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-rw-r--r--fs/file.c16
1 files changed, 14 insertions, 2 deletions
diff --git a/fs/file.c b/fs/file.c
index 78cf88f2a0e8..0d1bf0515111 100644
--- a/fs/file.c
+++ b/fs/file.c
@@ -599,11 +599,18 @@ EXPORT_SYMBOL(put_unused_fd);
*
* It should never happen - if we allow dup2() do it, _really_ bad things
* will follow.
+ *
+ * NOTE: __fd_install() variant is really, really low-level; don't
+ * use it unless you are forced to by truly lousy API shoved down
+ * your throat. 'files' *MUST* be either current->files or obtained
+ * by get_files_struct(current) done by whoever had given it to you,
+ * or really bad things will happen. Normally you want to use
+ * fd_install() instead.
*/
-void fd_install(unsigned int fd, struct file *file)
+void __fd_install(struct files_struct *files, unsigned int fd,
+ struct file *file)
{
- struct files_struct *files = current->files;
struct fdtable *fdt;
spin_lock(&files->file_lock);
fdt = files_fdtable(files);
@@ -612,4 +619,9 @@ void fd_install(unsigned int fd, struct file *file)
spin_unlock(&files->file_lock);
}
+void fd_install(unsigned int fd, struct file *file)
+{
+ __fd_install(current->files, fd, file);
+}
+
EXPORT_SYMBOL(fd_install);