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| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2010-02-23 01:05:01 (GMT) |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2010-02-25 09:34:57 (GMT) |
| commit | 20133cfce7d0bbdcc0c398301030c091f5675c88 (patch) | |
| tree | 337f242bfc89f5880cf86234fa6b574f52a2f0a5 /arch/um | |
| parent | 1bd22e374b20c2f0ba1d2723c1f585acab2251c5 (diff) | |
| download | linux-20133cfce7d0bbdcc0c398301030c091f5675c88.tar.xz | |
rcu: Stop overflowing signed integers
The C standard does not specify the result of an operation that
overflows a signed integer, so such operations need to be
avoided. This patch changes the type of several fields from
"long" to "unsigned long" and adjusts operations as needed.
ULONG_CMP_GE() and ULONG_CMP_LT() macros are introduced to do
the modular comparisons that are appropriate given that overflow
is an expected event.
Acked-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: laijs@cn.fujitsu.com
Cc: dipankar@in.ibm.com
Cc: mathieu.desnoyers@polymtl.ca
Cc: josh@joshtriplett.org
Cc: dvhltc@us.ibm.com
Cc: niv@us.ibm.com
Cc: peterz@infradead.org
Cc: rostedt@goodmis.org
Cc: Valdis.Kletnieks@vt.edu
Cc: dhowells@redhat.com
LKML-Reference: <1266887105-1528-17-git-send-email-paulmck@linux.vnet.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/um')
0 files changed, 0 insertions, 0 deletions