Re: [PATCH] Combined APM patch

Thomas Hood (jdthood@mail.com)
10 Jan 2002 07:51:05 -0500


Just browsing the diff between my patch and Stephen's, I have
a couple of questions.

< static int suspends_pending; /* = 0 */

---
> static int			suspends_pending;

Is it not good practice to note when the code _assumes_ zero- initialization? I have seen comments like these elsewhere in the kernel sources.

< static int use_apm_idle; /* = 0 */ < static unsigned int last_jiffies; /* = 0 */ < static unsigned int last_stime; /* = 0 */

---
> 	static int use_apm_idle = 0;
> 	static unsigned int last_jiffies = 0;
> 	static unsigned int last_stime = 0;

Are static variables defined within functions not initialized to zero at load time, as global static variables are?

< ignore_sys_suspend = 0;

---
> 			waiting_for_resume = 0;

Don't you think "ignore_sys_suspend" is a name more consistent with the other "ignore_yadda_yadda" variable names? Minor issue.

Everything else looks good to me.

On Sun, 2002-01-06 at 23:52, Stephen Rothwell wrote: > This is my version of the combined APM patches; > > Change notification order so that user mode is notified > before drivers of impending suspends. > Move the idling back into the idle loop. > A couple of small tidy ups. > > See header comments for attributions. > > This works for me (including as a module). > > Please test and let me know - it seems to lower my power requirements > by about 10% on my Thinkpad (over stock 2.4.17). > > http://www.canb.auug.org.au/~sfr/2.4.17-APM.1.diff

The kernel compiles fine with your patch; I'll test over the next few days.

Thanks Thomas

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