[lkml]   [2017]   [Sep]   [25]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH 07/25] hrtimer: Reduce conditional code (hres_active)
On Thu, Aug 31, 2017 at 12:23:36PM -0000, Anna-Maria Gleixner wrote:
> The hrtimer_cpu_base struct has the CONFIG_HIGH_RES_TIMERS conditional
> struct member hres_active. All related functions to this member are
> conditional as well.
> There is no functional change, when the hres_active member is unconditional
> with all related functions and is set to zero during initialization. This
> makes the code easier to read.

But you make what was a compile time dead-code-elimination into a
runtime load-and-branch.

Unless the compiler is overly clever and is able to deduce from the lack
of assignments that it must always be 0, is it?

 \ /
  Last update: 2017-09-25 15:56    [W:0.375 / U:2.912 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site