Re: [patch 3/8] mutex subsystem, add atomic_*_call_if_*() to i386

* Linus Torvalds <[email protected]> wrote:

> 
> On Wed, 21 Dec 2005, Ingo Molnar wrote:
> >
> > add two new atomic ops to i386: atomic_dec_call_if_negative() and
> > atomic_inc_call_if_nonpositive(), which are conditional-call-if
> > atomic operations. Needed by the new mutex code.
> 
> Umm. This asm is broken. It doesn't mark %eax as changed, [...]

hm, i thought gcc treats all explicitly used register in the asm as 
clobbered - and i'm using %%eax explicitly for that reason. Or is that 
only the case if that's an input/output register as well?

	Ingo
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

---

• Follow-Ups:
  • Re: [patch 3/8] mutex subsystem, add atomic_*_call_if_*() to i386
    • From: Linus Torvalds <[email protected]>

• References:
  • [patch 3/8] mutex subsystem, add atomic_*_call_if_*() to i386
    • From: Ingo Molnar <[email protected]>
  • Re: [patch 3/8] mutex subsystem, add atomic_*_call_if_*() to i386
    • From: Linus Torvalds <[email protected]>

• Prev by Date: Re: [RFC][PATCH 1/6] RTC subsystem, class
• Next by Date: Re: 2.6.14-rt22 (and mainline) excessive latency
• Previous by thread: Re: [patch 3/8] mutex subsystem, add atomic_*_call_if_*() to i386
• Next by thread: Re: [patch 3/8] mutex subsystem, add atomic_*_call_if_*() to i386
• Index(es):
  • Date
  • Thread

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]