Re: [PATCH 1/2] include: add new file for cache-related definitions

[Samuel Thibault]

Justus Winter, le Tue 07 Jan 2014 15:51:27 +0100, a écrit :
> * include/cache.h (__cacheline_aligned): This macro can be used to
> align statically allocated objects so that they start at a cache line.

Ack. You could already use it in kern/slab.h

> ---
>  include/cache.h | 25 +++++++++++++++++++++++++
>  1 file changed, 25 insertions(+)
>  create mode 100644 include/cache.h
> 
> diff --git a/include/cache.h b/include/cache.h
> new file mode 100644
> index 0000000..6260366
> --- /dev/null
> +++ b/include/cache.h
> @@ -0,0 +1,25 @@
> +/*
> + * Copyright (c) 2013 Free Software Foundation.
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License as published by
> + * the Free Software Foundation; either version 2 of the License, or
> + * (at your option) any later version.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program.  If not, see <http://www.gnu.org/licenses/>.
> + */
> +
> +#ifndef _MACH_CACHE_H_
> +#define _MACH_CACHE_H_
> +
> +/* This macro can be used to align statically allocated objects so
> +   that they start at a cache line. */
> +#define  __cacheline_aligned __attribute__((aligned(1 << CPU_L1_SHIFT)))
> +
> +#endif /* _MACH_CACHE_H_ */
> -- 
> 1.8.5.2
> 

-- 
Samuel
We are Pentium of Borg. Division is futile. You will be approximated.
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