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authorTejun Heo <tj@kernel.org>2011-12-08 18:22:07 (GMT)
committerTejun Heo <tj@kernel.org>2011-12-08 18:22:07 (GMT)
commitc0ce8fef55896a2813a3d94e1b2d0e6d7fab6228 (patch)
tree616396e0b08f0a41eafd7d4a10bd3b2fee5726c8 /mm/memblock.c
parenteb18f1b5bfb99b1d7d2f5d792e6ee5c9b7d89330 (diff)
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memblock: Reimplement memblock_enforce_memory_limit() using __memblock_remove()
With recent updates, the basic memblock operations are robust enough that there's no reason for memblock_enfore_memory_limit() to directly manipulate memblock region arrays. Reimplement it using __memblock_remove(). Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Yinghai Lu <yinghai@kernel.org>
Diffstat (limited to 'mm/memblock.c')
-rw-r--r--mm/memblock.c42
1 files changed, 13 insertions, 29 deletions
diff --git a/mm/memblock.c b/mm/memblock.c
index 945dc31..b44875f 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -804,44 +804,28 @@ phys_addr_t __init_memblock memblock_end_of_DRAM(void)
}
/* You must call memblock_analyze() after this. */
-void __init memblock_enforce_memory_limit(phys_addr_t memory_limit)
+void __init memblock_enforce_memory_limit(phys_addr_t limit)
{
unsigned long i;
- phys_addr_t limit;
- struct memblock_region *p;
+ phys_addr_t max_addr = (phys_addr_t)ULLONG_MAX;
- if (!memory_limit)
+ if (!limit)
return;
- /* Truncate the memblock regions to satisfy the memory limit. */
- limit = memory_limit;
+ /* find out max address */
for (i = 0; i < memblock.memory.cnt; i++) {
- if (limit > memblock.memory.regions[i].size) {
- limit -= memblock.memory.regions[i].size;
- continue;
- }
-
- memblock.memory.regions[i].size = limit;
- memblock.memory.cnt = i + 1;
- break;
- }
-
- memory_limit = memblock_end_of_DRAM();
+ struct memblock_region *r = &memblock.memory.regions[i];
- /* And truncate any reserves above the limit also. */
- for (i = 0; i < memblock.reserved.cnt; i++) {
- p = &memblock.reserved.regions[i];
-
- if (p->base > memory_limit)
- p->size = 0;
- else if ((p->base + p->size) > memory_limit)
- p->size = memory_limit - p->base;
-
- if (p->size == 0) {
- memblock_remove_region(&memblock.reserved, i);
- i--;
+ if (limit <= r->size) {
+ max_addr = r->base + limit;
+ break;
}
+ limit -= r->size;
}
+
+ /* truncate both memory and reserved regions */
+ __memblock_remove(&memblock.memory, max_addr, (phys_addr_t)ULLONG_MAX);
+ __memblock_remove(&memblock.reserved, max_addr, (phys_addr_t)ULLONG_MAX);
}
static int __init_memblock memblock_search(struct memblock_type *type, phys_addr_t addr)