/* SPDX-License-Identifier: GPL-2.0+ */
/*
* vma_internal.h
*
* Header providing userland wrappers and shims for the functionality provided
* by mm/vma_internal.h.
*
* We make the header guard the same as mm/vma_internal.h, so if this shim
* header is included, it precludes the inclusion of the kernel one.
*/
#ifndef __MM_VMA_INTERNAL_H
#define __MM_VMA_INTERNAL_H
#define __private
#define __bitwise
#define __randomize_layout
#define CONFIG_MMU
#define CONFIG_PER_VMA_LOCK
#include <stdlib.h>
#include <linux/list.h>
#include <linux/maple_tree.h>
#include <linux/mm.h>
#include <linux/rbtree.h>
#include <linux/rwsem.h>
#define VM_WARN_ON(_expr) (WARN_ON(_expr))
#define VM_WARN_ON_ONCE(_expr) (WARN_ON_ONCE(_expr))
#define VM_BUG_ON(_expr) (BUG_ON(_expr))
#define VM_BUG_ON_VMA(_expr, _vma) (BUG_ON(_expr))
#define VM_NONE 0x00000000
#define VM_READ 0x00000001
#define VM_WRITE 0x00000002
#define VM_EXEC 0x00000004
#define VM_SHARED 0x00000008
#define VM_MAYREAD 0x00000010
#define VM_MAYWRITE 0x00000020
#define VM_GROWSDOWN 0x00000100
#define VM_PFNMAP 0x00000400
#define VM_LOCKED 0x00002000
#define VM_IO 0x00004000
#define VM_DONTEXPAND 0x00040000
#define VM_ACCOUNT 0x00100000
#define VM_MIXEDMAP 0x10000000
#define VM_STACK VM_GROWSDOWN
#define VM_SHADOW_STACK VM_NONE
#define VM_SOFTDIRTY 0
#define VM_ACCESS_FLAGS (VM_READ | VM_WRITE | VM_EXEC)
#define VM_SPECIAL (VM_IO | VM_DONTEXPAND | VM_PFNMAP | VM_MIXEDMAP)
#define FIRST_USER_ADDRESS 0UL
#define USER_PGTABLES_CEILING 0UL
#define vma_policy(vma) NULL
#define down_write_nest_lock(sem, nest_lock)
#define pgprot_val(x) ((x).pgprot)
#define __pgprot(x) ((pgprot_t) { (x) } )
#define for_each_vma(__vmi, __vma) \
while (((__vma) = vma_next(&(__vmi))) != NULL)
/* The MM code likes to work with exclusive end addresses */
#define for_each_vma_range(__vmi, __vma, __end) \
while (((__vma) = vma_find(&(__vmi), (__end))) != NULL)
#define offset_in_page(p) ((unsigned long)(p) & ~PAGE_MASK)
#define PHYS_PFN(x) ((unsigned long)((x) >> PAGE_SHIFT))
#define test_and_set_bit(nr, addr) __test_and_set_bit(nr, addr)
#define test_and_clear_bit(nr, addr) __test_and_clear_bit(nr, addr)
#define TASK_SIZE ((1ul << 47)-PAGE_SIZE)
#define AS_MM_ALL_LOCKS 2
/* We hardcode this for now. */
#define sysctl_max_map_count 0x1000000UL
#define pgoff_t unsigned long
typedef unsigned long pgprotval_t;
typedef struct pgprot { pgprotval_t pgprot; } pgprot_t;
typedef unsigned long vm_flags_t;
typedef __bitwise unsigned int vm_fault_t;
/*
* The shared stubs do not implement this, it amounts to an fprintf(STDERR,...)
* either way :)
*/
#define pr_warn_once pr_err
typedef struct refcount_struct {
atomic_t refs;
} refcount_t;
struct kref {
refcount_t refcount;
};
/*
* Define the task command name length as enum, then it can be visible to
* BPF programs.
*/
enum {
TASK_COMM_LEN = 16,
};
struct task_struct {
char comm[TASK_COMM_LEN];
pid_t pid;
struct mm_struct *mm;
};
struct task_struct *get_current(void);
#define current get_current()
struct anon_vma {
struct anon_vma *root;
struct rb_root_cached rb_root;
/* Test fields. */
bool was_cloned;
bool was_unlinked;
};
struct anon_vma_chain {
struct anon_vma *anon_vma;
struct list_head same_vma;
};
struct anon_vma_name {
struct kref kref;
/* The name needs to be at the end because it is dynamically sized. */
char name[];
};
struct vma_iterator {
struct ma_state mas;
};
#define VMA_ITERATOR(name, __mm, __addr) \
struct vma_iterator name = { \
.mas = { \
.tree = &(__mm)->mm_mt, \
.index = __addr, \
.node = NULL, \
.status = ma_start, \
}, \
}
struct address_space {
struct rb_root_cached i_mmap;
unsigned long flags;
atomic_t i_mmap_writable;
};
struct vm_userfaultfd_ctx {};
struct mempolicy {};
struct mmu_gather {};
struct mutex {};
#define DEFINE_MUTEX(mutexname) \
struct mutex mutexname = {}
struct mm_struct {
struct maple_tree mm_mt;
int map_count; /* number of VMAs */
unsigned long total_vm; /* Total pages mapped */
unsigned long locked_vm; /* Pages that have PG_mlocked set */
unsigned long data_vm; /* VM_WRITE & ~VM_SHARED & ~VM_STACK */
unsigned long exec_vm; /* VM_EXEC & ~VM_WRITE & ~VM_STACK */
unsigned long stack_vm; /* VM_STACK */
};
struct vma_lock {
struct rw_semaphore lock;
};
struct file {
struct address_space *f_mapping;
};
struct vm_area_struct {
/* The first cache line has the info for VMA tree walking. */
union {
struct {
/* VMA covers [vm_start; vm_end) addresses within mm */
unsigned long vm_start;
unsigned long vm_end;
};
#ifdef CONFIG_PER_VMA_LOCK
struct rcu_head vm_rcu; /* Used for deferred freeing. */
#endif
};
struct mm_struct *vm_mm; /* The address space we belong to. */
pgprot_t vm_page_prot; /* Access permissions of this VMA. */
/*
* Flags, see mm.h.
* To modify use vm_flags_{init|reset|set|clear|mod} functions.
*/
union {
const vm_flags_t vm_flags;
vm_flags_t __private __vm_flags;
};
#ifdef CONFIG_PER_VMA_LOCK
/* Flag to indicate areas detached from the mm->mm_mt tree */
bool detached;
/*
* Can only be written (using WRITE_ONCE()) while holding both:
* - mmap_lock (in write mode)
* - vm_lock->lock (in write mode)
* Can be read reliably while holding one of:
* - mmap_lock (in read or write mode)
* - vm_lock->lock (in read or write mode)
* Can be read unreliably (using READ_ONCE()) for pessimistic bailout
* while holding nothing (except RCU to keep the VMA struct allocated).
*
* This sequence counter is explicitly allowed to overflow; sequence
* counter reuse can only lead to occasional unnecessary use of the
* slowpath.
*/
int vm_lock_seq;
struct vma_lock *vm_lock;
#endif
/*
* For areas with an address space and backing store,
* linkage into the address_space->i_mmap interval tree.
*
*/
struct {
struct rb_node rb;
unsigned long rb_subtree_last;
} shared;
/*
* A file's MAP_PRIVATE vma can be in both i_mmap tree and anon_vma
* list, after a COW of one of the file pages. A MAP_SHARED vma
* can only be in the i_mmap tree. An anonymous MAP_PRIVATE, stack
* or brk vma (with NULL file) can only be in an anon_vma list.
*/
struct list_head anon_vma_chain; /* Serialized by mmap_lock &
* page_table_lock */
struct anon_vma *anon_vma; /* Serialized by page_table_lock */
/* Function pointers to deal with this struct. */
const struct vm_operations_struct *vm_ops;
/* Information about our backing store: */
unsigned long vm_pgoff; /* Offset (within vm_file) in PAGE_SIZE
units */
struct file * vm_file; /* File we map to (can be NULL). */
void * vm_private_data; /* was vm_pte (shared mem) */
#ifdef CONFIG_ANON_VMA_NAME
/*
* For private and shared anonymous mappings, a pointer to a null
* terminated string containing the name given to the vma, or NULL if
* unnamed. Serialized by mmap_lock. Use anon_vma_name to access.
*/
struct anon_vma_name *anon_name;
#endif
#ifdef CONFIG_SWAP
atomic_long_t swap_readahead_info;
#endif
#ifndef CONFIG_MMU
struct vm_region *vm_region; /* NOMMU mapping region */
#endif
#ifdef CONFIG_NUMA
struct mempolicy *vm_policy; /* NUMA policy for the VMA */
#endif
#ifdef CONFIG_NUMA_BALANCING
struct vma_numab_state *numab_state; /* NUMA Balancing state */
#endif
struct vm_userfaultfd_ctx vm_userfaultfd_ctx;
} __randomize_layout;
struct vm_fault {};
struct vm_operations_struct {
void (*open)(struct vm_area_struct * area);
/**
* @close: Called when the VMA is being removed from the MM.
* Context: User context. May sleep. Caller holds mmap_lock.
*/
void (*close)(struct vm_area_struct * area);
/* Called any time before splitting to check if it's allowed */
int (*may_split)(struct vm_area_struct *area, unsigned long addr);
int (*mremap)(struct vm_area_struct *area);
/*
* Called by mprotect() to make driver-specific permission
* checks before mprotect() is finalised. The VMA must not
* be modified. Returns 0 if mprotect() can proceed.
*/
int (*mprotect)(struct vm_area_struct *vma, unsigned long start,
unsigned long end, unsigned long newflags);
vm_fault_t (*fault)(struct vm_fault *vmf);
vm_fault_t (*huge_fault)(struct vm_fault *vmf, unsigned int order);
vm_fault_t (*map_pages)(struct vm_fault *vmf,
pgoff_t start_pgoff, pgoff_t end_pgoff);
unsigned long (*pagesize)(struct vm_area_struct * area);
/* notification that a previously read-only page is about to become
* writable, if an error is returned it will cause a SIGBUS */
vm_fault_t (*page_mkwrite)(struct vm_fault *vmf);
/* same as page_mkwrite when using VM_PFNMAP|VM_MIXEDMAP */
vm_fault_t (*pfn_mkwrite)(struct vm_fault *vmf);
/* called by access_process_vm when get_user_pages() fails, typically
* for use by special VMAs. See also generic_access_phys() for a generic
* implementation useful for any iomem mapping.
*/
int (*access)(struct vm_area_struct *vma, unsigned long addr,
void *buf, int len, int write);
/* Called by the /proc/PID/maps code to ask the vma whether it
* has a special name. Returning non-NULL will also cause this
* vma to be dumped unconditionally. */
const char *(*name)(struct vm_area_struct *vma);
#ifdef CONFIG_NUMA
/*
* set_policy() op must add a reference to any non-NULL @new mempolicy
* to hold the policy upon return. Caller should pass NULL @new to
* remove a policy and fall back to surrounding context--i.e. do not
* install a MPOL_DEFAULT policy, nor the task or system default
* mempolicy.
*/
int (*set_policy)(struct vm_area_struct *vma, struct mempolicy *new);
/*
* get_policy() op must add reference [mpol_get()] to any policy at
* (vma,addr) marked as MPOL_SHARED. The shared policy infrastructure
* in mm/mempolicy.c will do this automatically.
* get_policy() must NOT add a ref if the policy at (vma,addr) is not
* marked as MPOL_SHARED. vma policies are protected by the mmap_lock.
* If no [shared/vma] mempolicy exists at the addr, get_policy() op
* must return NULL--i.e., do not "fallback" to task or system default
* policy.
*/
struct mempolicy *(*get_policy)(struct vm_area_struct *vma,
unsigned long addr, pgoff_t *ilx);
#endif
/*
* Called by vm_normal_page() for special PTEs to find the
* page for @addr. This is useful if the default behavior
* (using pte_page()) would not find the correct page.
*/
struct page *(*find_special_page)(struct vm_area_struct *vma,
unsigned long addr);
};
static inline void vma_iter_invalidate(struct vma_iterator *vmi)
{
mas_pause(&vmi->mas);
}
static inline pgprot_t pgprot_modify(pgprot_t oldprot, pgprot_t newprot)
{
return __pgprot(pgprot_val(oldprot) | pgprot_val(newprot));
}
static inline pgprot_t vm_get_page_prot(unsigned long vm_flags)
{
return __pgprot(vm_flags);
}
static inline bool is_shared_maywrite(vm_flags_t vm_flags)
{
return (vm_flags & (VM_SHARED | VM_MAYWRITE)) ==
(VM_SHARED | VM_MAYWRITE);
}
static inline bool vma_is_shared_maywrite(struct vm_area_struct *vma)
{
return is_shared_maywrite(vma->vm_flags);
}
static inline struct vm_area_struct *vma_next(struct vma_iterator *vmi)
{
/*
* Uses mas_find() to get the first VMA when the iterator starts.
* Calling mas_next() could skip the first entry.
*/
return mas_find(&vmi->mas, ULONG_MAX);
}
static inline bool vma_lock_alloc(struct vm_area_struct *vma)
{
vma->vm_lock = calloc(1, sizeof(struct vma_lock));
if (!vma->vm_lock)
return false;
init_rwsem(&vma->vm_lock->lock);
vma->vm_lock_seq = -1;
return true;
}
static inline void vma_assert_write_locked(struct vm_area_struct *);
static inline void vma_mark_detached(struct vm_area_struct *vma, bool detached)
{
/* When detaching vma should be write-locked */
if (detached)
vma_assert_write_locked(vma);
vma->detached = detached;
}
extern const struct vm_operations_struct vma_dummy_vm_ops;
static inline void vma_init(struct vm_area_struct *vma, struct mm_struct *mm)
{
memset(vma, 0, sizeof(*vma));
vma->vm_mm = mm;
vma->vm_ops = &vma_dummy_vm_ops;
INIT_LIST_HEAD(&vma->anon_vma_chain);
vma_mark_detached(vma, false);
}
static inline struct vm_area_struct *vm_area_alloc(struct mm_struct *mm)
{
struct vm_area_struct *vma = calloc(1, sizeof(struct vm_area_struct));
if (!vma)
return NULL;
vma_init(vma, mm);
if (!vma_lock_alloc(vma)) {
free(vma);
return NULL;
}
return vma;
}
static inline struct vm_area_struct *vm_area_dup(struct vm_area_struct *orig)
{
struct vm_area_struct *new = calloc(1, sizeof(struct vm_area_struct));
if (!new)
return NULL;
memcpy(new, orig, sizeof(*new));
if (!vma_lock_alloc(new)) {
free(new);
return NULL;
}
INIT_LIST_HEAD(&new->anon_vma_chain);
return new;
}
/*
* These are defined in vma.h, but sadly vm_stat_account() is referenced by
* kernel/fork.c, so we have to these broadly available there, and temporarily
* define them here to resolve the dependency cycle.
*/
#define is_exec_mapping(flags) \
((flags & (VM_EXEC | VM_WRITE | VM_STACK)) == VM_EXEC)
#define is_stack_mapping(flags) \
(((flags & VM_STACK) == VM_STACK) || (flags & VM_SHADOW_STACK))
#define is_data_mapping(flags) \
((flags & (VM_WRITE | VM_SHARED | VM_STACK)) == VM_WRITE)
static inline void vm_stat_account(struct mm_struct *mm, vm_flags_t flags,
long npages)
{
WRITE_ONCE(mm->total_vm, READ_ONCE(mm->total_vm)+npages);
if (is_exec_mapping(flags))
mm->exec_vm += npages;
else if (is_stack_mapping(flags))
mm->stack_vm += npages;
else if (is_data_mapping(flags))
mm->data_vm += npages;
}
#undef is_exec_mapping
#undef is_stack_mapping
#undef is_data_mapping
/* Currently stubbed but we may later wish to un-stub. */
static inline void vm_acct_memory(long pages);
static inline void vm_unacct_memory(long pages)
{
vm_acct_memory(-pages);
}
static inline void mapping_allow_writable(struct address_space *mapping)
{
atomic_inc(&mapping->i_mmap_writable);
}
static inline void vma_set_range(struct vm_area_struct *vma,
unsigned long start, unsigned long end,
pgoff_t pgoff)
{
vma->vm_start = start;
vma->vm_end = end;
vma->vm_pgoff = pgoff;
}
static inline
struct vm_area_struct *vma_find(struct vma_iterator *vmi, unsigned long max)
{
return mas_find(&vmi->mas, max - 1);
}
static inline int vma_iter_clear_gfp(struct vma_iterator *vmi,
unsigned long start, unsigned long end, gfp_t gfp)
{
__mas_set_range(&vmi->mas, start, end - 1);
mas_store_gfp(&vmi->mas, NULL, gfp);
if (unlikely(mas_is_err(&vmi->mas)))
return -ENOMEM;
return 0;
}
static inline void mmap_assert_locked(struct mm_struct *);
static inline struct vm_area_struct *find_vma_intersection(struct mm_struct *mm,
unsigned long start_addr,
unsigned long end_addr)
{
unsigned long index = start_addr;
mmap_assert_locked(mm);
return mt_find(&mm->mm_mt, &index, end_addr - 1);
}
static inline
struct vm_area_struct *vma_lookup(struct mm_struct *mm, unsigned long addr)
{
return mtree_load(&mm->mm_mt, addr);
}
static inline struct vm_area_struct *vma_prev(struct vma_iterator *vmi)
{
return mas_prev(&vmi->mas, 0);
}
static inline void vma_iter_set(struct vma_iterator *vmi, unsigned long addr)
{
mas_set(&vmi->mas, addr);
}
static inline bool vma_is_anonymous(struct vm_area_struct *vma)
{
return !vma->vm_ops;
}
/* Defined in vma.h, so temporarily define here to avoid circular dependency. */
#define vma_iter_load(vmi) \
mas_walk(&(vmi)->mas)
static inline struct vm_area_struct *
find_vma_prev(struct mm_struct *mm, unsigned long addr,
struct vm_area_struct **pprev)
{
struct vm_area_struct *vma;
VMA_ITERATOR(vmi, mm, addr);
vma = vma_iter_load(&vmi);
*pprev = vma_prev(&vmi);
if (!vma)
vma = vma_next(&vmi);
return vma;
}
#undef vma_iter_load
static inline void vma_iter_init(struct vma_iterator *vmi,
struct mm_struct *mm, unsigned long addr)
{
mas_init(&vmi->mas, &mm->mm_mt, addr);
}
/* Stubbed functions. */
static inline struct anon_vma_name *anon_vma_name(struct vm_area_struct *vma)
{
return NULL;
}
static inline bool is_mergeable_vm_userfaultfd_ctx(struct vm_area_struct *vma,
struct vm_userfaultfd_ctx vm_ctx)
{
return true;
}
static inline bool anon_vma_name_eq(struct anon_vma_name *anon_name1,
struct anon_vma_name *anon_name2)
{
return true;
}
static inline void might_sleep(void)
{
}
static inline unsigned long vma_pages(struct vm_area_struct *vma)
{
return (vma->vm_end - vma->vm_start) >> PAGE_SHIFT;
}
static inline void fput(struct file *)
{
}
static inline void mpol_put(struct mempolicy *)
{
}
static inline void vma_lock_free(struct vm_area_struct *vma)
{
free(vma->vm_lock);
}
static inline void __vm_area_free(struct vm_area_struct *vma)
{
vma_lock_free(vma);
free(vma);
}
static inline void vm_area_free(struct vm_area_struct *vma)
{
__vm_area_free(vma);
}
static inline void lru_add_drain(void)
{
}
static inline void tlb_gather_mmu(struct mmu_gather *, struct mm_struct *)
{
}
static inline void update_hiwater_rss(struct mm_struct *)
{
}
static inline void update_hiwater_vm(struct mm_struct *)
{
}
static inline void unmap_vmas(struct mmu_gather *tlb, struct ma_state *mas,
struct vm_area_struct *vma, unsigned long start_addr,
unsigned long end_addr, unsigned long tree_end,
bool mm_wr_locked)
{
(void)tlb;
(void)mas;
(void)vma;
(void)start_addr;
(void)end_addr;
(void)tree_end;
(void)mm_wr_locked;
}
static inline void free_pgtables(struct mmu_gather *tlb, struct ma_state *mas,
struct vm_area_struct *vma, unsigned long floor,
unsigned long ceiling, bool mm_wr_locked)
{
(void)tlb;
(void)mas;
(void)vma;
(void)floor;
(void)ceiling;
(void)mm_wr_locked;
}
static inline void mapping_unmap_writable(struct address_space *)
{
}
static inline void flush_dcache_mmap_lock(struct address_space *)
{
}
static inline void tlb_finish_mmu(struct mmu_gather *)
{
}
static inline void get_file(struct file *)
{
}
static inline int vma_dup_policy(struct vm_area_struct *, struct vm_area_struct *)
{
return 0;
}
static inline int anon_vma_clone(struct vm_area_struct *dst, struct vm_area_struct *src)
{
/* For testing purposes. We indicate that an anon_vma has been cloned. */
if (src->anon_vma != NULL) {
dst->anon_vma = src->anon_vma;
dst->anon_vma->was_cloned = true;
}
return 0;
}
static inline void vma_start_write(struct vm_area_struct *vma)
{
/* Used to indicate to tests that a write operation has begun. */
vma->vm_lock_seq++;
}
static inline void vma_adjust_trans_huge(struct vm_area_struct *vma,
unsigned long start,
unsigned long end,
long adjust_next)
{
(void)vma;
(void)start;
(void)end;
(void)adjust_next;
}
static inline void vma_iter_free(struct vma_iterator *vmi)
{
mas_destroy(&vmi->mas);
}
static inline
struct vm_area_struct *vma_iter_next_range(struct vma_iterator *vmi)
{
return mas_next_range(&vmi->mas, ULONG_MAX);
}
static inline void vm_acct_memory(long pages)
{
}
static inline void vma_interval_tree_insert(struct vm_area_struct *,
struct rb_root_cached *)
{
}
static inline void vma_interval_tree_remove(struct vm_area_struct *,
struct rb_root_cached *)
{
}
static inline void flush_dcache_mmap_unlock(struct address_space *)
{
}
static inline void anon_vma_interval_tree_insert(struct anon_vma_chain*,
struct rb_root_cached *)
{
}
static inline void anon_vma_interval_tree_remove(struct anon_vma_chain*,
struct rb_root_cached *)
{
}
static inline void uprobe_mmap(struct vm_area_struct *)
{
}
static inline void uprobe_munmap(struct vm_area_struct *vma,
unsigned long start, unsigned long end)
{
(void)vma;
(void)start;
(void)end;
}
static inline void i_mmap_lock_write(struct address_space *)
{
}
static inline void anon_vma_lock_write(struct anon_vma *)
{
}
static inline void vma_assert_write_locked(struct vm_area_struct *)
{
}
static inline void unlink_anon_vmas(struct vm_area_struct *vma)
{
/* For testing purposes, indicate that the anon_vma was unlinked. */
vma->anon_vma->was_unlinked = true;
}
static inline void anon_vma_unlock_write(struct anon_vma *)
{
}
static inline void i_mmap_unlock_write(struct address_space *)
{
}
static inline void anon_vma_merge(struct vm_area_struct *,
struct vm_area_struct *)
{
}
static inline int userfaultfd_unmap_prep(struct vm_area_struct *vma,
unsigned long start,
unsigned long end,
struct list_head *unmaps)
{
(void)vma;
(void)start;
(void)end;
(void)unmaps;
return 0;
}
static inline void mmap_write_downgrade(struct mm_struct *)
{
}
static inline void mmap_read_unlock(struct mm_struct *)
{
}
static inline void mmap_write_unlock(struct mm_struct *)
{
}
static inline bool can_modify_mm(struct mm_struct *mm,
unsigned long start,
unsigned long end)
{
(void)mm;
(void)start;
(void)end;
return true;
}
static inline void arch_unmap(struct mm_struct *mm,
unsigned long start,
unsigned long end)
{
(void)mm;
(void)start;
(void)end;
}
static inline void mmap_assert_locked(struct mm_struct *)
{
}
static inline bool mpol_equal(struct mempolicy *, struct mempolicy *)
{
return true;
}
static inline void khugepaged_enter_vma(struct vm_area_struct *vma,
unsigned long vm_flags)
{
(void)vma;
(void)vm_flags;
}
static inline bool mapping_can_writeback(struct address_space *)
{
return true;
}
static inline bool is_vm_hugetlb_page(struct vm_area_struct *)
{
return false;
}
static inline bool vma_soft_dirty_enabled(struct vm_area_struct *)
{
return false;
}
static inline bool userfaultfd_wp(struct vm_area_struct *)
{
return false;
}
static inline void mmap_assert_write_locked(struct mm_struct *)
{
}
static inline void mutex_lock(struct mutex *)
{
}
static inline void mutex_unlock(struct mutex *)
{
}
static inline bool mutex_is_locked(struct mutex *)
{
return true;
}
static inline bool signal_pending(void *)
{
return false;
}
#endif /* __MM_VMA_INTERNAL_H */
Codebase Browser
linux