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yaml
---
r: 174778
b: refs/heads/master
c: 1e5ad96
h: refs/heads/master
v: v3
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Bjorn Helgaas authored and Jesse Barnes committed Nov 4, 2009
1 parent 3d0472b commit 7aa96bf
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Showing 2 changed files with 15 additions and 13 deletions.
2 changes: 1 addition & 1 deletion [refs]
Original file line number Diff line number Diff line change
@@ -1,2 +1,2 @@
---
refs/heads/master: 03db42adfeeabe856dbb6894dd3aaff55838330a
refs/heads/master: 1e5ad9679016275d422e36b12a98b0927d76f556
26 changes: 14 additions & 12 deletions trunk/kernel/resource.c
Original file line number Diff line number Diff line change
Expand Up @@ -308,35 +308,37 @@ static int find_resource(struct resource *root, struct resource *new,
void *alignf_data)
{
struct resource *this = root->child;
resource_size_t start, end;

new->start = root->start;
start = root->start;
/*
* Skip past an allocated resource that starts at 0, since the assignment
* of this->start - 1 to new->end below would cause an underflow.
*/
if (this && this->start == 0) {
new->start = this->end + 1;
start = this->end + 1;
this = this->sibling;
}
for(;;) {
if (this)
new->end = this->start - 1;
end = this->start - 1;
else
new->end = root->end;
if (new->start < min)
new->start = min;
if (new->end > max)
new->end = max;
new->start = ALIGN(new->start, align);
end = root->end;
if (start < min)
start = min;
if (end > max)
end = max;
start = ALIGN(start, align);
if (alignf)
alignf(alignf_data, new, size, align);
if (new->start < new->end && new->end - new->start >= size - 1) {
new->end = new->start + size - 1;
if (start < end && end - start >= size - 1) {
new->start = start;
new->end = start + size - 1;
return 0;
}
if (!this)
break;
new->start = this->end + 1;
start = this->end + 1;
this = this->sibling;
}
return -EBUSY;
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