cregit-Linux how code gets into the kernel

Release 4.10 fs/xfs/kmem.h

Directory: fs/xfs
/*
 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
 * All Rights Reserved.
 *
 * 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.
 *
 * This program is distributed in the hope that it would 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, write the Free Software Foundation,
 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
#ifndef __XFS_SUPPORT_KMEM_H__

#define __XFS_SUPPORT_KMEM_H__

#include <linux/slab.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/vmalloc.h>

/*
 * General memory allocation interfaces
 */


typedef unsigned __bitwise xfs_km_flags_t;

#define KM_SLEEP	((__force xfs_km_flags_t)0x0001u)

#define KM_NOSLEEP	((__force xfs_km_flags_t)0x0002u)

#define KM_NOFS		((__force xfs_km_flags_t)0x0004u)

#define KM_MAYFAIL	((__force xfs_km_flags_t)0x0008u)

#define KM_ZERO		((__force xfs_km_flags_t)0x0010u)

/*
 * We use a special process flag to avoid recursive callbacks into
 * the filesystem during transactions.  We will also issue our own
 * warnings, so we explicitly skip any generic ones (silly of us).
 */

static inline gfp_t kmem_flags_convert(xfs_km_flags_t flags) { gfp_t lflags; BUG_ON(flags & ~(KM_SLEEP|KM_NOSLEEP|KM_NOFS|KM_MAYFAIL|KM_ZERO)); if (flags & KM_NOSLEEP) { lflags = GFP_ATOMIC | __GFP_NOWARN; } else { lflags = GFP_KERNEL | __GFP_NOWARN; if ((current->flags & PF_FSTRANS) || (flags & KM_NOFS)) lflags &= ~__GFP_FS; } if (flags & KM_ZERO) lflags |= __GFP_ZERO; return lflags; }

Contributors

PersonTokensPropCommitsCommitProp
nathan scottnathan scott3438.64%440.00%
christoph hellwigchristoph hellwig2326.14%220.00%
stephen lordstephen lord1618.18%110.00%
gu zhenggu zheng1213.64%110.00%
al viroal viro33.41%220.00%
Total88100.00%10100.00%

extern void *kmem_alloc(size_t, xfs_km_flags_t); extern void *kmem_zalloc_large(size_t size, xfs_km_flags_t); extern void *kmem_realloc(const void *, size_t, xfs_km_flags_t);
static inline void kmem_free(const void *ptr) { kvfree(ptr); }

Contributors

PersonTokensPropCommitsCommitProp
yalin wangyalin wang1058.82%120.00%
nathan scottnathan scott529.41%240.00%
barry naujokbarry naujok15.88%120.00%
christoph hellwigchristoph hellwig15.88%120.00%
Total17100.00%5100.00%

extern void *kmem_zalloc_greedy(size_t *, size_t, size_t);
static inline void * kmem_zalloc(size_t size, xfs_km_flags_t flags) { return kmem_alloc(size, flags | KM_ZERO); }

Contributors

PersonTokensPropCommitsCommitProp
gu zhenggu zheng24100.00%1100.00%
Total24100.00%1100.00%

/* * Zone interfaces */ #define KM_ZONE_HWALIGN SLAB_HWCACHE_ALIGN #define KM_ZONE_RECLAIM SLAB_RECLAIM_ACCOUNT #define KM_ZONE_SPREAD SLAB_MEM_SPREAD #define KM_ZONE_ACCOUNT SLAB_ACCOUNT #define kmem_zone kmem_cache #define kmem_zone_t struct kmem_cache
static inline kmem_zone_t * kmem_zone_init(int size, char *zone_name) { return kmem_cache_create(zone_name, size, 0, 0, NULL); }

Contributors

PersonTokensPropCommitsCommitProp
christoph hellwigchristoph hellwig1862.07%250.00%
nathan scottnathan scott1137.93%250.00%
Total29100.00%4100.00%


static inline kmem_zone_t * kmem_zone_init_flags(int size, char *zone_name, unsigned long flags, void (*construct)(void *)) { return kmem_cache_create(zone_name, size, 0, flags, construct); }

Contributors

PersonTokensPropCommitsCommitProp
nathan scottnathan scott4093.02%133.33%
christoph lameterchristoph lameter24.65%133.33%
christoph hellwigchristoph hellwig12.33%133.33%
Total43100.00%3100.00%


static inline void kmem_zone_free(kmem_zone_t *zone, void *ptr) { kmem_cache_free(zone, ptr); }

Contributors

PersonTokensPropCommitsCommitProp
christoph hellwigchristoph hellwig1254.55%250.00%
nathan scottnathan scott1045.45%250.00%
Total22100.00%4100.00%


static inline void kmem_zone_destroy(kmem_zone_t *zone) { if (zone) kmem_cache_destroy(zone); }

Contributors

PersonTokensPropCommitsCommitProp
christoph hellwigchristoph hellwig1260.00%240.00%
nathan scottnathan scott735.00%240.00%
alexey dobriyanalexey dobriyan15.00%120.00%
Total20100.00%5100.00%

extern void *kmem_zone_alloc(kmem_zone_t *, xfs_km_flags_t);
static inline void * kmem_zone_zalloc(kmem_zone_t *zone, xfs_km_flags_t flags) { return kmem_zone_alloc(zone, flags | KM_ZERO); }

Contributors

PersonTokensPropCommitsCommitProp
gu zhenggu zheng1664.00%116.67%
christoph hellwigchristoph hellwig520.00%233.33%
nathan scottnathan scott312.00%233.33%
al viroal viro14.00%116.67%
Total25100.00%6100.00%

#endif /* __XFS_SUPPORT_KMEM_H__ */

Overall Contributors

PersonTokensPropCommitsCommitProp
nathan scottnathan scott17643.89%733.33%
christoph hellwigchristoph hellwig10726.68%314.29%
gu zhenggu zheng5613.97%14.76%
al viroal viro163.99%29.52%
stephen lordstephen lord163.99%14.76%
dave chinnerdave chinner112.74%14.76%
yalin wangyalin wang102.49%14.76%
vladimir davydovvladimir davydov41.00%14.76%
christoph lameterchristoph lameter20.50%14.76%
barry naujokbarry naujok10.25%14.76%
paul jacksonpaul jackson10.25%14.76%
alexey dobriyanalexey dobriyan10.25%14.76%
Total401100.00%21100.00%
Directory: fs/xfs
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