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fs_is_visible only needs namespace_sem held shared

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2013-09-16 21:37:36 -04:00
parent 59aa0da8e2
commit 44bb4385ce
1 changed files with 2 additions and 2 deletions
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4
fs/namespace.c
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@ -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;
}