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cma: Introduce cma_for_each_area

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Frameworks (e.g. Ion) may want to iterate over each possible CMA area to
allow for enumeration. Introduce a function to allow a callback.

Signed-off-by: Laura Abbott <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Laura Abbott 2017-04-18 11:27:04 -07:00 • committed by Greg Kroah-Hartman
commit e4231bcda7
2 changed files with 16 additions and 0 deletions
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14
mm/cma.c
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@ -504,3 +504,17 @@ bool cma_release(struct cma *cma, const struct page *pages, unsigned int count)
return true;
}
int cma_for_each_area(int (*it)(struct cma *cma, void *data), void *data)
{
int i;
for (i = 0; i < cma_area_count; i++) {
int ret = it(&cma_areas[i], data);
if (ret)
return ret;
}
return 0;
}