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tile: fix comment bug in sys_cmpxchg description

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Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
This commit is contained in:
Chris Metcalf 2013-08-06 14:32:49 -04:00
parent 77f8c740d1
commit b63ea7121c
1 changed files with 1 additions and 1 deletions
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arch/tile/kernel/intvec_32.S
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@ -1609,7 +1609,7 @@ ENTRY(sys_cmpxchg)
* Because of C pointer arithmetic, we want to compute this:
*
* ((char*)atomic_locks +
* (((r0 >> 3) & (1 << (ATOMIC_HASH_SIZE - 1))) << 2))
* (((r0 >> 3) & ((1 << ATOMIC_HASH_SHIFT) - 1)) << 2))
*
* Instead of two shifts we just ">> 1", and use 'mm'
* to ignore the low and high bits we don't want.