Messages in this thread Patch in this message | | | Date | Sun, 9 Feb 2003 07:08:27 -0500 (EST) | From | Zwane Mwaikambo <> | Subject | [PATCH][2.5][13/15] smp_call_function/_on_cpu - uml |
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smp.c | 39 +++++++++++++++++++++++++++++++++++++-- 1 files changed, 37 insertions(+), 2 deletions(-)
Index: linux-2.5.59-bk/arch/um/kernel/smp.c =================================================================== RCS file: /build/cvsroot/linux-2.5.59-bk/arch/um/kernel/smp.c,v retrieving revision 1.1.1.1 diff -u -r1.1.1.1 smp.c --- linux-2.5.59-bk/arch/um/kernel/smp.c 9 Feb 2003 09:08:37 -0000 1.1.1.1 +++ linux-2.5.59-bk/arch/um/kernel/smp.c 9 Feb 2003 09:23:30 -0000 @@ -255,8 +255,43 @@ 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; - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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