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| author | Milton Miller <miltonm@bga.com> | 2011-05-10 19:29:17 +0000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2011-05-19 15:30:53 +1000 |
| commit | 3caba98fddd551ca7dcdb1eb701b36ed70b04fde (patch) | |
| tree | 85239e83532cd2b800e2c161bfb712961d7991a0 /arch/powerpc/sysdev/mpic.c | |
| parent | f1072939b6dd01d038d47db0bdc01b33e5f90f28 (diff) | |
| download | blackbird-op-linux-3caba98fddd551ca7dcdb1eb701b36ed70b04fde.tar.gz blackbird-op-linux-3caba98fddd551ca7dcdb1eb701b36ed70b04fde.zip | |
powerpc/mpic: Simplify ipi cpu mask handling
Now that MSG_ALL and MSG_ALL_BUT_SELF have been eliminated,
smp_mpic_mesage_pass no longer needs to lookup the cpumask just to
have mpic_send_ipi extract part of it and recode it in a NR_CPUS loop
by mpic_physmask.
Signed-off-by: Milton Miller <miltonm@bga.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/sysdev/mpic.c')
| -rw-r--r-- | arch/powerpc/sysdev/mpic.c | 24 |
1 files changed, 11 insertions, 13 deletions
diff --git a/arch/powerpc/sysdev/mpic.c b/arch/powerpc/sysdev/mpic.c index 68ea50c41902..53121f625068 100644 --- a/arch/powerpc/sysdev/mpic.c +++ b/arch/powerpc/sysdev/mpic.c @@ -1613,30 +1613,28 @@ void mpic_request_ipis(void) } } -static void mpic_send_ipi(unsigned int ipi_no, const struct cpumask *cpu_mask) +void smp_mpic_message_pass(int cpu, int msg) { struct mpic *mpic = mpic_primary; + u32 physmask; BUG_ON(mpic == NULL); -#ifdef DEBUG_IPI - DBG("%s: send_ipi(ipi_no: %d)\n", mpic->name, ipi_no); -#endif - - mpic_cpu_write(MPIC_INFO(CPU_IPI_DISPATCH_0) + - ipi_no * MPIC_INFO(CPU_IPI_DISPATCH_STRIDE), - mpic_physmask(cpumask_bits(cpu_mask)[0])); -} - -void smp_mpic_message_pass(int cpu, int msg) -{ /* make sure we're sending something that translates to an IPI */ if ((unsigned int)msg > 3) { printk("SMP %d: smp_message_pass: unknown msg %d\n", smp_processor_id(), msg); return; } - mpic_send_ipi(msg, cpumask_of(cpu)); + +#ifdef DEBUG_IPI + DBG("%s: send_ipi(ipi_no: %d)\n", mpic->name, msg); +#endif + + physmask = 1 << get_hard_smp_processor_id(cpu); + + mpic_cpu_write(MPIC_INFO(CPU_IPI_DISPATCH_0) + + msg * MPIC_INFO(CPU_IPI_DISPATCH_STRIDE), physmask); } int __init smp_mpic_probe(void) |
