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Date: Fri, 24 Apr 2009 05:29:51 +0100 (BST) From: Hugh Dickins <hugh@...itas.com> To: Oleg Nesterov <oleg@...hat.com> cc: Linus Torvalds <torvalds@...ux-foundation.org>, Al Viro <viro@...IV.linux.org.uk>, Andrew Morton <akpm@...ux-foundation.org>, Joe Malicki <jmalicki@...acarta.com>, Michael Itz <mitz@...acarta.com>, Kenneth Baker <bakerk@...acarta.com>, Chris Wright <chrisw@...s-sol.org>, David Howells <dhowells@...hat.com>, Alexey Dobriyan <adobriyan@...il.com>, Greg Kroah-Hartman <gregkh@...e.de>, linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org, Roland McGrath <roland@...hat.com> Subject: Re: [PATCH 2/2] check_unsafe_exec: s/lock_task_sighand/rcu_read_lock/ On Fri, 23 Apr 2009, Oleg Nesterov wrote: > write_lock(&p->fs->lock); > - lock_task_sighand(p, &flags); > + rcu_read_lock(); > for (t = next_thread(p); t != p; t = next_thread(t)) { > if (t->fs == p->fs) > n_fs++; > } > + rcu_read_lock(); Not quite! if second rcu_read_lock() changed to rcu_read_unlock(), then Acked-by: Hugh Dickins <hugh@...itas.com> -- 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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