[lkml]   [2019]   [Dec]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [RFC PATCH v2 07/10] lib: vdso: don't use READ_ONCE() in __c_kernel_time()
On Mon, Dec 23, 2019 at 6:31 AM Christophe Leroy
<> wrote:
> READ_ONCE() forces the read of the 64 bit value of
> vd[CS_HRES_COARSE].basetime[CLOCK_REALTIME].sec allthough
> only the lower part is needed.

Seems reasonable and very unlikely to be harmful. That being said,
this function really ought to be considered deprecated -- 32-bit
time_t is insufficient.

Do you get even better code if you move the read into the if statement?

Reviewed-by: Andy Lutomirski <>


 \ /
  Last update: 2019-12-24 02:59    [W:0.269 / U:3.876 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site