Release 4.16 include/linux/mman.h
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_MMAN_H
#define _LINUX_MMAN_H
#include <linux/mm.h>
#include <linux/percpu_counter.h>
#include <linux/atomic.h>
#include <uapi/linux/mman.h>
/*
* Arrange for legacy / undefined architecture specific flags to be
* ignored by mmap handling code.
*/
#ifndef MAP_32BIT
#define MAP_32BIT 0
#endif
#ifndef MAP_HUGE_2MB
#define MAP_HUGE_2MB 0
#endif
#ifndef MAP_HUGE_1GB
#define MAP_HUGE_1GB 0
#endif
#ifndef MAP_UNINITIALIZED
#define MAP_UNINITIALIZED 0
#endif
#ifndef MAP_SYNC
#define MAP_SYNC 0
#endif
/*
* The historical set of flags that all mmap implementations implicitly
* support when a ->mmap_validate() op is not provided in file_operations.
*/
#define LEGACY_MAP_MASK (MAP_SHARED \
| MAP_PRIVATE \
| MAP_FIXED \
| MAP_ANONYMOUS \
| MAP_DENYWRITE \
| MAP_EXECUTABLE \
| MAP_UNINITIALIZED \
| MAP_GROWSDOWN \
| MAP_LOCKED \
| MAP_NORESERVE \
| MAP_POPULATE \
| MAP_NONBLOCK \
| MAP_STACK \
| MAP_HUGETLB \
| MAP_32BIT \
| MAP_HUGE_2MB \
| MAP_HUGE_1GB)
extern int sysctl_overcommit_memory;
extern int sysctl_overcommit_ratio;
extern unsigned long sysctl_overcommit_kbytes;
extern struct percpu_counter vm_committed_as;
#ifdef CONFIG_SMP
extern s32 vm_committed_as_batch;
#else
#define vm_committed_as_batch 0
#endif
unsigned long vm_memory_committed(void);
static inline void vm_acct_memory(long pages)
{
percpu_counter_add_batch(&vm_committed_as, pages, vm_committed_as_batch);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Andrew Morton | 14 | 70.00% | 1 | 25.00% |
Motohiro Kosaki | 3 | 15.00% | 1 | 25.00% |
Tim Chen | 2 | 10.00% | 1 | 25.00% |
Nikolay Borisov | 1 | 5.00% | 1 | 25.00% |
Total | 20 | 100.00% | 4 | 100.00% |
static inline void vm_unacct_memory(long pages)
{
vm_acct_memory(-pages);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Andrew Morton | 16 | 100.00% | 1 | 100.00% |
Total | 16 | 100.00% | 1 | 100.00% |
/*
* Allow architectures to handle additional protection bits
*/
#ifndef arch_calc_vm_prot_bits
#define arch_calc_vm_prot_bits(prot, pkey) 0
#endif
#ifndef arch_vm_get_page_prot
#define arch_vm_get_page_prot(vm_flags) __pgprot(0)
#endif
#ifndef arch_validate_prot
/*
* This is called from mprotect(). PROT_GROWSDOWN and PROT_GROWSUP have
* already been masked out.
*
* Returns true if the prot flags are valid
*/
static inline bool arch_validate_prot(unsigned long prot)
{
return (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC | PROT_SEM)) == 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Dave Kleikamp | 28 | 96.55% | 1 | 50.00% |
Chen Gang S | 1 | 3.45% | 1 | 50.00% |
Total | 29 | 100.00% | 2 | 100.00% |
#define arch_validate_prot arch_validate_prot
#endif
/*
* Optimisation macro. It is equivalent to:
* (x & bit1) ? bit2 : 0
* but this version is faster.
* ("bit1" and "bit2" must be single bits)
*/
#define _calc_vm_trans(x, bit1, bit2) \
((!(bit1) || !(bit2)) ? 0 : \
((bit1) <= (bit2) ? ((x) & (bit1)) * ((bit2) / (bit1)) \
: ((x) & (bit1)) / ((bit1) / (bit2))))
/*
* Combine the mmap "prot" argument into "vm_flags" used internally.
*/
static inline unsigned long
calc_vm_prot_bits(unsigned long prot, unsigned long pkey)
{
return _calc_vm_trans(prot, PROT_READ, VM_READ ) |
_calc_vm_trans(prot, PROT_WRITE, VM_WRITE) |
_calc_vm_trans(prot, PROT_EXEC, VM_EXEC) |
arch_calc_vm_prot_bits(prot, pkey);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jamie Lokier | 40 | 78.43% | 1 | 33.33% |
Dave Hansen | 6 | 11.76% | 1 | 33.33% |
Dave Kleikamp | 5 | 9.80% | 1 | 33.33% |
Total | 51 | 100.00% | 3 | 100.00% |
/*
* Combine the mmap "flags" argument into "vm_flags" used internally.
*/
static inline unsigned long
calc_vm_flag_bits(unsigned long flags)
{
return _calc_vm_trans(flags, MAP_GROWSDOWN, VM_GROWSDOWN ) |
_calc_vm_trans(flags, MAP_DENYWRITE, VM_DENYWRITE ) |
_calc_vm_trans(flags, MAP_LOCKED, VM_LOCKED ) |
_calc_vm_trans(flags, MAP_SYNC, VM_SYNC );
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jamie Lokier | 35 | 71.43% | 1 | 33.33% |
Jan Kara | 9 | 18.37% | 1 | 33.33% |
Michel Lespinasse | 5 | 10.20% | 1 | 33.33% |
Total | 49 | 100.00% | 3 | 100.00% |
unsigned long vm_commit_limit(void);
#endif /* _LINUX_MMAN_H */
Overall Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jamie Lokier | 88 | 26.11% | 1 | 4.35% |
Dave Kleikamp | 68 | 20.18% | 1 | 4.35% |
Andrew Morton | 41 | 12.17% | 4 | 17.39% |
Dan J Williams | 41 | 12.17% | 1 | 4.35% |
Jan Kara | 20 | 5.93% | 2 | 8.70% |
Tim Chen | 17 | 5.04% | 1 | 4.35% |
Jerome Marchand | 12 | 3.56% | 2 | 8.70% |
Linus Torvalds (pre-git) | 11 | 3.26% | 2 | 8.70% |
Dave Hansen | 8 | 2.37% | 1 | 4.35% |
Motohiro Kosaki | 8 | 2.37% | 1 | 4.35% |
K. Y. Srinivasan | 7 | 2.08% | 1 | 4.35% |
Michel Lespinasse | 5 | 1.48% | 1 | 4.35% |
David Howells | 4 | 1.19% | 1 | 4.35% |
David Woodhouse | 4 | 1.19% | 1 | 4.35% |
Greg Kroah-Hartman | 1 | 0.30% | 1 | 4.35% |
Chen Gang S | 1 | 0.30% | 1 | 4.35% |
Nikolay Borisov | 1 | 0.30% | 1 | 4.35% |
Total | 337 | 100.00% | 23 | 100.00% |
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.