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authorTejun Heo <tj@kernel.org>2009-08-14 14:41:02 +0900
committerTejun Heo <tj@kernel.org>2009-08-14 14:45:31 +0900
commit384be2b18a5f9475eab9ca2bdfa95cc1a04ef59c (patch)
tree04c93f391a1b65c8bf8d7ba8643c07d26c26590a /mm/percpu.c
parenta76761b621bcd8336065c4fe3a74f046858bc34c (diff)
parent142d44b0dd6741a64a7bdbe029110e7c1dcf1d23 (diff)
downloadvexpress-lsk-384be2b18a5f9475eab9ca2bdfa95cc1a04ef59c.tar.gz
Merge branch 'percpu-for-linus' into percpu-for-next
Conflicts: arch/sparc/kernel/smp_64.c arch/x86/kernel/cpu/perf_counter.c arch/x86/kernel/setup_percpu.c drivers/cpufreq/cpufreq_ondemand.c mm/percpu.c Conflicts in core and arch percpu codes are mostly from commit ed78e1e078dd44249f88b1dd8c76dafb39567161 which substituted many num_possible_cpus() with nr_cpu_ids. As for-next branch has moved all the first chunk allocators into mm/percpu.c, the changes are moved from arch code to mm/percpu.c. Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'mm/percpu.c')
-rw-r--r--mm/percpu.c23
1 files changed, 13 insertions, 10 deletions
diff --git a/mm/percpu.c b/mm/percpu.c
index b3d0bcff8c7..3f9f182f9b4 100644
--- a/mm/percpu.c
+++ b/mm/percpu.c
@@ -1004,7 +1004,7 @@ static struct pcpu_chunk *alloc_pcpu_chunk(void)
chunk->map_alloc = PCPU_DFL_MAP_ALLOC;
chunk->map[chunk->map_used++] = pcpu_unit_size;
- chunk->vm = get_vm_area(pcpu_chunk_size, GFP_KERNEL);
+ chunk->vm = get_vm_area(pcpu_chunk_size, VM_ALLOC);
if (!chunk->vm) {
free_pcpu_chunk(chunk);
return NULL;
@@ -1325,7 +1325,7 @@ size_t __init pcpu_setup_first_chunk(size_t static_size, size_t reserved_size,
int *identity_map;
/* #units == #cpus, identity mapped */
- identity_map = alloc_bootmem(num_possible_cpus() *
+ identity_map = alloc_bootmem(nr_cpu_ids *
sizeof(identity_map[0]));
for_each_possible_cpu(cpu)
@@ -1333,7 +1333,7 @@ size_t __init pcpu_setup_first_chunk(size_t static_size, size_t reserved_size,
pcpu_first_unit_cpu = 0;
pcpu_last_unit_cpu = pcpu_nr_units - 1;
- pcpu_nr_units = num_possible_cpus();
+ pcpu_nr_units = nr_cpu_ids;
pcpu_unit_map = identity_map;
}
@@ -1464,7 +1464,7 @@ ssize_t __init pcpu_embed_first_chunk(size_t static_size, size_t reserved_size,
size_sum = pcpu_calc_fc_sizes(static_size, reserved_size, &dyn_size);
unit_size = max_t(size_t, size_sum, PCPU_MIN_UNIT_SIZE);
- chunk_size = unit_size * num_possible_cpus();
+ chunk_size = unit_size * nr_cpu_ids;
base = __alloc_bootmem_nopanic(chunk_size, PAGE_SIZE,
__pa(MAX_DMA_ADDRESS));
@@ -1475,11 +1475,15 @@ ssize_t __init pcpu_embed_first_chunk(size_t static_size, size_t reserved_size,
}
/* return the leftover and copy */
- for_each_possible_cpu(cpu) {
+ for (cpu = 0; cpu < nr_cpu_ids; cpu++) {
void *ptr = base + cpu * unit_size;
- free_bootmem(__pa(ptr + size_sum), unit_size - size_sum);
- memcpy(ptr, __per_cpu_load, static_size);
+ if (cpu_possible(cpu)) {
+ free_bootmem(__pa(ptr + size_sum),
+ unit_size - size_sum);
+ memcpy(ptr, __per_cpu_load, static_size);
+ } else
+ free_bootmem(__pa(ptr), unit_size);
}
/* we're ready, commit */
@@ -1525,8 +1529,7 @@ ssize_t __init pcpu_4k_first_chunk(size_t static_size, size_t reserved_size,
PCPU_MIN_UNIT_SIZE));
/* unaligned allocations can't be freed, round up to page size */
- pages_size = PFN_ALIGN(unit_pages * num_possible_cpus() *
- sizeof(pages[0]));
+ pages_size = PFN_ALIGN(unit_pages * nr_cpu_ids * sizeof(pages[0]));
pages = alloc_bootmem(pages_size);
/* allocate pages */
@@ -1546,7 +1549,7 @@ ssize_t __init pcpu_4k_first_chunk(size_t static_size, size_t reserved_size,
/* allocate vm area, map the pages and copy static data */
vm.flags = VM_ALLOC;
- vm.size = num_possible_cpus() * unit_pages << PAGE_SHIFT;
+ vm.size = nr_cpu_ids * unit_pages << PAGE_SHIFT;
vm_area_register_early(&vm, PAGE_SIZE);
for_each_possible_cpu(cpu) {