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fs_is_visible only needs namespace_sem held shared
author
Al Viro
<viro@zeniv.linux.org.uk>
Tue, 17 Sep 2013 01:37:36 +0000
(21:37 -0400)
committer
Al Viro
<viro@zeniv.linux.org.uk>
Fri, 25 Oct 2013 03:34:55 +0000
(23:34 -0400)
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
fs/namespace.c
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diff --git
a/fs/namespace.c
b/fs/namespace.c
index
827aea4
..
0e54ad6
100644
(file)
--- a/
fs/namespace.c
+++ b/
fs/namespace.c
@@
-2869,7
+2869,7
@@
bool fs_fully_visible(struct file_system_type *type)
if (unlikely(!ns))
return false;
-
namespace_lock(
);
+
down_read(&namespace_sem
);
list_for_each_entry(mnt, &ns->list, mnt_list) {
struct mount *child;
if (mnt->mnt.mnt_sb->s_type != type)
@@
-2890,7
+2890,7
@@
bool fs_fully_visible(struct file_system_type *type)
next: ;
}
found:
-
namespace_unlock(
);
+
up_read(&namespace_sem
);
return visible;
}