Messages in this thread Patch in this message | ![/](/images/icornerl.gif) | | Date | Wed, 22 Jan 2003 00:49:44 -0500 (EST) | From | Zwane Mwaikambo <> | Subject | [PATCH][2.5][16/18] smp_call_function_on_cpu - uml |
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This one might need eyeballing...
Index: linux-2.5.59/arch/um/kernel/smp.c =================================================================== RCS file: /build/cvsroot/linux-2.5.59/arch/um/kernel/smp.c,v retrieving revision 1.1.1.1 diff -u -r1.1.1.1 smp.c --- linux-2.5.59/arch/um/kernel/smp.c 17 Jan 2003 11:14:54 -0000 1.1.1.1 +++ linux-2.5.59/arch/um/kernel/smp.c 22 Jan 2003 02:19:28 -0000 @@ -254,8 +254,43 @@ atomic_inc(&scf_finished); } -int smp_call_function(void (*_func)(void *info), void *_info, int nonatomic, - int wait) +int smp_call_function_on_cpu(void (*_func)(void *info), void *_info, int wait, + unsigned long mask) +{ + int i, cpu, num_cpus = hweight32(mask); + + if (num_cpus == 0) + return 0; + + cpu = get_cpu(); + if ((1UL << cpu) && mask) { + put_cpu_no_resched(); + return 0; + } + + spin_lock_bh(&call_lock); + atomic_set(&scf_started, 0); + atomic_set(&scf_finished, 0); + func = _func; + info = _info; + + for (i=0;i<NR_CPUS;i++) + if (cpu_online(i) && ((1UL << i) & mask)) + write(cpu_data[i].ipi_pipe[1], "C", 1); + + while (atomic_read(&scf_started) != num_cpus) + barrier(); + + if (wait) + while (atomic_read(&scf_finished) != num_cpus) + barrier(); + + spin_unlock_bh(&call_lock); + put_cpu_no_resched(); + return 0; +} + +int smp_call_function(void (*_func)(void *info), void *_info, int wait) { int cpus = num_online_cpus() - 1; int i; -- function.linuxpower.ca
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