Messages in this thread | | | Date | Tue, 4 Nov 2014 14:27:31 +0100 | From | Peter Zijlstra <> | Subject | Re: [PATCH v3] bitops: Fix shift overflow in GENMASK macros |
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On Tue, Nov 04, 2014 at 11:58:17AM +0100, Maxime COQUELIN wrote: > On some 32 bits architectures, including x86, GENMASK(31, 0) returns 0 > instead of the expected ~0UL. > > This is the same on some 64 bits architectures with GENMASK_ULL(63, 0). > > This is due to an overflow in the shift operand, 1 << 32 for GENMASK, > 1 << 64 for GENMASK_ULL. > > Fixes: 10ef6b0dffe404bcc54e94cb2ca1a5b18445a66b > Cc: <stable@vger.kernel.org> #v3.13+ > Reported-by: Eric Paire <eric.paire@st.com> > Suggested-by: Peter Zijlstra <peterz@infradead.org> > Signed-off-by: Maxime Coquelin <maxime.coquelin@st.com>
There doesn't appear to be a clear maintainer for this file, so I'll try and stick in in tip.
Thanks!
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