diff options
Diffstat (limited to 'mm/shmem.c')
| -rw-r--r-- | mm/shmem.c | 49 |
1 files changed, 29 insertions, 20 deletions
diff --git a/mm/shmem.c b/mm/shmem.c index 07a1d22807be..4aa9307feab0 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -338,7 +338,7 @@ static int shmem_radix_tree_replace(struct address_space *mapping, if (item != expected) return -ENOENT; __radix_tree_replace(&mapping->page_tree, node, pslot, - replacement, NULL, NULL); + replacement, NULL); return 0; } @@ -747,7 +747,7 @@ void shmem_unlock_mapping(struct address_space *mapping) pgoff_t indices[PAGEVEC_SIZE]; pgoff_t index = 0; - pagevec_init(&pvec, 0); + pagevec_init(&pvec); /* * Minor point, but we might as well stop if someone else SHM_LOCKs it. */ @@ -790,7 +790,7 @@ static void shmem_undo_range(struct inode *inode, loff_t lstart, loff_t lend, if (lend == -1) end = -1; /* unsigned, so actually very big */ - pagevec_init(&pvec, 0); + pagevec_init(&pvec); index = start; while (index < end) { pvec.nr = find_get_entries(mapping, index, @@ -2528,7 +2528,7 @@ static pgoff_t shmem_seek_hole_data(struct address_space *mapping, bool done = false; int i; - pagevec_init(&pvec, 0); + pagevec_init(&pvec); pvec.nr = 1; /* start small: we may be there already */ while (!done) { pvec.nr = find_get_entries(mapping, index, @@ -3202,7 +3202,6 @@ static int shmem_symlink(struct inode *dir, struct dentry *dentry, const char *s int len; struct inode *inode; struct page *page; - struct shmem_inode_info *info; len = strlen(symname) + 1; if (len > PAGE_SIZE) @@ -3222,7 +3221,6 @@ static int shmem_symlink(struct inode *dir, struct dentry *dentry, const char *s error = 0; } - info = SHMEM_I(inode); inode->i_size = len-1; if (len <= SHORT_SYMLINK_LEN) { inode->i_link = kmemdup(symname, len, GFP_KERNEL); @@ -3862,12 +3860,11 @@ static void shmem_init_inode(void *foo) inode_init_once(&info->vfs_inode); } -static int shmem_init_inodecache(void) +static void shmem_init_inodecache(void) { shmem_inode_cachep = kmem_cache_create("shmem_inode_cache", sizeof(struct shmem_inode_info), 0, SLAB_PANIC|SLAB_ACCOUNT, shmem_init_inode); - return 0; } static void shmem_destroy_inodecache(void) @@ -3991,9 +3988,7 @@ int __init shmem_init(void) if (shmem_inode_cachep) return 0; - error = shmem_init_inodecache(); - if (error) - goto out3; + shmem_init_inodecache(); error = register_filesystem(&shmem_fs_type); if (error) { @@ -4020,7 +4015,6 @@ out1: unregister_filesystem(&shmem_fs_type); out2: shmem_destroy_inodecache(); -out3: shm_mnt = ERR_PTR(error); return error; } @@ -4102,6 +4096,7 @@ bool shmem_huge_enabled(struct vm_area_struct *vma) if (i_size >= HPAGE_PMD_SIZE && i_size >> PAGE_SHIFT >= off) return true; + /* fall through */ case SHMEM_HUGE_ADVISE: /* TODO: implement fadvise() hints */ return (vma->vm_flags & VM_HUGEPAGE); @@ -4183,7 +4178,7 @@ static const struct dentry_operations anon_ops = { .d_dname = simple_dname }; -static struct file *__shmem_file_setup(const char *name, loff_t size, +static struct file *__shmem_file_setup(struct vfsmount *mnt, const char *name, loff_t size, unsigned long flags, unsigned int i_flags) { struct file *res; @@ -4192,8 +4187,8 @@ static struct file *__shmem_file_setup(const char *name, loff_t size, struct super_block *sb; struct qstr this; - if (IS_ERR(shm_mnt)) - return ERR_CAST(shm_mnt); + if (IS_ERR(mnt)) + return ERR_CAST(mnt); if (size < 0 || size > MAX_LFS_FILESIZE) return ERR_PTR(-EINVAL); @@ -4205,8 +4200,8 @@ static struct file *__shmem_file_setup(const char *name, loff_t size, this.name = name; this.len = strlen(name); this.hash = 0; /* will go */ - sb = shm_mnt->mnt_sb; - path.mnt = mntget(shm_mnt); + sb = mnt->mnt_sb; + path.mnt = mntget(mnt); path.dentry = d_alloc_pseudo(sb, &this); if (!path.dentry) goto put_memory; @@ -4251,7 +4246,7 @@ put_path: */ struct file *shmem_kernel_file_setup(const char *name, loff_t size, unsigned long flags) { - return __shmem_file_setup(name, size, flags, S_PRIVATE); + return __shmem_file_setup(shm_mnt, name, size, flags, S_PRIVATE); } /** @@ -4262,11 +4257,25 @@ struct file *shmem_kernel_file_setup(const char *name, loff_t size, unsigned lon */ struct file *shmem_file_setup(const char *name, loff_t size, unsigned long flags) { - return __shmem_file_setup(name, size, flags, 0); + return __shmem_file_setup(shm_mnt, name, size, flags, 0); } EXPORT_SYMBOL_GPL(shmem_file_setup); /** + * shmem_file_setup_with_mnt - get an unlinked file living in tmpfs + * @mnt: the tmpfs mount where the file will be created + * @name: name for dentry (to be seen in /proc/<pid>/maps + * @size: size to be set for the file + * @flags: VM_NORESERVE suppresses pre-accounting of the entire object size + */ +struct file *shmem_file_setup_with_mnt(struct vfsmount *mnt, const char *name, + loff_t size, unsigned long flags) +{ + return __shmem_file_setup(mnt, name, size, flags, 0); +} +EXPORT_SYMBOL_GPL(shmem_file_setup_with_mnt); + +/** * shmem_zero_setup - setup a shared anonymous mapping * @vma: the vma to be mmapped is prepared by do_mmap_pgoff */ @@ -4281,7 +4290,7 @@ int shmem_zero_setup(struct vm_area_struct *vma) * accessible to the user through its mapping, use S_PRIVATE flag to * bypass file security, in the same way as shmem_kernel_file_setup(). */ - file = __shmem_file_setup("dev/zero", size, vma->vm_flags, S_PRIVATE); + file = shmem_kernel_file_setup("dev/zero", size, vma->vm_flags); if (IS_ERR(file)) return PTR_ERR(file); |