Re: [PATCH] m68k: Implement ndelay() as an inline function to force type checking/casting

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On Sun, May 13, 2018 at 5:02 PM, Boris Brezillon
<boris.brezillon@xxxxxxxxxxx> wrote:
ndelay() is supposed to take an unsigned long, but if you define
ndelay() as a macro and the caller pass an unsigned long long instead
of an unsigned long, the unsigned long long to unsigned long cast is
not done and we end up with an "undefined reference to `__udivdi3'"
error at link time.

-#define ndelay(n) __delay(DIV_ROUND_UP((n) * ((((HZSCALE) >> 11) * (loops_per_jiffy >> 11)) >> 6), 1000))
+static inline void ndelay(unsigned long nsec)
+{
+       __delay(DIV_ROUND_UP(nsec *
+                            ((((HZSCALE) >> 11) *

One pair of parens is redundant.

+                              (loops_per_jiffy >> 11)) >> 6),
+                            1000));

Can't you keep as one line as in original?

+}
+#define ndelay(n) ndelay(n)

 #endif /* defined(_M68K_DELAY_H) */
--
2.14.1




-- 
With Best Regards,
Andy Shevchenko
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