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authorAl Viro <viro@zeniv.linux.org.uk>2012-08-15 20:00:58 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2012-09-26 21:08:54 -0400
commitb9e02af0ae0783894abb576fbab45ec29aa8e7fc (patch)
tree42e01d147784f8e8ae327c1dd4fb405d587cc4aa /fs/file.c
parent7cf4dc3c8dbfdfde163d4636f621cf99a1f63bfb (diff)
downloadlinux-b9e02af0ae0783894abb576fbab45ec29aa8e7fc.tar.bz2
don't bother with call_rcu() in put_files_struct()
At that point nobody can see us anyway; everything that looks at files_fdtable(files) is separated from the guts of put_files_struct(files) - either since files is current->files or because we fetched it under task_lock() and hadn't dropped that yet, or because we'd bumped files->count while holding task_lock()... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/file.c')
-rw-r--r--fs/file.c14
1 files changed, 5 insertions, 9 deletions
diff --git a/fs/file.c b/fs/file.c
index 0be423cadb26..533fa5d56a5f 100644
--- a/fs/file.c
+++ b/fs/file.c
@@ -447,18 +447,14 @@ void put_files_struct(struct files_struct *files)
if (atomic_dec_and_test(&files->count)) {
close_files(files);
- /*
- * Free the fd and fdset arrays if we expanded them.
- * If the fdtable was embedded, pass files for freeing
- * at the end of the RCU grace period. Otherwise,
- * you can free files immediately.
- */
+ /* not really needed, since nobody can see us */
rcu_read_lock();
fdt = files_fdtable(files);
- if (fdt != &files->fdtab)
- kmem_cache_free(files_cachep, files);
- free_fdtable(fdt);
rcu_read_unlock();
+ /* free the arrays if they are not embedded */
+ if (fdt != &files->fdtab)
+ __free_fdtable(fdt);
+ kmem_cache_free(files_cachep, files);
}
}