From: Eric W. Biederman <ebiederm@xmission.com>
Date: Mon, 26 Jun 2006 07:25:57 +0000 (-0700)
Subject: [PATCH] proc: optimize proc_check_dentry_visible
X-Git-Tag: v2.6.18-rc1~748
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5b0c1dd38b66e2dd0cf655aa845e341b50b93ddd;p=pandora-kernel.git

[PATCH] proc: optimize proc_check_dentry_visible

The code doesn't need to sleep to when making this check so I can just do the
comparison and not worry about the reference counts.

TODO: While looking at this I realized that my original cleanup did not push
the permission check far enough down into the stack.  The call of
proc_check_dentry_visible needs to move out of the generic proc
readlink/follow link code and into the individual get_link instances.
Otherwise the shared resources checks are not quite correct (shared
files_struct does not require a shared fs_struct), and there are races with
unshare.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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