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Message-ID: <20100323144843.GA10431@redhat.com> Date: Tue, 23 Mar 2010 15:48:43 +0100 From: Oleg Nesterov <oleg@...hat.com> To: Andrew Morton <akpm@...ux-foundation.org> Cc: David Howells <dhowells@...hat.com>, Peter Zijlstra <peterz@...radead.org>, Roland McGrath <roland@...hat.com>, linux-kernel@...r.kernel.org Subject: [PATCH -mm 2/2] keyctl_session_to_parent: use thread_group_empty() to check singlethreadness No functional changes. keyctl_session_to_parent() is the only user of signal->count which needs the correct value. Change it to use thread_group_empty() instead, this must be strictly equivalent under tasklist, and imho looks better. Signed-off-by: Oleg Nesterov <oleg@...hat.com> --- security/keys/keyctl.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- 34-rc1/security/keys/keyctl.c~MISC_2_KEYCTL 2009-12-18 19:05:38.000000000 +0100 +++ 34-rc1/security/keys/keyctl.c 2010-03-23 15:21:00.000000000 +0100 @@ -1269,7 +1269,7 @@ long keyctl_session_to_parent(void) goto not_permitted; /* the parent must be single threaded */ - if (atomic_read(&parent->signal->count) != 1) + if (!thread_group_empty(parent)) goto not_permitted; /* the parent and the child must have different session keyrings or -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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