projects / thirdparty / linux.git / blame
| 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> | |
| 8 | ||
| 60063497 | 9 | #include <linux/atomic.h> |
| bfedb589 | 10 | #include <linux/user_namespace.h> |
| bb1f17b0 | 11 | #include <asm/pgtable.h> |
| a1b200e2 HC |
12 | #include <asm/mmu.h> |
| 13 | ||
| 14 | #ifndef INIT_MM_CONTEXT | |
| 15 | #define INIT_MM_CONTEXT(name) | |
| 16 | #endif | |
| bb1f17b0 | 17 | |
| c1a2f7f0 RR |
18 | /* |
| 19 | * For dynamically allocated mm_structs, there is a dynamically sized cpumask | |
| 20 | * at the end of the structure, the size of which depends on the maximum CPU | |
| 21 | * number the system can see. That way we allocate only as much memory for | |
| 22 | * mm_cpumask() as needed for the hundreds, or thousands of processes that | |
| 23 | * a system typically runs. | |
| 24 | * | |
| 25 | * Since there is only one init_mm in the entire system, keep it simple | |
| 26 | * and size this cpu_bitmask to NR_CPUS. | |
| 27 | */ | |
| bb1f17b0 AD |
28 | struct mm_struct init_mm = { |
| 29 | .mm_rb = RB_ROOT, | |
| 30 | .pgd = swapper_pg_dir, | |
| 31 | .mm_users = ATOMIC_INIT(2), | |
| 32 | .mm_count = ATOMIC_INIT(1), | |
| 33 | .mmap_sem = __RWSEM_INITIALIZER(init_mm.mmap_sem), | |
| 34 | .page_table_lock = __SPIN_LOCK_UNLOCKED(init_mm.page_table_lock), | |
| 88aa7cc6 | 35 | .arg_lock = __SPIN_LOCK_UNLOCKED(init_mm.arg_lock), |
| bb1f17b0 | 36 | .mmlist = LIST_HEAD_INIT(init_mm.mmlist), |
| bfedb589 | 37 | .user_ns = &init_user_ns, |
| c1a2f7f0 | 38 | .cpu_bitmap = { [BITS_TO_LONGS(NR_CPUS)] = 0}, |
| a1b200e2 | 39 | INIT_MM_CONTEXT(init_mm) |
| bb1f17b0 | 40 | }; |