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| author | Vineet Gupta <vgupta@synopsys.com> | 2014-12-15 14:12:24 +0100 |
|---|---|---|
| committer | Vineet Gupta <vgupta@synopsys.com> | 2015-02-02 12:38:37 +0100 |
| commit | 7082a29c22ac0ab276b346f2a5c1d24a2102f158 (patch) | |
| tree | 142b459ce955e962cb486abef8f08af813f351a5 /arch/arc | |
| parent | ARC: add some more comments to ret_from_fork (diff) | |
| download | linux-7082a29c22ac0ab276b346f2a5c1d24a2102f158.tar.xz linux-7082a29c22ac0ab276b346f2a5c1d24a2102f158.zip | |
ARC: use ACCESS_ONCE in cmpxchg loop
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to 'arch/arc')
| -rw-r--r-- | arch/arc/kernel/smp.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arc/kernel/smp.c b/arch/arc/kernel/smp.c index 20ebb602ea2f..6a400b1b0b62 100644 --- a/arch/arc/kernel/smp.c +++ b/arch/arc/kernel/smp.c @@ -221,7 +221,7 @@ static void ipi_send_msg_one(int cpu, enum ipi_msg_type msg) * and read back old value */ do { - new = old = *ipi_data_ptr; + new = old = ACCESS_ONCE(*ipi_data_ptr); new |= 1U << msg; } while (cmpxchg(ipi_data_ptr, old, new) != old); |