proc: don't use FOLL_FORCE for reading cmdline and environment

[cascardo/linux.git] / fs / inode.c

diff --git a/fs/inode.c b/fs/inode.c
index a3c7ba7..88110fd 100644 (file)
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -140,6 +140,8 @@ int inode_init_always(struct super_block *sb, struct inode *inode)
        inode->i_fop = &no_open_fops;
        inode->__i_nlink = 1;
        inode->i_opflags = 0;
+       if (sb->s_xattr)
+               inode->i_opflags |= IOP_XATTR;
        i_uid_write(inode, 0);
        i_gid_write(inode, 0);
        atomic_set(&inode->i_writecount, 0);
@@ -1684,7 +1686,7 @@ bool __atime_needs_update(const struct path *path, struct inode *inode,
        if ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))
                return false;
 
-       now = current_fs_time(inode->i_sb);
+       now = current_time(inode);
 
        if (!relatime_need_update(path, inode, now, rcu))
                return false;
@@ -1718,7 +1720,7 @@ void touch_atime(const struct path *path)
         * We may also fail on filesystems that have the ability to make parts
         * of the fs read only, e.g. subvolumes in Btrfs.
         */
-       now = current_fs_time(inode->i_sb);
+       now = current_time(inode);
        update_time(inode, &now, S_ATIME);
        __mnt_drop_write(mnt);
 skip_update:
@@ -1841,7 +1843,7 @@ int file_update_time(struct file *file)
        if (IS_NOCMTIME(inode))
                return 0;
 
-       now = current_fs_time(inode->i_sb);
+       now = current_time(inode);
        if (!timespec_equal(&inode->i_mtime, &now))
                sync_it = S_MTIME;
 
@@ -2097,3 +2099,26 @@ void inode_nohighmem(struct inode *inode)
        mapping_set_gfp_mask(inode->i_mapping, GFP_USER);
 }
 EXPORT_SYMBOL(inode_nohighmem);
+
+/**
+ * current_time - Return FS time
+ * @inode: inode.
+ *
+ * Return the current time truncated to the time granularity supported by
+ * the fs.
+ *
+ * Note that inode and inode->sb cannot be NULL.
+ * Otherwise, the function warns and returns time without truncation.
+ */
+struct timespec current_time(struct inode *inode)
+{
+       struct timespec now = current_kernel_time();
+
+       if (unlikely(!inode->i_sb)) {
+               WARN(1, "current_time() called with uninitialized super_block in the inode");
+               return now;
+       }
+
+       return timespec_trunc(now, inode->i_sb->s_time_gran);
+}
+EXPORT_SYMBOL(current_time);