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profiling: fix broken profiling regression 

Impact: fix broken /proc/profile on UP machines

Commit c309b917ca "cpumask: convert
kernel/profile.c" broke profiling.  prof_cpu_mask was previously
initialized to CPU_MASK_ALL, but left uninitialized in that commit.
We need to copy cpu_possible_mask (cpu_online_mask is not enough).

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Hugh Dickins 2009-02-09 19:20:50 +00:00 committed by Ingo Molnar
parent 4c098bcd55
commit acd895795d
1 changed files with 3 additions and 0 deletions
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3
kernel/profile.c
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@ -114,12 +114,15 @@ int __ref profile_init(void)
if (!slab_is_available()) {
prof_buffer = alloc_bootmem(buffer_bytes);
alloc_bootmem_cpumask_var(&prof_cpu_mask);
cpumask_copy(prof_cpu_mask, cpu_possible_mask);
return 0;
}
if (!alloc_cpumask_var(&prof_cpu_mask, GFP_KERNEL))
return -ENOMEM;
cpumask_copy(prof_cpu_mask, cpu_possible_mask);
prof_buffer = kzalloc(buffer_bytes, GFP_KERNEL);
if (prof_buffer)
return 0;