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Commit a0f08209 authored by Atsushi Nemoto's avatar Atsushi Nemoto Committed by Ralf Baechle
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Define MAX_UDELAY_MS 


    
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 <anemo@mba.ocn.ne.jp>
Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent 53c2df2f

include/asm-mips/delay.h

+9 −0
Original line number Diff line number Diff line
@@ -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

#else

#define MAX_UDELAY_MS	(1000 / HZ)

#endif



#endif /* _ASM_DELAY_H */