Re: [PATCH 11/23] make atomic_read() and atomic_set() behavior consistent on m32r

[David Howells]

Segher Boessenkool <[EMAIL PROTECTED]> wrote:

> This simply isn't true.  The compiler *can* combine asm stuff:
> 
> 
> typedef struct { int counter; } atomic_t;
> 
> static inline __attribute__((pure)) int atomic_read(const atomic_t *v)
> {
>         int x;
>         asm("ld %0,@%1" : "=r"(x) : "r"(&v->counter), "m"(v->counter));
>         return x;
> }

That's not precisely combining asm stuff.  The compiler is ditching a whole
function because you've told it it can cache the result.

David
-
To unsubscribe from this list: send the line "unsubscribe linux-arch" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at  http://vger.kernel.org/majordomo-info.html