On Thu, Jan 25, 2007 at 11:16:12AM -0500, Mathieu Desnoyers wrote:
> From: Mathieu Desnoyers <[email protected]>
> To: [email protected]
> Cc: Linus Torvalds <[email protected]>, Andrew Morton <[email protected]>,
> Ingo Molnar <[email protected]>,
> Greg Kroah-Hartman <[email protected]>,
> Christoph Hellwig <[email protected]>, [email protected],
> [email protected],
> Douglas Niehaus <[email protected]>,
> "Martin J. Bligh" <[email protected]>,
> Thomas Gleixner <[email protected]>,
> Paul Mackerras <[email protected]>,
> Mathieu Desnoyers <[email protected]>
How about copying the MIPS maintainer or linux-mips mailing list instead
of a zillion people who probably don't care?
> Subject: [PATCH 05/10] local_t : mips extension
> Date: Thu, 25 Jan 2007 11:16:12 -0500
>
> local_t : mips extension
>
> Signed-off-by: Mathieu Desnoyers <[email protected]>
> --- a/include/asm-mips/local.h
> +++ b/include/asm-mips/local.h
> @@ -1,60 +1,524 @@
> -#ifndef _ASM_LOCAL_H
> -#define _ASM_LOCAL_H
> +#ifndef _ARCH_POWERPC_LOCAL_H
> +#define _ARCH_POWERPC_LOCAL_H
The subject claims this is a MIPS patch ;-)
> #include <linux/percpu.h>
> #include <asm/atomic.h>
>
> -#ifdef CONFIG_32BIT
> +typedef struct
> +{
> + local_long_t a;
> +} local_t;
>
> -typedef atomic_t local_t;
> +#define LOCAL_INIT(i) { local_LONG_INIT(i) }
>
> -#define LOCAL_INIT(i) ATOMIC_INIT(i)
> -#define local_read(v) atomic_read(v)
> -#define local_set(v,i) atomic_set(v,i)
> +#define local_read(l) local_long_read(&(l)->a)
> +#define local_set(l,i) local_long_set(&(l)->a, (i))
>
> -#define local_inc(v) atomic_inc(v)
> -#define local_dec(v) atomic_dec(v)
> -#define local_add(i, v) atomic_add(i, v)
> -#define local_sub(i, v) atomic_sub(i, v)
> +#define local_add(i,l) local_long_add((i),(&(l)->a))
> +#define local_sub(i,l) local_long_sub((i),(&(l)->a))
> +#define local_inc(l) local_long_inc(&(l)->a)
> +#define local_dec(l) local_long_dec(&(l)->a)
>
> -#endif
>
> -#ifdef CONFIG_64BIT
> +#ifndef CONFIG_64BITS
There is no CONFIG_64BITS
> -typedef atomic64_t local_t;
> +/*
> + * Same as above, but return the result value
> + */
> +static __inline__ int local_add_return(int i, local_t * l)
> +{
> + unsigned long result;
> +
> + if (cpu_has_llsc && R10000_LLSC_WAR) {
Missing #include <asm/war.h>.
> + unsigned long temp;
> +
> + __asm__ __volatile__(
> + " .set mips3 \n"
> + "1: ll %1, %2 # local_add_return \n"
> + " addu %0, %1, %3 \n"
> + " sc %0, %2 \n"
> + " beqzl %0, 1b \n"
> + " addu %0, %1, %3 \n"
> + " .set mips0 \n"
> + : "=&r" (result), "=&r" (temp), "=m" (&(l->a.counter))
> + : "Ir" (i), "m" (&(l->a.counter))
> + : "memory");
> + } else if (cpu_has_llsc) {
> + unsigned long temp;
> +
> + __asm__ __volatile__(
> + " .set mips3 \n"
> + "1: ll %1, %2 # local_add_return \n"
> + " addu %0, %1, %3 \n"
> + " sc %0, %2 \n"
> + " beqz %0, 1b \n"
> + " addu %0, %1, %3 \n"
> + " .set mips0 \n"
> + : "=&r" (result), "=&r" (temp), "=m" (&(l->a.counter))
> + : "Ir" (i), "m" (&(l->a.counter))
> + : "memory");
> + } else {
> + unsigned long flags;
> +
> + local_irq_save(flags);
> + result = &(l->a.counter);
> + local_irq_restore(flags);
> + }
Asigning some pointer value to an integer variable with no cast?
> + result += i;
> + &(l->a.counter) = result;
Invalid lvalue in assignment.
What I generally dislike about this patch is that several fairly large
functions have been duplicated with only little change.
Ralf
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