Re: spin_lock forgets to clobber memory and other smp fixes [wasRe: [patch] waitqueue optimization, 2.4.0-test7]

[Andrea Arcangeli]

On Thu, 7 Sep 2000, Jamie Lokier wrote:

>int *p;
>int func()
>{
>  int x;
>  x = *p;
>  __asm__ __volatile__ ("" : : : "memory");
>  x = *p;
>  return x;
>}
>

Defintely none difference here (-fstrict-aliasing doesn't change anything
either).

andrea@inspiron:~ > gcc -v
Reading specs from /usr/lib/gcc-lib/i486-suse-linux/2.95.2/specs
gcc version 2.95.2 19991024 (release)

Andrea

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [EMAIL PROTECTED]
Please read the FAQ at http://www.tux.org/lkml/