Messages in this thread | | | Date | Fri, 27 Aug 2010 13:51:06 -0400 | Subject | Re: [PATCH] VFS: Sanity check mount flags passed to change_mnt_propagation() | From | Bob Copeland <> |
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On Fri, Aug 27, 2010 at 1:43 PM, Valerie Aurora <vaurora@redhat.com> wrote: > On Thu, Aug 26, 2010 at 07:14:36PM -0600, Matthew Wilcox wrote: >> Hrm. I think we can do this a bit more pithily. >> >> /* Only one propagation flag should be set, and no others */ >> if (hweight32(type) != 1 && >> (type & ~(MS_SHARED | MS_PRIVATE | MS_SLAVE | MS_UNBINDABLE)) >> return 0; >> >> Too clever? > > I was hoping someone would go find the best bitop for me, thanks. :) > hweight32() is an awkward name but the comment makes it clear. I'm > happy with either. > > Thanks for the help,
Didn't read surrounding code, but is that supposed to be '||'?
Otherwise the case where only a single non-propagation flag is set no longer returns 0...
-- Bob Copeland %% www.bobcopeland.com -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.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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