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rcu: Fix precedence error in cpu_needs_another_gp()

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The fix introduced by a10d206e (rcu: Fix day-one dyntick-idle
stall-warning bug) has a C-language precedence error.  It turns out
that this error is harmless in that the same result is computed for all
inputs, but the code is nevertheless a potential source of confusion.
This commit therefore introduces parentheses in order to force the
execution of the code to reflect the intent.

Reported-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
This commit is contained in:
Paul E. McKenney
2012-10-15 08:24:54 -07:00
committed by Paul E. McKenney
parent 3705b88db0
commit 340f588bba
1 changed files with 1 additions and 1 deletions
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kernel/rcutree.c
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@ -313,7 +313,7 @@ static int
cpu_needs_another_gp(struct rcu_state *rsp, struct rcu_data *rdp) cpu_needs_another_gp(struct rcu_state *rsp, struct rcu_data *rdp)
{ {
return *rdp->nxttail[RCU_DONE_TAIL + return *rdp->nxttail[RCU_DONE_TAIL +
ACCESS_ONCE(rsp->completed) != rdp->completed] && (ACCESS_ONCE(rsp->completed) != rdp->completed)] &&
!rcu_gp_in_progress(rsp); !rcu_gp_in_progress(rsp);
} }