linux/fs/xfs/kmem.h
Carlos Maiolino 377bcd5f3b xfs: Remove kmem_zone_free() wrapper
We can remove it now, without needing to rework the KM_ flags.

Use kmem_cache_free() directly.

Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Carlos Maiolino <cmaiolino@redhat.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-11-18 08:40:44 -08:00

101 lines
2.3 KiB
C

// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2000-2005 Silicon Graphics, Inc.
* All Rights Reserved.
*/
#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_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_NOFS|KM_MAYFAIL|KM_ZERO));
lflags = GFP_KERNEL | __GFP_NOWARN;
if (flags & KM_NOFS)
lflags &= ~__GFP_FS;
/*
* Default page/slab allocator behavior is to retry for ever
* for small allocations. We can override this behavior by using
* __GFP_RETRY_MAYFAIL which will tell the allocator to retry as long
* as it is feasible but rather fail than retry forever for all
* request sizes.
*/
if (flags & KM_MAYFAIL)
lflags |= __GFP_RETRY_MAYFAIL;
if (flags & KM_ZERO)
lflags |= __GFP_ZERO;
return lflags;
}
extern void *kmem_alloc(size_t, xfs_km_flags_t);
extern void *kmem_alloc_io(size_t size, int align_mask, xfs_km_flags_t flags);
extern void *kmem_alloc_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);
}
static inline void *
kmem_zalloc(size_t size, xfs_km_flags_t flags)
{
return kmem_alloc(size, flags | KM_ZERO);
}
static inline void *
kmem_zalloc_large(size_t size, xfs_km_flags_t flags)
{
return kmem_alloc_large(size, flags | KM_ZERO);
}
/*
* Zone interfaces
*/
#define kmem_zone kmem_cache
#define kmem_zone_t struct kmem_cache
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);
}
static inline struct page *
kmem_to_page(void *addr)
{
if (is_vmalloc_addr(addr))
return vmalloc_to_page(addr);
return virt_to_page(addr);
}
#endif /* __XFS_SUPPORT_KMEM_H__ */