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| author | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2012-09-22 11:26:27 -0400 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2012-09-22 11:26:27 -0400 |
| commit | ddfb43f3881edb47aa0083651ad31983cdc42c33 (patch) | |
| tree | 7128cb13b599d2903a4deb05bbae37508b1c261e /arch/powerpc/kernel/smp.c | |
| parent | 2d6d649a2e0fa0268c0d03d5b1d330ca7907d33c (diff) | |
| parent | 5698bd757d55b1bb87edd1a9744ab09c142abfc2 (diff) | |
| download | olio-linux-3.10-ddfb43f3881edb47aa0083651ad31983cdc42c33.tar.xz olio-linux-3.10-ddfb43f3881edb47aa0083651ad31983cdc42c33.zip | |
Merge tag 'v3.6-rc6' into for-3.7
Linux 3.6-rc6 has all our bug fixes.
Conflicts (trivial overlap):
sound/soc/omap/am3517evm.c
Diffstat (limited to 'arch/powerpc/kernel/smp.c')
| -rw-r--r-- | arch/powerpc/kernel/smp.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c index 0321007086f..8d4214afc21 100644 --- a/arch/powerpc/kernel/smp.c +++ b/arch/powerpc/kernel/smp.c @@ -198,8 +198,15 @@ void smp_muxed_ipi_message_pass(int cpu, int msg) struct cpu_messages *info = &per_cpu(ipi_message, cpu); char *message = (char *)&info->messages; + /* + * Order previous accesses before accesses in the IPI handler. + */ + smp_mb(); message[msg] = 1; - mb(); + /* + * cause_ipi functions are required to include a full barrier + * before doing whatever causes the IPI. + */ smp_ops->cause_ipi(cpu, info->data); } @@ -211,7 +218,7 @@ irqreturn_t smp_ipi_demux(void) mb(); /* order any irq clear */ do { - all = xchg_local(&info->messages, 0); + all = xchg(&info->messages, 0); #ifdef __BIG_ENDIAN if (all & (1 << (24 - 8 * PPC_MSG_CALL_FUNCTION))) |