ACPI: video: Fix null pointer in appledisplay driver

[pandora-kernel.git] / mm / mmap.c

diff --git a/mm/mmap.c b/mm/mmap.c
index 497e502..cc3a208 100644 (file)
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -188,7 +188,7 @@ static void __remove_shared_vm_struct(struct vm_area_struct *vma,
                struct file *file, struct address_space *mapping)
 {
        if (vma->vm_flags & VM_DENYWRITE)
-               atomic_inc(&file->f_dentry->d_inode->i_writecount);
+               atomic_inc(&file->f_path.dentry->d_inode->i_writecount);
        if (vma->vm_flags & VM_SHARED)
                mapping->i_mmap_writable--;
 
@@ -399,7 +399,7 @@ static inline void __vma_link_file(struct vm_area_struct *vma)
                struct address_space *mapping = file->f_mapping;
 
                if (vma->vm_flags & VM_DENYWRITE)
-                       atomic_dec(&file->f_dentry->d_inode->i_writecount);
+                       atomic_dec(&file->f_path.dentry->d_inode->i_writecount);
                if (vma->vm_flags & VM_SHARED)
                        mapping->i_mmap_writable++;
 
@@ -907,7 +907,7 @@ unsigned long do_mmap_pgoff(struct file * file, unsigned long addr,
         *  mounted, in which case we dont add PROT_EXEC.)
         */
        if ((prot & PROT_READ) && (current->personality & READ_IMPLIES_EXEC))
-               if (!(file && (file->f_vfsmnt->mnt_flags & MNT_NOEXEC)))
+               if (!(file && (file->f_path.mnt->mnt_flags & MNT_NOEXEC)))
                        prot |= PROT_EXEC;
 
        if (!len)
@@ -960,7 +960,7 @@ unsigned long do_mmap_pgoff(struct file * file, unsigned long addr,
                        return -EAGAIN;
        }
 
-       inode = file ? file->f_dentry->d_inode : NULL;
+       inode = file ? file->f_path.dentry->d_inode : NULL;
 
        if (file) {
                switch (flags & MAP_TYPE) {
@@ -989,7 +989,7 @@ unsigned long do_mmap_pgoff(struct file * file, unsigned long addr,
                case MAP_PRIVATE:
                        if (!(file->f_mode & FMODE_READ))
                                return -EACCES;
-                       if (file->f_vfsmnt->mnt_flags & MNT_NOEXEC) {
+                       if (file->f_path.mnt->mnt_flags & MNT_NOEXEC) {
                                if (vm_flags & VM_EXEC)
                                        return -EPERM;
                                vm_flags &= ~VM_MAYEXEC;
@@ -1379,7 +1379,7 @@ get_unmapped_area(struct file *file, unsigned long addr, unsigned long len,
                 * Check if the given range is hugepage aligned, and
                 * can be made suitable for hugepages.
                 */
-               ret = prepare_hugepage_range(addr, len);
+               ret = prepare_hugepage_range(addr, len, pgoff);
        } else {
                /*
                 * Ensure that a normal request is not falling in a
@@ -1477,6 +1477,7 @@ static int acct_stack_growth(struct vm_area_struct * vma, unsigned long size, un
 {
        struct mm_struct *mm = vma->vm_mm;
        struct rlimit *rlim = current->signal->rlim;
+       unsigned long new_start;
 
        /* address space limit tests */
        if (!may_expand_vm(mm, grow))
@@ -1496,6 +1497,12 @@ static int acct_stack_growth(struct vm_area_struct * vma, unsigned long size, un
                        return -ENOMEM;
        }
 
+       /* Check to ensure the stack will not grow into a hugetlb-only region */
+       new_start = (vma->vm_flags & VM_GROWSUP) ? vma->vm_start :
+                       vma->vm_end - size;
+       if (is_hugepage_only_range(vma->vm_mm, new_start, size))
+               return -EFAULT;
+
        /*
         * Overcommit..  This must be the final test, as it will
         * update security statistics.
@@ -1736,7 +1743,7 @@ int split_vma(struct mm_struct * mm, struct vm_area_struct * vma,
        if (mm->map_count >= sysctl_max_map_count)
                return -ENOMEM;
 
-       new = kmem_cache_alloc(vm_area_cachep, SLAB_KERNEL);
+       new = kmem_cache_alloc(vm_area_cachep, GFP_KERNEL);
        if (!new)
                return -ENOMEM;
 
@@ -1880,6 +1887,9 @@ unsigned long do_brk(unsigned long addr, unsigned long len)
        if ((addr + len) > TASK_SIZE || (addr + len) < addr)
                return -EINVAL;
 
+       if (is_hugepage_only_range(mm, addr, len))
+               return -EINVAL;
+
        flags = VM_DATA_DEFAULT_FLAGS | VM_ACCOUNT | mm->def_flags;
 
        error = arch_mmap_check(addr, len, flags);
@@ -2054,7 +2064,7 @@ struct vm_area_struct *copy_vma(struct vm_area_struct **vmap,
                    vma_start < new_vma->vm_end)
                        *vmap = new_vma;
        } else {
-               new_vma = kmem_cache_alloc(vm_area_cachep, SLAB_KERNEL);
+               new_vma = kmem_cache_alloc(vm_area_cachep, GFP_KERNEL);
                if (new_vma) {
                        *new_vma = *vma;
                        pol = mpol_copy(vma_policy(vma));