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Date: Fri, 05 Jun 2015 13:23:22 -0700 From: Guenter Roeck <linux@...ck-us.net> To: Benjamin Herrenschmidt <benh@...nel.crashing.org> CC: Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>, Tomi Valkeinen <tomi.valkeinen@...com>, linux-fbdev@...r.kernel.org, linux-kernel@...r.kernel.org, Tina Ruchandani <ruchandani.tina@...il.com> Subject: Re: [PATCH -next] fbdev: radeon: Avoid 64 bit divide On 06/05/2015 01:08 PM, Benjamin Herrenschmidt wrote: > On Fri, 2015-06-05 at 11:05 -0700, Guenter Roeck wrote: >> A 64 bit divide causes build failures with 32 bit builds, such as >> >> ERROR: "__divdi3" [drivers/video/fbdev/aty/radeonfb.ko] undefined! >> >> or >> >> drivers/built-in.o: In function `radeon_probe_pll_params': >> radeon_base.c:(.text+0x16608b): undefined reference to `__divdi3' > > What about using do_div() instead ? > delta is known to be <= 10*1000000, so I figured that would have been overkill. But, sure, at the end it is the same. Want me to resubmit ? Guenter >> Fixes: ce8f4069dce8 ("fbdev: radeon: Remove 'struct timeval' usage") >> Cc: Tina Ruchandani <ruchandani.tina@...il.com> >> Signed-off-by: Guenter Roeck <linux@...ck-us.net> >> --- >> drivers/video/fbdev/aty/radeon_base.c | 2 +- >> 1 file changed, 1 insertion(+), 1 deletion(-) >> >> diff --git a/drivers/video/fbdev/aty/radeon_base.c b/drivers/video/fbdev/aty/radeon_base.c >> index b3612e30d74f..374e47532035 100644 >> --- a/drivers/video/fbdev/aty/radeon_base.c >> +++ b/drivers/video/fbdev/aty/radeon_base.c >> @@ -492,7 +492,7 @@ static int radeon_probe_pll_params(struct radeonfb_info *rinfo) >> /* Return -1 if more than 10 seconds have elapsed */ >> if (delta > (10*1000000)) >> return -1; >> - hz = 1000000/delta; >> + hz = 1000000 / (int)delta; >> >> hTotal = ((INREG(CRTC_H_TOTAL_DISP) & 0x1ff) + 1) * 8; >> vTotal = ((INREG(CRTC_V_TOTAL_DISP) & 0x3ff) + 1); > > > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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