Messages in this thread | | | Date | Mon, 4 Jan 2016 09:17:50 +0100 | From | Thierry Reding <> | Subject | Re: [PATCH] drm: powerplay: use div64_s64 instead of do_div |
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On Fri, Jan 01, 2016 at 02:07:41PM +0100, Arnd Bergmann wrote: > The newly added code for Fiji creates a correct compiler warning > about invalid use of the do_div macro: > > In file included from powerplay/hwmgr/ppatomctrl.c:31:0: > drivers/gpu/drm/amd/amdgpu/../powerplay/hwmgr/ppevvmath.h: In function 'fDivide': > drivers/gpu/drm/amd/amdgpu/../powerplay/hwmgr/ppevvmath.h:382:89: warning: comparison of distinct pointer types lacks a cast > do_div(longlongX, longlongY); /*Q(32,32) divided by Q(16,16) = Q(16,16) Back to original format */ > > do_div() divides an unsigned 64-bit number by an unsigned 32-bit number. > The code instead wants to divide two signed 64-bit numbers, which is done > using the div64_s64 function. > > Signed-off-by: Arnd Bergmann <arnd@arndb.de> > Fixes: 770911a3cfbb ("drm/amd/powerplay: add/update headers for Fiji SMU and DPM") > --- > Found on ARM allmodconfig on yesterday's linux-next
Reviewed-by: Thierry Reding <treding@nvidia.com> [unhandled content-type:application/pgp-signature] | |