diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/fremap.c | 12 | ||||
| -rw-r--r-- | mm/mlock.c | 19 | ||||
| -rw-r--r-- | mm/mmap.c | 4 |
3 files changed, 21 insertions, 14 deletions
diff --git a/mm/fremap.c b/mm/fremap.c index 503a72387087..0cd4c11488ed 100644 --- a/mm/fremap.c +++ b/mm/fremap.c @@ -204,8 +204,10 @@ get_write_lock: unsigned long addr; struct file *file = get_file(vma->vm_file); - addr = mmap_region(file, start, size, - vma->vm_flags, pgoff); + vm_flags = vma->vm_flags; + if (!(flags & MAP_NONBLOCK)) + vm_flags |= VM_POPULATE; + addr = mmap_region(file, start, size, vm_flags, pgoff); fput(file); if (IS_ERR_VALUE(addr)) { err = addr; @@ -224,6 +226,12 @@ get_write_lock: mutex_unlock(&mapping->i_mmap_mutex); } + if (!(flags & MAP_NONBLOCK) && !(vma->vm_flags & VM_POPULATE)) { + if (!has_write_lock) + goto get_write_lock; + vma->vm_flags |= VM_POPULATE; + } + if (vma->vm_flags & VM_LOCKED) { /* * drop PG_Mlocked flag for over-mapped range diff --git a/mm/mlock.c b/mm/mlock.c index 569400a5d079..d6378feb2950 100644 --- a/mm/mlock.c +++ b/mm/mlock.c @@ -340,9 +340,9 @@ static int do_mlock(unsigned long start, size_t len, int on) /* Here we know that vma->vm_start <= nstart < vma->vm_end. */ - newflags = vma->vm_flags | VM_LOCKED; - if (!on) - newflags &= ~VM_LOCKED; + newflags = vma->vm_flags & ~VM_LOCKED; + if (on) + newflags |= VM_LOCKED | VM_POPULATE; tmp = vma->vm_end; if (tmp > end) @@ -402,7 +402,8 @@ int __mm_populate(unsigned long start, unsigned long len, int ignore_errors) * range with the first VMA. Also, skip undesirable VMA types. */ nend = min(end, vma->vm_end); - if (vma->vm_flags & (VM_IO | VM_PFNMAP)) + if ((vma->vm_flags & (VM_IO | VM_PFNMAP | VM_POPULATE)) != + VM_POPULATE) continue; if (nstart < vma->vm_start) nstart = vma->vm_start; @@ -475,18 +476,18 @@ static int do_mlockall(int flags) struct vm_area_struct * vma, * prev = NULL; if (flags & MCL_FUTURE) - current->mm->def_flags |= VM_LOCKED; + current->mm->def_flags |= VM_LOCKED | VM_POPULATE; else - current->mm->def_flags &= ~VM_LOCKED; + current->mm->def_flags &= ~(VM_LOCKED | VM_POPULATE); if (flags == MCL_FUTURE) goto out; for (vma = current->mm->mmap; vma ; vma = prev->vm_next) { vm_flags_t newflags; - newflags = vma->vm_flags | VM_LOCKED; - if (!(flags & MCL_CURRENT)) - newflags &= ~VM_LOCKED; + newflags = vma->vm_flags & ~VM_LOCKED; + if (flags & MCL_CURRENT) + newflags |= VM_LOCKED | VM_POPULATE; /* Ignore errors */ mlock_fixup(vma, &prev, vma->vm_start, vma->vm_end, newflags); diff --git a/mm/mmap.c b/mm/mmap.c index 8826c77513a9..39a3944e1658 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -1306,9 +1306,7 @@ unsigned long do_mmap_pgoff(struct file *file, unsigned long addr, } addr = mmap_region(file, addr, len, vm_flags, pgoff); - if (!IS_ERR_VALUE(addr) && - ((vm_flags & VM_LOCKED) || - (flags & (MAP_POPULATE | MAP_NONBLOCK)) == MAP_POPULATE)) + if (!IS_ERR_VALUE(addr) && (vm_flags & VM_POPULATE)) *populate = true; return addr; } |