Contributors: 47
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Nicholas Piggin |
214 |
17.73% |
6 |
7.06% |
| Christoph Hellwig |
96 |
7.95% |
7 |
8.24% |
| Linus Torvalds (pre-git) |
83 |
6.88% |
7 |
8.24% |
| Kees Cook |
58 |
4.81% |
2 |
2.35% |
| Tejun Heo |
56 |
4.64% |
4 |
4.71% |
| Graf Yang |
56 |
4.64% |
1 |
1.18% |
| Christophe Leroy |
50 |
4.14% |
2 |
2.35% |
| Rick Edgecombe |
48 |
3.98% |
2 |
2.35% |
| Andrey Ryabinin |
40 |
3.31% |
4 |
4.71% |
| Christoph Lameter |
38 |
3.15% |
3 |
3.53% |
| Paul E. McKenney |
37 |
3.07% |
2 |
2.35% |
| Atsushi Kumagai |
35 |
2.90% |
1 |
1.18% |
| Benjamin Herrenschmidt |
33 |
2.73% |
2 |
2.35% |
| Kefeng Wang |
33 |
2.73% |
1 |
1.18% |
| Chris Wilson |
25 |
2.07% |
2 |
2.35% |
| David Rientjes |
23 |
1.91% |
1 |
1.18% |
| Joerg Roedel |
23 |
1.91% |
1 |
1.18% |
| Daisuke Hatayama |
22 |
1.82% |
1 |
1.18% |
| Yang Ruirui |
21 |
1.74% |
1 |
1.18% |
| Jeremy Fitzhardinge |
21 |
1.74% |
1 |
1.18% |
| Roman Gushchin |
21 |
1.74% |
1 |
1.18% |
| Motohiro Kosaki |
17 |
1.41% |
1 |
1.18% |
| JoonSoo Kim |
17 |
1.41% |
2 |
2.35% |
| Marek Szyprowski |
16 |
1.33% |
2 |
2.35% |
| Andrew Morton |
15 |
1.24% |
2 |
2.35% |
| Michal Hocko |
14 |
1.16% |
2 |
2.35% |
| Nico Pitre |
13 |
1.08% |
2 |
2.35% |
| Andi Kleen |
11 |
0.91% |
2 |
2.35% |
| Deepak Saxena |
10 |
0.83% |
1 |
1.18% |
| Oleg Nesterov |
10 |
0.83% |
1 |
1.18% |
| Pengfei Li |
9 |
0.75% |
1 |
1.18% |
| Claudio Imbrenda |
8 |
0.66% |
1 |
1.18% |
| Eric Dumazet |
5 |
0.41% |
1 |
1.18% |
| Ingo Molnar |
4 |
0.33% |
2 |
2.35% |
| Jann Horn |
4 |
0.33% |
1 |
1.18% |
| Rusty Russell |
4 |
0.33% |
1 |
1.18% |
| Mitsuo Hayasaka |
3 |
0.25% |
1 |
1.18% |
| Zhang Yanfei |
2 |
0.17% |
1 |
1.18% |
| Zhen Lei |
2 |
0.17% |
1 |
1.18% |
| Hugh Dickins |
2 |
0.17% |
1 |
1.18% |
| Al Viro |
2 |
0.17% |
1 |
1.18% |
| Uladzislau Rezki |
1 |
0.08% |
1 |
1.18% |
| Kenji Kaneshige |
1 |
0.08% |
1 |
1.18% |
| David Hildenbrand |
1 |
0.08% |
1 |
1.18% |
| Tom Rini |
1 |
0.08% |
1 |
1.18% |
| Peter Zijlstra |
1 |
0.08% |
1 |
1.18% |
| Greg Kroah-Hartman |
1 |
0.08% |
1 |
1.18% |
| Total |
1207 |
|
85 |
|
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_VMALLOC_H
#define _LINUX_VMALLOC_H
#include <linux/spinlock.h>
#include <linux/init.h>
#include <linux/list.h>
#include <linux/llist.h>
#include <asm/page.h> /* pgprot_t */
#include <linux/rbtree.h>
#include <linux/overflow.h>
#include <asm/vmalloc.h>
struct vm_area_struct; /* vma defining user mapping in mm_types.h */
struct notifier_block; /* in notifier.h */
/* bits in flags of vmalloc's vm_struct below */
#define VM_IOREMAP 0x00000001 /* ioremap() and friends */
#define VM_ALLOC 0x00000002 /* vmalloc() */
#define VM_MAP 0x00000004 /* vmap()ed pages */
#define VM_USERMAP 0x00000008 /* suitable for remap_vmalloc_range */
#define VM_DMA_COHERENT 0x00000010 /* dma_alloc_coherent */
#define VM_UNINITIALIZED 0x00000020 /* vm_struct is not fully initialized */
#define VM_NO_GUARD 0x00000040 /* ***DANGEROUS*** don't add guard page */
#define VM_KASAN 0x00000080 /* has allocated kasan shadow memory */
#define VM_FLUSH_RESET_PERMS 0x00000100 /* reset direct map and flush TLB on unmap, can't be freed in atomic context */
#define VM_MAP_PUT_PAGES 0x00000200 /* put pages and free array in vfree */
#define VM_NO_HUGE_VMAP 0x00000400 /* force PAGE_SIZE pte mapping */
#if (defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS)) && \
!defined(CONFIG_KASAN_VMALLOC)
#define VM_DEFER_KMEMLEAK 0x00000800 /* defer kmemleak object creation */
#else
#define VM_DEFER_KMEMLEAK 0
#endif
/*
* VM_KASAN is used slightly differently depending on CONFIG_KASAN_VMALLOC.
*
* If IS_ENABLED(CONFIG_KASAN_VMALLOC), VM_KASAN is set on a vm_struct after
* shadow memory has been mapped. It's used to handle allocation errors so that
* we don't try to poison shadow on free if it was never allocated.
*
* Otherwise, VM_KASAN is set for kasan_module_alloc() allocations and used to
* determine which allocations need the module shadow freed.
*/
/* bits [20..32] reserved for arch specific ioremap internals */
/*
* Maximum alignment for ioremap() regions.
* Can be overridden by arch-specific value.
*/
#ifndef IOREMAP_MAX_ORDER
#define IOREMAP_MAX_ORDER (7 + PAGE_SHIFT) /* 128 pages */
#endif
struct vm_struct {
struct vm_struct *next;
void *addr;
unsigned long size;
unsigned long flags;
struct page **pages;
#ifdef CONFIG_HAVE_ARCH_HUGE_VMALLOC
unsigned int page_order;
#endif
unsigned int nr_pages;
phys_addr_t phys_addr;
const void *caller;
};
struct vmap_area {
unsigned long va_start;
unsigned long va_end;
struct rb_node rb_node; /* address sorted rbtree */
struct list_head list; /* address sorted list */
/*
* The following two variables can be packed, because
* a vmap_area object can be either:
* 1) in "free" tree (root is vmap_area_root)
* 2) or "busy" tree (root is free_vmap_area_root)
*/
union {
unsigned long subtree_max_size; /* in "free" tree */
struct vm_struct *vm; /* in "busy" tree */
};
};
/* archs that select HAVE_ARCH_HUGE_VMAP should override one or more of these */
#ifndef arch_vmap_p4d_supported
static inline bool arch_vmap_p4d_supported(pgprot_t prot)
{
return false;
}
#endif
#ifndef arch_vmap_pud_supported
static inline bool arch_vmap_pud_supported(pgprot_t prot)
{
return false;
}
#endif
#ifndef arch_vmap_pmd_supported
static inline bool arch_vmap_pmd_supported(pgprot_t prot)
{
return false;
}
#endif
#ifndef arch_vmap_pte_range_map_size
static inline unsigned long arch_vmap_pte_range_map_size(unsigned long addr, unsigned long end,
u64 pfn, unsigned int max_page_shift)
{
return PAGE_SIZE;
}
#endif
#ifndef arch_vmap_pte_supported_shift
static inline int arch_vmap_pte_supported_shift(unsigned long size)
{
return PAGE_SHIFT;
}
#endif
/*
* Highlevel APIs for driver use
*/
extern void vm_unmap_ram(const void *mem, unsigned int count);
extern void *vm_map_ram(struct page **pages, unsigned int count, int node);
extern void vm_unmap_aliases(void);
#ifdef CONFIG_MMU
extern void __init vmalloc_init(void);
extern unsigned long vmalloc_nr_pages(void);
#else
static inline void vmalloc_init(void)
{
}
static inline unsigned long vmalloc_nr_pages(void) { return 0; }
#endif
extern void *vmalloc(unsigned long size) __alloc_size(1);
extern void *vzalloc(unsigned long size) __alloc_size(1);
extern void *vmalloc_user(unsigned long size) __alloc_size(1);
extern void *vmalloc_node(unsigned long size, int node) __alloc_size(1);
extern void *vzalloc_node(unsigned long size, int node) __alloc_size(1);
extern void *vmalloc_32(unsigned long size) __alloc_size(1);
extern void *vmalloc_32_user(unsigned long size) __alloc_size(1);
extern void *__vmalloc(unsigned long size, gfp_t gfp_mask) __alloc_size(1);
extern void *__vmalloc_node_range(unsigned long size, unsigned long align,
unsigned long start, unsigned long end, gfp_t gfp_mask,
pgprot_t prot, unsigned long vm_flags, int node,
const void *caller) __alloc_size(1);
void *__vmalloc_node(unsigned long size, unsigned long align, gfp_t gfp_mask,
int node, const void *caller) __alloc_size(1);
void *vmalloc_no_huge(unsigned long size) __alloc_size(1);
extern void vfree(const void *addr);
extern void vfree_atomic(const void *addr);
extern void *vmap(struct page **pages, unsigned int count,
unsigned long flags, pgprot_t prot);
void *vmap_pfn(unsigned long *pfns, unsigned int count, pgprot_t prot);
extern void vunmap(const void *addr);
extern int remap_vmalloc_range_partial(struct vm_area_struct *vma,
unsigned long uaddr, void *kaddr,
unsigned long pgoff, unsigned long size);
extern int remap_vmalloc_range(struct vm_area_struct *vma, void *addr,
unsigned long pgoff);
/*
* Architectures can set this mask to a combination of PGTBL_P?D_MODIFIED values
* and let generic vmalloc and ioremap code know when arch_sync_kernel_mappings()
* needs to be called.
*/
#ifndef ARCH_PAGE_TABLE_SYNC_MASK
#define ARCH_PAGE_TABLE_SYNC_MASK 0
#endif
/*
* There is no default implementation for arch_sync_kernel_mappings(). It is
* relied upon the compiler to optimize calls out if ARCH_PAGE_TABLE_SYNC_MASK
* is 0.
*/
void arch_sync_kernel_mappings(unsigned long start, unsigned long end);
/*
* Lowlevel-APIs (not for driver use!)
*/
static inline size_t get_vm_area_size(const struct vm_struct *area)
{
if (!(area->flags & VM_NO_GUARD))
/* return actual size without guard page */
return area->size - PAGE_SIZE;
else
return area->size;
}
extern struct vm_struct *get_vm_area(unsigned long size, unsigned long flags);
extern struct vm_struct *get_vm_area_caller(unsigned long size,
unsigned long flags, const void *caller);
extern struct vm_struct *__get_vm_area_caller(unsigned long size,
unsigned long flags,
unsigned long start, unsigned long end,
const void *caller);
void free_vm_area(struct vm_struct *area);
extern struct vm_struct *remove_vm_area(const void *addr);
extern struct vm_struct *find_vm_area(const void *addr);
static inline bool is_vm_area_hugepages(const void *addr)
{
/*
* This may not 100% tell if the area is mapped with > PAGE_SIZE
* page table entries, if for some reason the architecture indicates
* larger sizes are available but decides not to use them, nothing
* prevents that. This only indicates the size of the physical page
* allocated in the vmalloc layer.
*/
#ifdef CONFIG_HAVE_ARCH_HUGE_VMALLOC
return find_vm_area(addr)->page_order > 0;
#else
return false;
#endif
}
#ifdef CONFIG_MMU
void vunmap_range(unsigned long addr, unsigned long end);
static inline void set_vm_flush_reset_perms(void *addr)
{
struct vm_struct *vm = find_vm_area(addr);
if (vm)
vm->flags |= VM_FLUSH_RESET_PERMS;
}
#else
static inline void set_vm_flush_reset_perms(void *addr)
{
}
#endif
/* for /proc/kcore */
extern long vread(char *buf, char *addr, unsigned long count);
/*
* Internals. Don't use..
*/
extern struct list_head vmap_area_list;
extern __init void vm_area_add_early(struct vm_struct *vm);
extern __init void vm_area_register_early(struct vm_struct *vm, size_t align);
#ifdef CONFIG_SMP
# ifdef CONFIG_MMU
struct vm_struct **pcpu_get_vm_areas(const unsigned long *offsets,
const size_t *sizes, int nr_vms,
size_t align);
void pcpu_free_vm_areas(struct vm_struct **vms, int nr_vms);
# else
static inline struct vm_struct **
pcpu_get_vm_areas(const unsigned long *offsets,
const size_t *sizes, int nr_vms,
size_t align)
{
return NULL;
}
static inline void
pcpu_free_vm_areas(struct vm_struct **vms, int nr_vms)
{
}
# endif
#endif
#ifdef CONFIG_MMU
#define VMALLOC_TOTAL (VMALLOC_END - VMALLOC_START)
#else
#define VMALLOC_TOTAL 0UL
#endif
int register_vmap_purge_notifier(struct notifier_block *nb);
int unregister_vmap_purge_notifier(struct notifier_block *nb);
#if defined(CONFIG_MMU) && defined(CONFIG_PRINTK)
bool vmalloc_dump_obj(void *object);
#else
static inline bool vmalloc_dump_obj(void *object) { return false; }
#endif
#endif /* _LINUX_VMALLOC_H */