Release 4.14 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>
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) ? ((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 );
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jamie Lokier | 35 | 87.50% | 1 | 50.00% |
| Michel Lespinasse | 5 | 12.50% | 1 | 50.00% |
| Total | 40 | 100.00% | 2 | 100.00% |
unsigned long vm_commit_limit(void);
#endif /* _LINUX_MMAN_H */
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jamie Lokier | 89 | 32.13% | 1 | 5.00% |
| Dave Kleikamp | 68 | 24.55% | 1 | 5.00% |
| Andrew Morton | 41 | 14.80% | 4 | 20.00% |
| Tim Chen | 17 | 6.14% | 1 | 5.00% |
| Jerome Marchand | 12 | 4.33% | 2 | 10.00% |
| Linus Torvalds (pre-git) | 11 | 3.97% | 2 | 10.00% |
| Motohiro Kosaki | 8 | 2.89% | 1 | 5.00% |
| Dave Hansen | 8 | 2.89% | 1 | 5.00% |
| K. Y. Srinivasan | 7 | 2.53% | 1 | 5.00% |
| Michel Lespinasse | 5 | 1.81% | 1 | 5.00% |
| David Woodhouse | 4 | 1.44% | 1 | 5.00% |
| David Howells | 4 | 1.44% | 1 | 5.00% |
| Nikolay Borisov | 1 | 0.36% | 1 | 5.00% |
| Chen Gang S | 1 | 0.36% | 1 | 5.00% |
| Greg Kroah-Hartman | 1 | 0.36% | 1 | 5.00% |
| Total | 277 | 100.00% | 20 | 100.00% |
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