Commit | Line | Data |
---|---|---|
b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
bb1f17b0 AD |
2 | #include <linux/mm_types.h> |
3 | #include <linux/rbtree.h> | |
4 | #include <linux/rwsem.h> | |
5 | #include <linux/spinlock.h> | |
6 | #include <linux/list.h> | |
7 | #include <linux/cpumask.h> | |
a2ae8c05 | 8 | #include <linux/mman.h> |
65fddcfc | 9 | #include <linux/pgtable.h> |
bb1f17b0 | 10 | |
60063497 | 11 | #include <linux/atomic.h> |
bfedb589 | 12 | #include <linux/user_namespace.h> |
a1b200e2 HC |
13 | #include <asm/mmu.h> |
14 | ||
15 | #ifndef INIT_MM_CONTEXT | |
16 | #define INIT_MM_CONTEXT(name) | |
17 | #endif | |
bb1f17b0 | 18 | |
c1a2f7f0 RR |
19 | /* |
20 | * For dynamically allocated mm_structs, there is a dynamically sized cpumask | |
21 | * at the end of the structure, the size of which depends on the maximum CPU | |
22 | * number the system can see. That way we allocate only as much memory for | |
23 | * mm_cpumask() as needed for the hundreds, or thousands of processes that | |
24 | * a system typically runs. | |
25 | * | |
26 | * Since there is only one init_mm in the entire system, keep it simple | |
27 | * and size this cpu_bitmask to NR_CPUS. | |
28 | */ | |
bb1f17b0 AD |
29 | struct mm_struct init_mm = { |
30 | .mm_rb = RB_ROOT, | |
31 | .pgd = swapper_pg_dir, | |
32 | .mm_users = ATOMIC_INIT(2), | |
33 | .mm_count = ATOMIC_INIT(1), | |
14c3656b | 34 | MMAP_LOCK_INITIALIZER(init_mm) |
bb1f17b0 | 35 | .page_table_lock = __SPIN_LOCK_UNLOCKED(init_mm.page_table_lock), |
88aa7cc6 | 36 | .arg_lock = __SPIN_LOCK_UNLOCKED(init_mm.arg_lock), |
bb1f17b0 | 37 | .mmlist = LIST_HEAD_INIT(init_mm.mmlist), |
bfedb589 | 38 | .user_ns = &init_user_ns, |
2286bf4e | 39 | .cpu_bitmap = CPU_BITS_NONE, |
a1b200e2 | 40 | INIT_MM_CONTEXT(init_mm) |
bb1f17b0 | 41 | }; |