Re: [patch] spinlocks: remove 'volatile'

On Thu, 6 Jul 2006, Linus Torvalds wrote:
> 
> Any other use of "volatile" is almost certainly a bug, or just useless. 

Side note: it's also totally possible that a volatiles _hides_ a bug, ie 
removing the volatile ends up having bad effects, but that's because the 
software itself isn't actually following the rules (or, more commonly, the 
rules are broken, and somebody added "volatile" to hide the problem).

That's not just a theoretical notion, btw. We had _tons_ of these kinds of 
"volatile"s in the original old networking code. They were _all_ wrong. 
Every single one.

			Linus
-
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] spinlocks: remove 'volatile'
    • From: Jan Engelhardt <[email protected]>
  • Re: [patch] spinlocks: remove 'volatile'
    • From: "linux-os \(Dick Johnson\)" <[email protected]>
  • Re: [patch] spinlocks: remove 'volatile'
    • From: Jeff Garzik <[email protected]>

• References:
  • Re: [patch] uninline init_waitqueue_*() functions
    • From: Ingo Molnar <[email protected]>
  • Re: [patch] uninline init_waitqueue_*() functions
    • From: Andrew Morton <[email protected]>
  • Re: [patch] uninline init_waitqueue_*() functions
    • From: Ingo Molnar <[email protected]>
  • Re: [patch] uninline init_waitqueue_*() functions
    • From: Andrew Morton <[email protected]>
  • Re: [patch] uninline init_waitqueue_*() functions
    • From: Linus Torvalds <[email protected]>
  • Re: [patch] uninline init_waitqueue_*() functions
    • From: Ingo Molnar <[email protected]>
  • Re: [patch] uninline init_waitqueue_*() functions
    • From: Linus Torvalds <[email protected]>
  • Re: [patch] uninline init_waitqueue_*() functions
    • From: Ingo Molnar <[email protected]>
  • Re: [patch] uninline init_waitqueue_*() functions
    • From: Linus Torvalds <[email protected]>
  • Re: [patch] uninline init_waitqueue_*() functions
    • From: Linus Torvalds <[email protected]>
  • [patch] spinlocks: remove 'volatile'
    • From: Ingo Molnar <[email protected]>
  • Re: [patch] spinlocks: remove 'volatile'
    • From: "linux-os \(Dick Johnson\)" <[email protected]>
  • Re: [patch] spinlocks: remove 'volatile'
    • From: Linus Torvalds <[email protected]>

• Prev by Date: Re: [PATCH 1/1] Only use ARCH_PFN_OFFSET once during boot
• Next by Date: Re: [PATCH] ixgb: add PCI Error recovery callbacks
• Previous by thread: Re: [patch] spinlocks: remove 'volatile'
• Next by thread: Re: [patch] spinlocks: remove 'volatile'
• 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]