Re: [PATCH] make atomic_t volatile on all architectures

On 08/09/2007 03:31 AM, Chris Snook wrote:
> 
> Fair enough.  Casting to (volatile int *) will give us the behavior
> people expect when using atomic_t without needing to use inefficient
> barriers.
> 

You can use this forget() macro to make the compiler reread a variable:

#define forget(var) asm volatile ("" : "=m"(var))
-
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] make atomic_t volatile on all architectures
    • From: Linus Torvalds <[email protected]>
  • Re: [PATCH] make atomic_t volatile on all architectures
    • From: Martin Schwidefsky <[email protected]>

• References:
  • [PATCH] make atomic_t volatile on all architectures
    • From: Chris Snook <[email protected]>
  • Re: [PATCH] make atomic_t volatile on all architectures
    • From: Linus Torvalds <[email protected]>
  • Re: [PATCH] make atomic_t volatile on all architectures
    • From: Chris Snook <[email protected]>

• Prev by Date: Re: [PATCH 1/24] make atomic_read() behave consistently on alpha
• Next by Date: Re: [PATCH 23/25] [PATCH] paravirt hooks for arch initialization
• Previous by thread: Re: [PATCH] make atomic_t volatile on all architectures
• Next by thread: Re: [PATCH] make atomic_t volatile on all architectures
• 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]