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| author | Maxime COQUELIN <maxime.coquelin@st.com> | 2014-11-06 12:54:19 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2014-11-16 11:55:39 +0300 |
| commit | 00b4d9a14125f1e51874def2b9de6092e007412d (patch) | |
| tree | e53b171b4b55fa49779bdb52e47ca26209da2867 /virt | |
| parent | 206c5f60a3d902bc4b56dab2de3e88de5eb06108 (diff) | |
| download | linux-00b4d9a14125f1e51874def2b9de6092e007412d.tar.xz | |
bitops: Fix shift overflow in GENMASK macros
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.
Reported-by: Eric Paire <eric.paire@st.com>
Suggested-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Maxime Coquelin <maxime.coquelin@st.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: <stable@vger.kernel.org> # v3.13+
Cc: linux@rasmusvillemoes.dk
Cc: gong.chen@linux.intel.com
Cc: John Sullivan <jsrhbz@kanargh.force9.co.uk>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Theodore Ts'o <tytso@mit.edu>
Fixes: 10ef6b0dffe4 ("bitops: Introduce a more generic BITMASK macro")
Link: http://lkml.kernel.org/r/1415267659-10563-1-git-send-email-maxime.coquelin@st.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'virt')
0 files changed, 0 insertions, 0 deletions