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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-03-25 03:53:42 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-03-25 03:53:42 -0300
commit03dd4cb26d967f9588437b0fc9cc0e8353322bb7 (patch)
treefa581f6dc1c0596391690d1f67eceef3af8246dc /mm/shmem.c
parentd4e493caf788ef44982e131ff9c786546904d934 (diff)
Linux-libre 4.5-gnu
Diffstat (limited to 'mm/shmem.c')
-rw-r--r--mm/shmem.c336
1 files changed, 191 insertions, 145 deletions
diff --git a/mm/shmem.c b/mm/shmem.c
index c89e5ec9a..440e2a7e6 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -360,6 +360,87 @@ static int shmem_free_swap(struct address_space *mapping,
}
/*
+ * Determine (in bytes) how many of the shmem object's pages mapped by the
+ * given offsets are swapped out.
+ *
+ * This is safe to call without i_mutex or mapping->tree_lock thanks to RCU,
+ * as long as the inode doesn't go away and racy results are not a problem.
+ */
+unsigned long shmem_partial_swap_usage(struct address_space *mapping,
+ pgoff_t start, pgoff_t end)
+{
+ struct radix_tree_iter iter;
+ void **slot;
+ struct page *page;
+ unsigned long swapped = 0;
+
+ rcu_read_lock();
+
+restart:
+ radix_tree_for_each_slot(slot, &mapping->page_tree, &iter, start) {
+ if (iter.index >= end)
+ break;
+
+ page = radix_tree_deref_slot(slot);
+
+ /*
+ * This should only be possible to happen at index 0, so we
+ * don't need to reset the counter, nor do we risk infinite
+ * restarts.
+ */
+ if (radix_tree_deref_retry(page))
+ goto restart;
+
+ if (radix_tree_exceptional_entry(page))
+ swapped++;
+
+ if (need_resched()) {
+ cond_resched_rcu();
+ start = iter.index + 1;
+ goto restart;
+ }
+ }
+
+ rcu_read_unlock();
+
+ return swapped << PAGE_SHIFT;
+}
+
+/*
+ * Determine (in bytes) how many of the shmem object's pages mapped by the
+ * given vma is swapped out.
+ *
+ * This is safe to call without i_mutex or mapping->tree_lock thanks to RCU,
+ * as long as the inode doesn't go away and racy results are not a problem.
+ */
+unsigned long shmem_swap_usage(struct vm_area_struct *vma)
+{
+ struct inode *inode = file_inode(vma->vm_file);
+ struct shmem_inode_info *info = SHMEM_I(inode);
+ struct address_space *mapping = inode->i_mapping;
+ unsigned long swapped;
+
+ /* Be careful as we don't hold info->lock */
+ swapped = READ_ONCE(info->swapped);
+
+ /*
+ * The easier cases are when the shmem object has nothing in swap, or
+ * the vma maps it whole. Then we can simply use the stats that we
+ * already track.
+ */
+ if (!swapped)
+ return 0;
+
+ if (!vma->vm_pgoff && vma->vm_end - vma->vm_start >= inode->i_size)
+ return swapped << PAGE_SHIFT;
+
+ /* Here comes the more involved part */
+ return shmem_partial_swap_usage(mapping,
+ linear_page_index(vma, vma->vm_start),
+ linear_page_index(vma, vma->vm_end));
+}
+
+/*
* SysV IPC SHM_UNLOCK restore Unevictable pages to their evictable lists.
*/
void shmem_unlock_mapping(struct address_space *mapping)
@@ -728,7 +809,8 @@ int shmem_unuse(swp_entry_t swap, struct page *page)
* the shmem_swaplist_mutex which might hold up shmem_writepage().
* Charged back to the user (not to caller) when swap account is used.
*/
- error = mem_cgroup_try_charge(page, current->mm, GFP_KERNEL, &memcg);
+ error = mem_cgroup_try_charge(page, current->mm, GFP_KERNEL, &memcg,
+ false);
if (error)
goto out;
/* No radix_tree_preload: swap entry keeps a place for page in tree */
@@ -751,9 +833,9 @@ int shmem_unuse(swp_entry_t swap, struct page *page)
if (error) {
if (error != -ENOMEM)
error = 0;
- mem_cgroup_cancel_charge(page, memcg);
+ mem_cgroup_cancel_charge(page, memcg, false);
} else
- mem_cgroup_commit_charge(page, memcg, true);
+ mem_cgroup_commit_charge(page, memcg, true, false);
out:
unlock_page(page);
page_cache_release(page);
@@ -829,6 +911,9 @@ static int shmem_writepage(struct page *page, struct writeback_control *wbc)
if (!swap.val)
goto redirty;
+ if (mem_cgroup_try_charge_swap(page, swap))
+ goto free_swap;
+
/*
* Add inode to shmem_unuse()'s list of swapped-out inodes,
* if it's not already there. Do it now before the page is
@@ -857,6 +942,7 @@ static int shmem_writepage(struct page *page, struct writeback_control *wbc)
}
mutex_unlock(&shmem_swaplist_mutex);
+free_swap:
swapcache_free(swap);
redirty:
set_page_dirty(page);
@@ -1003,7 +1089,7 @@ static int shmem_replace_page(struct page **pagep, gfp_t gfp,
copy_highpage(newpage, oldpage);
flush_dcache_page(newpage);
- __set_page_locked(newpage);
+ __SetPageLocked(newpage);
SetPageUptodate(newpage);
SetPageSwapBacked(newpage);
set_page_private(newpage, swap_index);
@@ -1136,7 +1222,8 @@ repeat:
goto failed;
}
- error = mem_cgroup_try_charge(page, current->mm, gfp, &memcg);
+ error = mem_cgroup_try_charge(page, current->mm, gfp, &memcg,
+ false);
if (!error) {
error = shmem_add_to_page_cache(page, mapping, index,
swp_to_radix_entry(swap));
@@ -1153,14 +1240,14 @@ repeat:
* "repeat": reading a hole and writing should succeed.
*/
if (error) {
- mem_cgroup_cancel_charge(page, memcg);
+ mem_cgroup_cancel_charge(page, memcg, false);
delete_from_swap_cache(page);
}
}
if (error)
goto failed;
- mem_cgroup_commit_charge(page, memcg, true);
+ mem_cgroup_commit_charge(page, memcg, true, false);
spin_lock(&info->lock);
info->swapped--;
@@ -1195,11 +1282,12 @@ repeat:
}
__SetPageSwapBacked(page);
- __set_page_locked(page);
+ __SetPageLocked(page);
if (sgp == SGP_WRITE)
__SetPageReferenced(page);
- error = mem_cgroup_try_charge(page, current->mm, gfp, &memcg);
+ error = mem_cgroup_try_charge(page, current->mm, gfp, &memcg,
+ false);
if (error)
goto decused;
error = radix_tree_maybe_preload(gfp & GFP_RECLAIM_MASK);
@@ -1209,10 +1297,10 @@ repeat:
radix_tree_preload_end();
}
if (error) {
- mem_cgroup_cancel_charge(page, memcg);
+ mem_cgroup_cancel_charge(page, memcg, false);
goto decused;
}
- mem_cgroup_commit_charge(page, memcg, false);
+ mem_cgroup_commit_charge(page, memcg, false, false);
lru_cache_add_anon(page);
spin_lock(&info->lock);
@@ -1412,7 +1500,7 @@ static int shmem_mmap(struct file *file, struct vm_area_struct *vma)
}
static struct inode *shmem_get_inode(struct super_block *sb, const struct inode *dir,
- umode_t mode, dev_t dev, unsigned long flags, int atomic_copy)
+ umode_t mode, dev_t dev, unsigned long flags)
{
struct inode *inode;
struct shmem_inode_info *info;
@@ -1433,8 +1521,6 @@ static struct inode *shmem_get_inode(struct super_block *sb, const struct inode
spin_lock_init(&info->lock);
info->seals = F_SEAL_SEAL;
info->flags = flags & VM_NORESERVE;
- if (atomic_copy)
- inode->i_flags |= S_ATOMIC_COPY;
INIT_LIST_HEAD(&info->swaplist);
simple_xattrs_init(&info->xattrs);
cache_no_acl(inode);
@@ -1815,7 +1901,7 @@ static loff_t shmem_file_llseek(struct file *file, loff_t offset, int whence)
if (whence != SEEK_DATA && whence != SEEK_HOLE)
return generic_file_llseek_size(file, offset, whence,
MAX_LFS_FILESIZE, i_size_read(inode));
- mutex_lock(&inode->i_mutex);
+ inode_lock(inode);
/* We're holding i_mutex so we can access i_size directly */
if (offset < 0)
@@ -1839,7 +1925,7 @@ static loff_t shmem_file_llseek(struct file *file, loff_t offset, int whence)
if (offset >= 0)
offset = vfs_setpos(file, offset, MAX_LFS_FILESIZE);
- mutex_unlock(&inode->i_mutex);
+ inode_unlock(inode);
return offset;
}
@@ -2004,7 +2090,7 @@ int shmem_add_seals(struct file *file, unsigned int seals)
if (seals & ~(unsigned int)F_ALL_SEALS)
return -EINVAL;
- mutex_lock(&inode->i_mutex);
+ inode_lock(inode);
if (info->seals & F_SEAL_SEAL) {
error = -EPERM;
@@ -2027,7 +2113,7 @@ int shmem_add_seals(struct file *file, unsigned int seals)
error = 0;
unlock:
- mutex_unlock(&inode->i_mutex);
+ inode_unlock(inode);
return error;
}
EXPORT_SYMBOL_GPL(shmem_add_seals);
@@ -2077,7 +2163,7 @@ static long shmem_fallocate(struct file *file, int mode, loff_t offset,
if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE))
return -EOPNOTSUPP;
- mutex_lock(&inode->i_mutex);
+ inode_lock(inode);
if (mode & FALLOC_FL_PUNCH_HOLE) {
struct address_space *mapping = file->f_mapping;
@@ -2190,7 +2276,7 @@ undone:
inode->i_private = NULL;
spin_unlock(&inode->i_lock);
out:
- mutex_unlock(&inode->i_mutex);
+ inode_unlock(inode);
return error;
}
@@ -2224,7 +2310,7 @@ shmem_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t dev)
struct inode *inode;
int error = -ENOSPC;
- inode = shmem_get_inode(dir->i_sb, dir, mode, dev, VM_NORESERVE, 0);
+ inode = shmem_get_inode(dir->i_sb, dir, mode, dev, VM_NORESERVE);
if (inode) {
error = simple_acl_create(dir, inode);
if (error)
@@ -2253,7 +2339,7 @@ shmem_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode)
struct inode *inode;
int error = -ENOSPC;
- inode = shmem_get_inode(dir->i_sb, dir, mode, 0, VM_NORESERVE, 0);
+ inode = shmem_get_inode(dir->i_sb, dir, mode, 0, VM_NORESERVE);
if (inode) {
error = security_inode_init_security(inode, dir,
NULL,
@@ -2439,14 +2525,13 @@ static int shmem_symlink(struct inode *dir, struct dentry *dentry, const char *s
int len;
struct inode *inode;
struct page *page;
- char *kaddr;
struct shmem_inode_info *info;
len = strlen(symname) + 1;
if (len > PAGE_CACHE_SIZE)
return -ENAMETOOLONG;
- inode = shmem_get_inode(dir->i_sb, dir, S_IFLNK|S_IRWXUGO, 0, VM_NORESERVE, 0);
+ inode = shmem_get_inode(dir->i_sb, dir, S_IFLNK|S_IRWXUGO, 0, VM_NORESERVE);
if (!inode)
return -ENOSPC;
@@ -2470,6 +2555,7 @@ static int shmem_symlink(struct inode *dir, struct dentry *dentry, const char *s
}
inode->i_op = &shmem_short_symlink_operations;
} else {
+ inode_nohighmem(inode);
error = shmem_getpage(inode, 0, &page, SGP_WRITE, NULL);
if (error) {
iput(inode);
@@ -2477,9 +2563,7 @@ static int shmem_symlink(struct inode *dir, struct dentry *dentry, const char *s
}
inode->i_mapping->a_ops = &shmem_aops;
inode->i_op = &shmem_symlink_inode_operations;
- kaddr = kmap_atomic(page);
- memcpy(kaddr, symname, len);
- kunmap_atomic(kaddr);
+ memcpy(page_address(page), symname, len);
SetPageUptodate(page);
set_page_dirty(page);
unlock_page(page);
@@ -2492,23 +2576,34 @@ static int shmem_symlink(struct inode *dir, struct dentry *dentry, const char *s
return 0;
}
-static const char *shmem_follow_link(struct dentry *dentry, void **cookie)
+static void shmem_put_link(void *arg)
{
- struct page *page = NULL;
- int error = shmem_getpage(d_inode(dentry), 0, &page, SGP_READ, NULL);
- if (error)
- return ERR_PTR(error);
- unlock_page(page);
- *cookie = page;
- return kmap(page);
+ mark_page_accessed(arg);
+ put_page(arg);
}
-static void shmem_put_link(struct inode *unused, void *cookie)
+static const char *shmem_get_link(struct dentry *dentry,
+ struct inode *inode,
+ struct delayed_call *done)
{
- struct page *page = cookie;
- kunmap(page);
- mark_page_accessed(page);
- page_cache_release(page);
+ struct page *page = NULL;
+ int error;
+ if (!dentry) {
+ page = find_get_page(inode->i_mapping, 0);
+ if (!page)
+ return ERR_PTR(-ECHILD);
+ if (!PageUptodate(page)) {
+ put_page(page);
+ return ERR_PTR(-ECHILD);
+ }
+ } else {
+ error = shmem_getpage(inode, 0, &page, SGP_READ, NULL);
+ if (error)
+ return ERR_PTR(error);
+ unlock_page(page);
+ }
+ set_delayed_call(done, shmem_put_link, page);
+ return page_address(page);
}
#ifdef CONFIG_TMPFS_XATTR
@@ -2555,122 +2650,74 @@ static int shmem_initxattrs(struct inode *inode,
return 0;
}
-static const struct xattr_handler *shmem_xattr_handlers[] = {
-#ifdef CONFIG_TMPFS_POSIX_ACL
- &posix_acl_access_xattr_handler,
- &posix_acl_default_xattr_handler,
-#endif
- NULL
-};
-
-static int shmem_xattr_validate(const char *name)
-{
- struct { const char *prefix; size_t len; } arr[] = {
- { XATTR_SECURITY_PREFIX, XATTR_SECURITY_PREFIX_LEN },
- { XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN }
- };
- int i;
-
- for (i = 0; i < ARRAY_SIZE(arr); i++) {
- size_t preflen = arr[i].len;
- if (strncmp(name, arr[i].prefix, preflen) == 0) {
- if (!name[preflen])
- return -EINVAL;
- return 0;
- }
- }
- return -EOPNOTSUPP;
-}
-
-static ssize_t shmem_getxattr(struct dentry *dentry, const char *name,
- void *buffer, size_t size)
+static int shmem_xattr_handler_get(const struct xattr_handler *handler,
+ struct dentry *dentry, const char *name,
+ void *buffer, size_t size)
{
struct shmem_inode_info *info = SHMEM_I(d_inode(dentry));
- int err;
-
- /*
- * If this is a request for a synthetic attribute in the system.*
- * namespace use the generic infrastructure to resolve a handler
- * for it via sb->s_xattr.
- */
- if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN))
- return generic_getxattr(dentry, name, buffer, size);
-
- err = shmem_xattr_validate(name);
- if (err)
- return err;
+ name = xattr_full_name(handler, name);
return simple_xattr_get(&info->xattrs, name, buffer, size);
}
-static int shmem_setxattr(struct dentry *dentry, const char *name,
- const void *value, size_t size, int flags)
+static int shmem_xattr_handler_set(const struct xattr_handler *handler,
+ struct dentry *dentry, const char *name,
+ const void *value, size_t size, int flags)
{
struct shmem_inode_info *info = SHMEM_I(d_inode(dentry));
- int err;
-
- /*
- * If this is a request for a synthetic attribute in the system.*
- * namespace use the generic infrastructure to resolve a handler
- * for it via sb->s_xattr.
- */
- if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN))
- return generic_setxattr(dentry, name, value, size, flags);
-
- err = shmem_xattr_validate(name);
- if (err)
- return err;
+ name = xattr_full_name(handler, name);
return simple_xattr_set(&info->xattrs, name, value, size, flags);
}
-static int shmem_removexattr(struct dentry *dentry, const char *name)
-{
- struct shmem_inode_info *info = SHMEM_I(d_inode(dentry));
- int err;
-
- /*
- * If this is a request for a synthetic attribute in the system.*
- * namespace use the generic infrastructure to resolve a handler
- * for it via sb->s_xattr.
- */
- if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN))
- return generic_removexattr(dentry, name);
+static const struct xattr_handler shmem_security_xattr_handler = {
+ .prefix = XATTR_SECURITY_PREFIX,
+ .get = shmem_xattr_handler_get,
+ .set = shmem_xattr_handler_set,
+};
- err = shmem_xattr_validate(name);
- if (err)
- return err;
+static const struct xattr_handler shmem_trusted_xattr_handler = {
+ .prefix = XATTR_TRUSTED_PREFIX,
+ .get = shmem_xattr_handler_get,
+ .set = shmem_xattr_handler_set,
+};
- return simple_xattr_remove(&info->xattrs, name);
-}
+static const struct xattr_handler *shmem_xattr_handlers[] = {
+#ifdef CONFIG_TMPFS_POSIX_ACL
+ &posix_acl_access_xattr_handler,
+ &posix_acl_default_xattr_handler,
+#endif
+ &shmem_security_xattr_handler,
+ &shmem_trusted_xattr_handler,
+ NULL
+};
static ssize_t shmem_listxattr(struct dentry *dentry, char *buffer, size_t size)
{
struct shmem_inode_info *info = SHMEM_I(d_inode(dentry));
- return simple_xattr_list(&info->xattrs, buffer, size);
+ return simple_xattr_list(d_inode(dentry), &info->xattrs, buffer, size);
}
#endif /* CONFIG_TMPFS_XATTR */
static const struct inode_operations shmem_short_symlink_operations = {
.readlink = generic_readlink,
- .follow_link = simple_follow_link,
+ .get_link = simple_get_link,
#ifdef CONFIG_TMPFS_XATTR
- .setxattr = shmem_setxattr,
- .getxattr = shmem_getxattr,
+ .setxattr = generic_setxattr,
+ .getxattr = generic_getxattr,
.listxattr = shmem_listxattr,
- .removexattr = shmem_removexattr,
+ .removexattr = generic_removexattr,
#endif
};
static const struct inode_operations shmem_symlink_inode_operations = {
.readlink = generic_readlink,
- .follow_link = shmem_follow_link,
- .put_link = shmem_put_link,
+ .get_link = shmem_get_link,
#ifdef CONFIG_TMPFS_XATTR
- .setxattr = shmem_setxattr,
- .getxattr = shmem_getxattr,
+ .setxattr = generic_setxattr,
+ .getxattr = generic_getxattr,
.listxattr = shmem_listxattr,
- .removexattr = shmem_removexattr,
+ .removexattr = generic_removexattr,
#endif
};
@@ -2963,7 +3010,7 @@ SYSCALL_DEFINE2(memfd_create,
goto err_name;
}
- file = shmem_file_setup(name, 0, VM_NORESERVE, 0);
+ file = shmem_file_setup(name, 0, VM_NORESERVE);
if (IS_ERR(file)) {
error = PTR_ERR(file);
goto err_fd;
@@ -3054,7 +3101,7 @@ int shmem_fill_super(struct super_block *sb, void *data, int silent)
sb->s_flags |= MS_POSIXACL;
#endif
- inode = shmem_get_inode(sb, NULL, S_IFDIR | sbinfo->mode, 0, VM_NORESERVE, 0);
+ inode = shmem_get_inode(sb, NULL, S_IFDIR | sbinfo->mode, 0, VM_NORESERVE);
if (!inode)
goto failed;
inode->i_uid = sbinfo->uid;
@@ -3104,7 +3151,7 @@ static int shmem_init_inodecache(void)
{
shmem_inode_cachep = kmem_cache_create("shmem_inode_cache",
sizeof(struct shmem_inode_info),
- 0, SLAB_PANIC, shmem_init_inode);
+ 0, SLAB_PANIC|SLAB_ACCOUNT, shmem_init_inode);
return 0;
}
@@ -3143,10 +3190,10 @@ static const struct inode_operations shmem_inode_operations = {
.getattr = shmem_getattr,
.setattr = shmem_setattr,
#ifdef CONFIG_TMPFS_XATTR
- .setxattr = shmem_setxattr,
- .getxattr = shmem_getxattr,
+ .setxattr = generic_setxattr,
+ .getxattr = generic_getxattr,
.listxattr = shmem_listxattr,
- .removexattr = shmem_removexattr,
+ .removexattr = generic_removexattr,
.set_acl = simple_set_acl,
#endif
};
@@ -3165,10 +3212,10 @@ static const struct inode_operations shmem_dir_inode_operations = {
.tmpfile = shmem_tmpfile,
#endif
#ifdef CONFIG_TMPFS_XATTR
- .setxattr = shmem_setxattr,
- .getxattr = shmem_getxattr,
+ .setxattr = generic_setxattr,
+ .getxattr = generic_getxattr,
.listxattr = shmem_listxattr,
- .removexattr = shmem_removexattr,
+ .removexattr = generic_removexattr,
#endif
#ifdef CONFIG_TMPFS_POSIX_ACL
.setattr = shmem_setattr,
@@ -3178,10 +3225,10 @@ static const struct inode_operations shmem_dir_inode_operations = {
static const struct inode_operations shmem_special_inode_operations = {
#ifdef CONFIG_TMPFS_XATTR
- .setxattr = shmem_setxattr,
- .getxattr = shmem_getxattr,
+ .setxattr = generic_setxattr,
+ .getxattr = generic_getxattr,
.listxattr = shmem_listxattr,
- .removexattr = shmem_removexattr,
+ .removexattr = generic_removexattr,
#endif
#ifdef CONFIG_TMPFS_POSIX_ACL
.setattr = shmem_setattr,
@@ -3310,7 +3357,7 @@ EXPORT_SYMBOL_GPL(shmem_truncate_range);
#define shmem_vm_ops generic_file_vm_ops
#define shmem_file_operations ramfs_file_operations
-#define shmem_get_inode(sb, dir, mode, dev, flags, atomic_copy) ramfs_get_inode(sb, dir, mode, dev)
+#define shmem_get_inode(sb, dir, mode, dev, flags) ramfs_get_inode(sb, dir, mode, dev)
#define shmem_acct_size(flags, size) 0
#define shmem_unacct_size(flags, size) do {} while (0)
@@ -3323,8 +3370,7 @@ static struct dentry_operations anon_ops = {
};
static struct file *__shmem_file_setup(const char *name, loff_t size,
- unsigned long flags, unsigned int i_flags,
- int atomic_copy)
+ unsigned long flags, unsigned int i_flags)
{
struct file *res;
struct inode *inode;
@@ -3353,7 +3399,7 @@ static struct file *__shmem_file_setup(const char *name, loff_t size,
d_set_d_op(path.dentry, &anon_ops);
res = ERR_PTR(-ENOSPC);
- inode = shmem_get_inode(sb, NULL, S_IFREG | S_IRWXUGO, 0, flags, atomic_copy);
+ inode = shmem_get_inode(sb, NULL, S_IFREG | S_IRWXUGO, 0, flags);
if (!inode)
goto put_memory;
@@ -3389,9 +3435,9 @@ put_path:
* @size: size to be set for the file
* @flags: VM_NORESERVE suppresses pre-accounting of the entire object size
*/
-struct file *shmem_kernel_file_setup(const char *name, loff_t size, unsigned long flags, int atomic_copy)
+struct file *shmem_kernel_file_setup(const char *name, loff_t size, unsigned long flags)
{
- return __shmem_file_setup(name, size, flags, S_PRIVATE, atomic_copy);
+ return __shmem_file_setup(name, size, flags, S_PRIVATE);
}
/**
@@ -3400,9 +3446,9 @@ struct file *shmem_kernel_file_setup(const char *name, loff_t size, unsigned lon
* @size: size to be set for the file
* @flags: VM_NORESERVE suppresses pre-accounting of the entire object size
*/
-struct file *shmem_file_setup(const char *name, loff_t size, unsigned long flags, int atomic_copy)
+struct file *shmem_file_setup(const char *name, loff_t size, unsigned long flags)
{
- return __shmem_file_setup(name, size, flags, 0, atomic_copy);
+ return __shmem_file_setup(name, size, flags, 0);
}
EXPORT_SYMBOL_GPL(shmem_file_setup);
@@ -3421,7 +3467,7 @@ 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, 0);
+ file = __shmem_file_setup("dev/zero", size, vma->vm_flags, S_PRIVATE);
if (IS_ERR(file))
return PTR_ERR(file);