX_UDELAY_MS 1
#elif HZ <= 200
#define MAX_UDELAY_MS 5
#define MAX_UDELAY_MS (1000 / HZ)
#endif /* _ASM_DELAY_H */
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