/*****************************************************************************\ * Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC. * Copyright (C) 2007 The Regents of the University of California. * Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER). * Written by Brian Behlendorf . * UCRL-CODE-235197 * * This file is part of the SPL, Solaris Porting Layer. * For details, see . * * The SPL 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. * * The SPL 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 the SPL. If not, see . \*****************************************************************************/ #ifndef _SPL_MM_COMPAT_H #define _SPL_MM_COMPAT_H #include #include /* * Linux 2.6.31 API Change. * Individual pages_{min,low,high} moved in to watermark array. */ #ifndef min_wmark_pages #define min_wmark_pages(z) (z->pages_min) #endif #ifndef low_wmark_pages #define low_wmark_pages(z) (z->pages_low) #endif #ifndef high_wmark_pages #define high_wmark_pages(z) (z->pages_high) #endif #if !defined(HAVE_SHRINK_CONTROL_STRUCT) struct shrink_control { gfp_t gfp_mask; unsigned long nr_to_scan; }; #endif /* HAVE_SHRINK_CONTROL_STRUCT */ /* * 2.6.xx API compat, * There currently exists no exposed API to partially shrink the dcache. * The expected mechanism to shrink the cache is a registered shrinker * which is called during memory pressure. */ #ifndef HAVE_SHRINK_DCACHE_MEMORY # if defined(HAVE_SHRINK_CONTROL_STRUCT) typedef int (*shrink_dcache_memory_t)(struct shrinker *, struct shrink_control *); extern shrink_dcache_memory_t shrink_dcache_memory_fn; # define shrink_dcache_memory(nr, gfp) \ ({ \ struct shrink_control sc = { .nr_to_scan = nr, .gfp_mask = gfp }; \ int __ret__ = 0; \ \ if (shrink_dcache_memory_fn) \ __ret__ = shrink_dcache_memory_fn(NULL, &sc); \ \ __ret__; \ }) # elif defined(HAVE_3ARGS_SHRINKER_CALLBACK) typedef int (*shrink_dcache_memory_t)(struct shrinker *, int, gfp_t); extern shrink_dcache_memory_t shrink_dcache_memory_fn; # define shrink_dcache_memory(nr, gfp) \ ({ \ int __ret__ = 0; \ \ if (shrink_dcache_memory_fn) \ __ret__ = shrink_dcache_memory_fn(NULL, nr, gfp); \ \ __ret__; \ }) # else typedef int (*shrink_dcache_memory_t)(int, gfp_t); extern shrink_dcache_memory_t shrink_dcache_memory_fn; # define shrink_dcache_memory(nr, gfp) \ ({ \ int __ret__ = 0; \ \ if (shrink_dcache_memory_fn) \ __ret__ = shrink_dcache_memory_fn(nr, gfp); \ \ __ret__; \ }) # endif /* HAVE_3ARGS_SHRINKER_CALLBACK */ #endif /* HAVE_SHRINK_DCACHE_MEMORY */ /* * 2.6.xx API compat, * There currently exists no exposed API to partially shrink the icache. * The expected mechanism to shrink the cache is a registered shrinker * which is called during memory pressure. */ #ifndef HAVE_SHRINK_ICACHE_MEMORY # if defined(HAVE_SHRINK_CONTROL_STRUCT) typedef int (*shrink_icache_memory_t)(struct shrinker *, struct shrink_control *); extern shrink_icache_memory_t shrink_icache_memory_fn; # define shrink_icache_memory(nr, gfp) \ ({ \ struct shrink_control sc = { .nr_to_scan = nr, .gfp_mask = gfp }; \ int __ret__ = 0; \ \ if (shrink_icache_memory_fn) \ __ret__ = shrink_icache_memory_fn(NULL, &sc); \ \ __ret__; \ }) # elif defined(HAVE_3ARGS_SHRINKER_CALLBACK) typedef int (*shrink_icache_memory_t)(struct shrinker *, int, gfp_t); extern shrink_icache_memory_t shrink_icache_memory_fn; # define shrink_icache_memory(nr, gfp) \ ({ \ int __ret__ = 0; \ \ if (shrink_icache_memory_fn) \ __ret__ = shrink_icache_memory_fn(NULL, nr, gfp); \ \ __ret__; \ }) # else typedef int (*shrink_icache_memory_t)(int, gfp_t); extern shrink_icache_memory_t shrink_icache_memory_fn; # define shrink_icache_memory(nr, gfp) \ ({ \ int __ret__ = 0; \ \ if (shrink_icache_memory_fn) \ __ret__ = shrink_icache_memory_fn(nr, gfp); \ \ __ret__; \ }) # endif /* HAVE_3ARGS_SHRINKER_CALLBACK */ #endif /* HAVE_SHRINK_ICACHE_MEMORY */ /* * Linux 2.6. - 2.6. Shrinker API Compatibility. */ #ifdef HAVE_SET_SHRINKER typedef struct spl_shrinker { struct shrinker *shrinker; shrinker_t fn; int seeks; } spl_shrinker_t; static inline void spl_register_shrinker(spl_shrinker_t *ss) { ss->shrinker = set_shrinker(ss->seeks, ss->fn); } static inline void spl_unregister_shrinker(spl_shrinker_t *ss) { remove_shrinker(ss->shrinker); } # define SPL_SHRINKER_DECLARE(s, x, y) \ static spl_shrinker_t s = { \ .shrinker = NULL, \ .fn = x, \ .seeks = y \ } # define SPL_SHRINKER_CALLBACK_FWD_DECLARE(fn) \ static int fn(int, unsigned int) # define SPL_SHRINKER_CALLBACK_WRAPPER(fn) \ static int \ fn(int nr_to_scan, unsigned int gfp_mask) \ { \ struct shrink_control sc; \ \ sc.nr_to_scan = nr_to_scan; \ sc.gfp_mask = gfp_mask; \ \ return __ ## fn(NULL, &sc); \ } #else # define spl_register_shrinker(x) register_shrinker(x) # define spl_unregister_shrinker(x) unregister_shrinker(x) # define SPL_SHRINKER_DECLARE(s, x, y) \ static struct shrinker s = { \ .shrink = x, \ .seeks = y \ } /* * Linux 2.6. - 2.6. Shrinker API Compatibility. */ # if defined(HAVE_SHRINK_CONTROL_STRUCT) # define SPL_SHRINKER_CALLBACK_FWD_DECLARE(fn) \ static int fn(struct shrinker *, struct shrink_control *) # define SPL_SHRINKER_CALLBACK_WRAPPER(fn) \ static int \ fn(struct shrinker *shrink, struct shrink_control *sc) { \ return __ ## fn(shrink, sc); \ } /* * Linux 2.6. - 2.6. Shrinker API Compatibility. */ # elif defined(HAVE_3ARGS_SHRINKER_CALLBACK) # define SPL_SHRINKER_CALLBACK_FWD_DECLARE(fn) \ static int fn(struct shrinker *, int, unsigned int) # define SPL_SHRINKER_CALLBACK_WRAPPER(fn) \ static int \ fn(struct shrinker *shrink, int nr_to_scan, unsigned int gfp_mask) \ { \ struct shrink_control sc; \ \ sc.nr_to_scan = nr_to_scan; \ sc.gfp_mask = gfp_mask; \ \ return __ ## fn(shrink, &sc); \ } /* * Linux 2.6. - 2.6. Shrinker API Compatibility. */ # else # define SPL_SHRINKER_CALLBACK_FWD_DECLARE(fn) \ static int fn(int, unsigned int) # define SPL_SHRINKER_CALLBACK_WRAPPER(fn) \ static int \ fn(int nr_to_scan, unsigned int gfp_mask) \ { \ struct shrink_control sc; \ \ sc.nr_to_scan = nr_to_scan; \ sc.gfp_mask = gfp_mask; \ \ return __ ## fn(NULL, &sc); \ } # endif #endif /* HAVE_SET_SHRINKER */ #endif /* SPL_MM_COMPAT_H */